2018-19 UK Tax Return Calculator
Calculate your tax refund or liability for the 2018-19 tax year (6 April 2018 to 5 April 2019). Get an accurate estimate of your income tax, National Insurance contributions, and potential refund.
Comprehensive 2018-19 Tax Return Calculator Guide
Module A: Introduction & Importance of the 2018-19 Tax Return Calculator
The 2018-19 tax year (6 April 2018 to 5 April 2019) introduced several important changes to UK taxation that continue to affect taxpayers today. This calculator provides an accurate estimation of your tax liability or refund for that specific period, incorporating all the relevant tax bands, allowances, and deductions that were in effect.
Understanding your 2018-19 tax position remains crucial for several reasons:
- Historical Accuracy: Many taxpayers need to amend or review past tax returns, especially if they’ve received letters from HMRC about potential discrepancies.
- Refund Claims: The standard time limit for claiming tax refunds is 4 years from the end of the tax year, meaning you have until 5 April 2023 to claim for 2018-19.
- Financial Planning: Accurate historical tax data helps in forecasting future tax liabilities and planning your finances accordingly.
- Legal Compliance: HMRC can investigate tax returns up to 20 years back in cases of suspected fraud, making accurate record-keeping essential.
Key features of the 2018-19 tax year included:
- Personal allowance increased to £11,850 (from £11,500 in 2017-18)
- Basic rate band increased to £34,500 (total taxable income up to £46,350)
- Higher rate threshold at £46,351 (£34,501 above personal allowance)
- Additional rate threshold remained at £150,000
- Dividend allowance reduced to £2,000 (from £5,000 in 2017-18)
- Personal savings allowance remained at £1,000 for basic rate taxpayers
Module B: How to Use This 2018-19 Tax Return Calculator
Follow these step-by-step instructions to get the most accurate tax calculation for the 2018-19 tax year:
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Gather Your Information:
Collect your P60, P45, P11D (if applicable), and any records of additional income. For self-employed individuals, you’ll need your profit calculations for the year.
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Enter Your Employment Income:
Input your total employment income before tax (gross income) from your P60. This should include salary, bonuses, and any benefits that were taxable.
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Add Self-Employment Profits:
If you were self-employed during 2018-19, enter your total taxable profits (not turnover). This is the figure after deducting allowable expenses from your income.
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Include Pension Contributions:
Enter any personal pension contributions you made that qualify for tax relief. This includes contributions to personal pensions, stakeholder pensions, or retirement annuity contracts.
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Add Gift Aid Donations:
Input the total amount of donations you made to charities under the Gift Aid scheme. These can increase your basic rate band.
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Enter Investment Income:
Include any dividend income (after the £2,000 dividend allowance) and savings interest (after your personal savings allowance).
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Select Your Tax Code:
Choose the tax code that appears on your P60 or tax coding notice. If you had multiple jobs, use the code from your main employment. For custom codes, select “Custom Tax Code” and enter your specific code.
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Student Loan Information:
Select your student loan plan if you were repaying a student loan during 2018-19. The calculator will automatically apply the correct repayment threshold (£18,330 for Plan 1, £25,000 for Plan 2).
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Scottish Taxpayer Status:
Check this box if you were resident in Scotland for tax purposes during 2018-19. Scottish taxpayers had different income tax rates and bands.
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Review Your Results:
After clicking “Calculate”, review the breakdown of your tax liability. The results show your total income, personal allowance, taxable income, income tax due, National Insurance contributions, and any student loan repayments.
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Interpret the Chart:
The visual chart shows how your income is taxed across different bands. This helps you understand where your money goes and potential areas for tax planning.
Module C: Formula & Methodology Behind the Calculator
The 2018-19 tax return calculator uses precise mathematical formulas based on HMRC’s official guidance and tax legislation in effect for that year. Here’s a detailed breakdown of the calculation methodology:
1. Income Aggregation
The calculator first aggregates all sources of income:
Total Income = Employment Income + Self-Employment Profit + (Dividend Income - Dividend Allowance) + (Savings Interest - Personal Savings Allowance)
2. Personal Allowance Calculation
The personal allowance for 2018-19 was £11,850, but this could be reduced if your income exceeded £100,000:
If Income > £100,000:
Personal Allowance Reduction = (Income - £100,000) / 2
Adjusted Personal Allowance = £11,850 - Personal Allowance Reduction
Else:
Adjusted Personal Allowance = £11,850
3. Taxable Income Determination
Taxable Income = Total Income - Adjusted Personal Allowance - Pension Contributions - Gift Aid Donations
4. Income Tax Calculation
The calculator applies the 2018-19 tax bands to your taxable income. For English/Welsh taxpayers:
| Tax Band | Taxable Income Range | Tax Rate | Scottish Taxpayer Rate |
|---|---|---|---|
| Personal Allowance | Up to £11,850 | 0% | 0% |
| Basic Rate | £11,851 to £46,350 | 20% | 19% (Starter: £11,851-£13,850) 20% (Basic: £13,851-£24,000) 21% (Intermediate: £24,001-£43,430) |
| Higher Rate | £46,351 to £150,000 | 40% | 41% (£43,431-£150,000) |
| Additional Rate | Over £150,000 | 45% | 46% |
5. National Insurance Contributions
For employed individuals (Class 1 NICs):
| Weekly Earnings | Employee Rate | Employer Rate |
|---|---|---|
| Below £162 (Primary Threshold) | 0% | 0% |
| £162.01 to £892 (Upper Earnings Limit) | 12% | 13.8% |
| Above £892 | 2% | 13.8% |
For self-employed individuals:
- Class 2 NICs: £2.95 per week if profits ≥ £6,205
- Class 4 NICs:
- 9% on profits between £8,424 and £46,350
- 2% on profits above £46,350
6. Student Loan Repayments
Plan 1: 9% of income above £18,330
Plan 2: 9% of income above £25,000
Postgraduate: 6% of income above £21,000
7. Dividend Tax Calculation
After the £2,000 dividend allowance:
| Tax Band | Dividend Tax Rate |
|---|---|
| Basic Rate | 7.5% |
| Higher Rate | 32.5% |
| Additional Rate | 38.1% |
8. Savings Income Tax
After the personal savings allowance (£1,000 for basic rate taxpayers, £500 for higher rate):
| Tax Band | Savings Tax Rate |
|---|---|
| Basic Rate | 20% |
| Higher Rate | 40% |
| Additional Rate | 45% |
9. Final Calculation
Total Tax Liability = Income Tax + National Insurance + Student Loan Repayments + Dividend Tax + Savings Tax
Net Result = Total Tax Paid (from inputs) - Total Tax Liability
Module D: Real-World Examples & Case Studies
To illustrate how the calculator works in practice, here are three detailed case studies with specific numbers from the 2018-19 tax year:
Case Study 1: Basic Rate Taxpayer with Employment Income
Profile: Sarah, 32, single, no children, employed as a marketing manager
- Employment income: £35,000
- Pension contributions: £2,000 (workplace pension)
- Gift Aid donations: £500
- Tax code: 1185L (standard)
- No student loan
- Not a Scottish taxpayer
Calculation Breakdown:
| Personal Allowance | £11,850 |
| Taxable Income (£35,000 – £11,850 – £2,000 – £500) | £20,650 |
| Income Tax (20% of £20,650) | £4,130 |
| National Insurance (12% on £35,000 – £8,424 = £26,576) | £3,189.12 |
| Total Tax & NI | £7,319.12 |
| Take-home pay | £27,680.88 |
Case Study 2: Higher Rate Taxpayer with Multiple Income Sources
Profile: James, 45, married, self-employed consultant with investment income
- Self-employment profit: £60,000
- Dividend income: £8,000
- Savings interest: £1,500
- Pension contributions: £5,000
- Tax code: 1185L
- Student loan: Plan 2
- Not a Scottish taxpayer
Calculation Breakdown:
| Personal Allowance | £11,850 |
| Taxable Income (£60,000 + £6,000 + £500 – £5,000) | £61,500 |
Income Tax:
|
£15,110 |
National Insurance:
|
£4,035.36 |
| Student Loan (9% on £60,000 – £25,000) | £3,150 |
| Total Tax & Deductions | £22,295.36 |
| Net Income | £37,704.64 |
Case Study 3: Scottish Taxpayer with Complex Finances
Profile: Fiona, 50, single, employed part-time with rental income
- Employment income: £28,000
- Rental profit: £12,000
- Dividend income: £3,000
- Pension contributions: £3,600
- Tax code: S1185L (Scottish)
- Student loan: Plan 1
- Scottish taxpayer
Calculation Breakdown (Scottish Rates):
| Personal Allowance | £11,850 |
| Taxable Income (£28,000 + £12,000 + £1,000 – £3,600) | £37,400 |
Income Tax:
|
£5,309.50 |
National Insurance:
|
£2,349.12 |
| Student Loan (9% on £28,000 – £18,330) | £874.83 |
| Total Tax & Deductions | £8,533.45 |
| Net Income | £28,866.55 |
Module E: Data & Statistics from the 2018-19 Tax Year
The 2018-19 tax year saw several notable trends in UK taxation. Below are key statistics and comparative tables that provide context for your tax calculations.
1. Income Tax Receipts by Band (2018-19)
| Tax Band | Number of Taxpayers (millions) | Average Tax Paid | Total Revenue (£bn) | % of Total Revenue |
|---|---|---|---|---|
| Basic Rate | 24.1 | £3,200 | 77.1 | 38.6% |
| Higher Rate | 4.2 | £12,500 | 52.5 | 26.3% |
| Additional Rate | 0.3 | £45,000 | 13.5 | 6.8% |
| Savings & Dividends | 12.5 | £1,100 | 13.8 | 6.9% |
| Total | 30.6 | £5,300 | 199.9 | 100% |
Source: HMRC Annual Report 2019
2. National Insurance Contributions by Class (2018-19)
| NIC Class | Number of Contributors (millions) | Average Annual Contribution | Total Revenue (£bn) |
|---|---|---|---|
| Class 1 (Employees) | 26.8 | £2,100 | 56.3 |
| Class 1 (Employers) | 1.8m employers | £3,800 per employee | 68.4 |
| Class 2 (Self-employed) | 4.3 | £154 | 0.7 |
| Class 4 (Self-employed) | 4.3 | £1,800 | 7.7 |
| Total | 31.1 | £2,500 | 133.1 |
Source: HMRC NIC Statistics 2019
3. Key Tax Thresholds Comparison (2017-18 vs 2018-19)
| Threshold | 2017-18 | 2018-19 | Change | % Increase |
|---|---|---|---|---|
| Personal Allowance | £11,500 | £11,850 | £350 | 3.0% |
| Basic Rate Limit | £33,500 | £34,500 | £1,000 | 3.0% |
| Higher Rate Threshold | £45,000 | £46,350 | £1,350 | 3.0% |
| Dividend Allowance | £5,000 | £2,000 | -£3,000 | -60.0% |
| Personal Savings Allowance (Basic) | £1,000 | £1,000 | £0 | 0.0% |
| National Insurance PT (Weekly) | £157 | £162 | £5 | 3.2% |
| National Insurance UEL (Weekly) | £866 | £892 | £26 | 3.0% |
4. Regional Tax Revenue Distribution (2018-19)
Income tax revenues varied significantly across UK regions:
| Region | Income Tax Revenue (£bn) | % of UK Total | Avg Tax per Taxpayer |
|---|---|---|---|
| London | 68.2 | 34.2% | £7,800 |
| South East | 32.5 | 16.3% | £5,200 |
| North West | 15.8 | 7.9% | £4,100 |
| East of England | 14.7 | 7.4% | £4,800 |
| Scotland | 13.2 | 6.6% | £4,500 |
| West Midlands | 12.9 | 6.5% | £4,000 |
| Yorkshire & Humber | 11.4 | 5.7% | £3,900 |
| UK Total | 199.9 | 100% | £5,300 |
Source: HMRC Regional Statistics 2019
Module F: Expert Tips for Maximizing Your 2018-19 Tax Return
Even for past tax years, there are often opportunities to optimize your tax position. Here are expert strategies specifically for the 2018-19 tax year:
1. Claim All Allowable Expenses
- Self-employed expenses:
- Home office costs (proportion of rent, mortgage interest, utilities)
- Business mileage (45p per mile for first 10,000 miles)
- Professional subscriptions and training courses
- Business insurance premiums
- Marketing and advertising costs
- Employment expenses:
- Professional fees and subscriptions required for your job
- Travel expenses not reimbursed by employer
- Cost of tools and equipment (if required for work)
- Homeworking allowance (£4/week without receipts)
- Property income expenses:
- Repairs and maintenance (but not improvements)
- Letting agent fees
- Ground rent and service charges
- Insurance premiums
- 20% of finance costs (mortgage interest relief phased in)
2. Optimize Pension Contributions
- For 2018-19, you could contribute up to £40,000 or 100% of your earnings (whichever is lower) and receive tax relief at your marginal rate.
- If you didn’t use your full allowance, you might be able to carry forward unused allowances from the previous 3 years (2015-16 to 2017-18).
- Higher rate taxpayers could claim additional 20% relief through self-assessment.
- Consider making a contribution before the deadline to reduce your taxable income below key thresholds (e.g., £100,000 to preserve personal allowance).
3. Utilize Marriage Allowance
- If you were married or in a civil partnership and one partner earned less than £11,850, you could transfer 10% of their personal allowance (£1,185) to the higher earner.
- This could save up to £237 in tax for the year.
- You can backdate claims for up to 4 years, so 2018-19 claims are still possible until April 2023.
- Apply through the GOV.UK Marriage Allowance service.
4. Claim Tax Relief on Charitable Donations
- For every £1 you donated to charity under Gift Aid, the charity could claim 25p from HMRC.
- As a higher rate taxpayer, you could claim back the difference between the basic rate and your highest rate of tax (20% or 25%).
- Example: If you donated £1,000, the charity gets £1,250, and you can claim £250 (20%) or £312.50 (25%) back through self-assessment.
- Ensure you have records of all donations, including the charity’s name, date, and amount.
5. Review Your Tax Code
- Common tax code errors in 2018-19 included:
- Incorrect personal allowance (should be 1185L for most people)
- Outdated information from previous years
- Missing adjustments for company benefits
- Incorrect Scottish tax codes (should start with ‘S’)
- If you believe your code was wrong, you can request a review from HMRC. For 2018-19, you have until 5 April 2023 to claim any refunds.
- Use HMRC’s tax code checker to verify your code.
6. Capital Allowances for Business Assets
- The Annual Investment Allowance (AIA) was £200,000 for 2018-19, allowing full tax relief on qualifying business assets up to this limit.
- Qualifying assets include:
- Machinery and equipment
- Office equipment (computers, printers)
- Vans and certain cars
- Renovations to business premises
- If you purchased assets for your business, ensure you claimed the full AIA where applicable.
- For assets over £200,000, writing down allowances at 18% or 8% may apply.
7. Property Income Strategies
- Rent-a-Room Relief: If you rented out a room in your home, you could earn up to £7,500 tax-free under the Rent-a-Room scheme.
- Replacement of Domestic Items Relief: For furnished residential lettings, you could claim tax relief for replacing furniture, appliances, and kitchenware.
- Finance Cost Restriction: From 2017-18, mortgage interest relief was being phased in as a 20% tax credit. For 2018-19, 50% of finance costs were restricted.
- Property Allowance: If your property income was below £1,000, you might not need to declare it (but you couldn’t claim expenses either).
8. Handling HMRC Enquiries
- HMRC can open an enquiry into your 2018-19 tax return until 5 April 2020 (normal enquiry window) or longer in cases of suspected fraud.
- If you receive an enquiry letter:
- Respond promptly (usually within 30 days)
- Gather all supporting documentation
- Consider professional advice if the enquiry is complex
- Be cooperative but don’t volunteer unnecessary information
- Common triggers for enquiries include:
- Large fluctuations in income year-on-year
- Expenses that seem high for your industry
- Late filing or payment history
- Discrepancies with third-party data (e.g., from banks or employers)
9. Record Keeping Requirements
- For 2018-19, you must keep records until at least 31 January 2025 (5 years from the filing deadline).
- Required records include:
- Invoices and receipts for income and expenses
- Bank statements
- P60 and P11D forms
- Mileage logs (if claiming business mileage)
- Contracts and agreements
- Asset purchase records
- Digital records are acceptable if they’re accurate and complete.
- If you’re self-employed, consider using accounting software to maintain organized records.
10. Late Filing and Payment Penalties
- For 2018-19 returns (due by 31 January 2020):
- 1 day late: £100 penalty (even if no tax is owed)
- 3 months late: Additional £10 per day (up to 90 days)
- 6 months late: £300 or 5% of tax due (whichever is higher)
- 12 months late: Another £300 or 5% of tax due
- Late payment penalties:
- 30 days late: 5% of unpaid tax
- 6 months late: Additional 5%
- 12 months late: Another 5%
- Interest is charged on late payments at 3.25% (from 6 April 2019).
- If you have a reasonable excuse, you can appeal penalties.
Module G: Interactive FAQ About 2018-19 Tax Returns
Can I still file my 2018-19 tax return and claim a refund?
Yes, you can still file your 2018-19 tax return and claim a refund until 5 April 2023. This is because the standard time limit for claiming tax refunds is 4 years from the end of the tax year. After this date, you’ll generally lose your right to claim any refund for that year.
To file late:
- Register for Self Assessment if you haven’t already
- Complete the 2018-19 tax return online or on paper
- Include all income and expenses for that year
- Submit the return and wait for HMRC to process your refund
Note that if you owe tax for 2018-19, you should file as soon as possible to avoid further late filing penalties.
What was the personal allowance for 2018-19 and how was it different from previous years?
The personal allowance for 2018-19 was £11,850. This represented a £350 increase from the 2017-18 allowance of £11,500, continuing the government’s policy of gradually increasing the personal allowance each year.
Key differences from previous years:
- 2017-18: £11,500 personal allowance
- 2018-19: £11,850 personal allowance (+3.0%)
- 2019-20: £12,500 personal allowance (+5.5%)
The personal allowance began to be reduced by £1 for every £2 of income over £100,000, meaning individuals earning £123,700 or more received no personal allowance in 2018-19.
For Scottish taxpayers, while the personal allowance was the same, the income tax bands and rates above the personal allowance were different from the rest of the UK.
How did the dividend allowance change in 2018-19 and how does it affect my tax?
The dividend allowance was significantly reduced in 2018-19 from £5,000 in 2017-18 to £2,000. This change increased the tax liability for many investors and business owners who receive dividend income.
Impact of the change:
- Basic rate taxpayers now pay tax on dividend income above £2,000 at 7.5%
- Higher rate taxpayers pay 32.5% on dividends above £2,000
- Additional rate taxpayers pay 38.1% on dividends above £2,000
Example calculation:
If you received £10,000 in dividends in 2018-19:
- Tax-free allowance: £2,000
- Taxable dividends: £8,000
- Tax due (basic rate): £8,000 × 7.5% = £600
Compare this to 2017-18 where you would have paid tax on only £5,000 of dividends (£10,000 – £5,000 allowance), resulting in £375 tax at the basic rate – a £225 increase.
This change particularly affected:
- Small business owners who pay themselves through dividends
- Investors with substantial dividend income from shares
- Individuals with income just above the higher rate threshold
What are the key differences between Scottish and rest-of-UK income tax in 2018-19?
In 2018-19, Scotland introduced a more progressive income tax system that differed significantly from the rest of the UK. Here are the key differences:
Rest of UK (England, Wales, Northern Ireland):
| Band | Taxable Income | Rate |
|---|---|---|
| Personal Allowance | Up to £11,850 | 0% |
| Basic Rate | £11,851 to £46,350 | 20% |
| Higher Rate | £46,351 to £150,000 | 40% |
| Additional Rate | Over £150,000 | 45% |
Scotland:
| Band | Taxable Income | Rate |
|---|---|---|
| Personal Allowance | Up to £11,850 | 0% |
| Starter Rate | £11,851 to £13,850 | 19% |
| Basic Rate | £13,851 to £24,000 | 20% |
| Intermediate Rate | £24,001 to £43,430 | 21% |
| Higher Rate | £43,431 to £150,000 | 41% |
| Top Rate | Over £150,000 | 46% |
Key implications:
- Scottish taxpayers with incomes between £24,001 and £43,430 paid 1% more tax than other UK taxpayers (21% vs 20%)
- Those earning between £43,431 and £46,350 paid significantly more (41% vs 20% in rUK)
- Higher earners (£46,351 to £150,000) paid 1% more (41% vs 40%)
- Top earners (over £150,000) paid 1% more (46% vs 45%)
- Lower earners (under £24,000) generally paid the same or slightly less than rUK taxpayers
Scottish taxpayers also had different tax codes (starting with ‘S’) and needed to use different tax tables when calculating their liability.
What records do I need to keep for my 2018-19 tax return and for how long?
For your 2018-19 tax return, you should keep comprehensive records to support all the figures you’ve reported. HMRC can request these records if they open an enquiry into your return.
Essential Records to Keep:
- Income Records:
- P60 from your employer (shows total pay and tax deducted)
- P11D or P9D (if you received benefits in kind)
- P45 if you left a job during the year
- Invoices and receipts for self-employment income
- Bank statements showing interest received
- Dividend vouchers or investment statements
- Rental income records (if you’re a landlord)
- Expense Records:
- Receipts for business expenses
- Mileage logs (if claiming business mileage)
- Records of home office expenses
- Invoices for professional services
- Receipts for equipment purchases
- Records of pension contributions
- Charitable donation receipts (for Gift Aid claims)
- Other Important Documents:
- Your completed 2018-19 tax return (SA100) and any supplementary pages
- Calculations showing how you arrived at your figures
- Correspondence with HMRC about your tax affairs
- Records of any tax payments you made
- Bank statements (personal and business)
- Contracts and agreements related to your income
How Long to Keep Records:
For 2018-19 tax returns, you must keep your records until at least:
- 31 January 2025 – This is 5 years from the normal filing deadline of 31 January 2020
- If you filed your return late, keep records for 5 years from the date you actually filed
- If HMRC has started an enquiry, keep records until the enquiry is completed
- If you’re self-employed or a landlord, it’s good practice to keep records for at least 6 years
Record Keeping Tips:
- Organize records by category (income, expenses, etc.)
- Keep digital copies as backup (scans or photos of receipts)
- Use accounting software to track income and expenses
- Note the business purpose on receipts where it’s not obvious
- Keep a mileage log if you claim business travel
- Store records securely (consider cloud storage with encryption)
What Happens If You Don’t Keep Records?
If HMRC opens an enquiry and you can’t provide adequate records:
- They may disallow expenses you’ve claimed
- They could estimate your income (often higher than actual)
- You might face penalties for inaccurate returns
- It becomes harder to appeal HMRC decisions
How does the Marriage Allowance work for 2018-19 and can I still claim it?
The Marriage Allowance allows lower-earning partners to transfer part of their personal allowance to their higher-earning spouse or civil partner, potentially reducing their tax bill by up to £237 for the 2018-19 tax year.
Eligibility Criteria for 2018-19:
- You must have been married or in a civil partnership during the tax year
- The lower earner’s income must have been £11,850 or less
- The higher earner’s income must have been between £11,851 and £46,350 (basic rate taxpayer)
- Both partners must have been born on or after 6 April 1935
How It Works:
- The lower earner transfers 10% of their personal allowance (£1,185) to the higher earner
- This increases the higher earner’s personal allowance to £13,035
- The higher earner saves tax at 20% on the transferred amount (£1,185 × 20% = £237)
- The lower earner’s personal allowance is reduced to £10,665
How to Claim for 2018-19:
You can still claim the Marriage Allowance for 2018-19 until 5 April 2023. Here’s how:
- Go to the GOV.UK Marriage Allowance service
- Register or sign in with your Government Gateway ID
- Provide both partners’ National Insurance numbers
- Confirm your identities (you might need payslips or P60s)
- Submit the application – HMRC will adjust your tax codes automatically
Backdating Claims:
You can backdate your claim to include any tax year since 2015-16 where you were eligible. For 2018-19:
- You’ll receive the £237 tax saving as a refund
- The refund will be paid to the higher earner
- If you claim for multiple years, you’ll receive a refund for each eligible year
Important Notes:
- You can’t claim if either partner was a higher or additional rate taxpayer
- The allowance must be claimed by the lower earner
- If your circumstances change (e.g., divorce, death), the allowance stops
- You can cancel the allowance if your situation changes
- The allowance is automatically renewed each year until cancelled
Example Calculation:
If in 2018-19:
- Partner A earned £10,000 (below personal allowance)
- Partner B earned £30,000 (basic rate taxpayer)
- They claim Marriage Allowance
Result:
- Partner A’s personal allowance reduces to £10,665 (but they only earn £10,000, so no tax impact)
- Partner B’s personal allowance increases to £13,035
- Partner B’s taxable income reduces by £1,185
- Tax saved: £1,185 × 20% = £237
What should I do if I think I paid too much tax in 2018-19?
If you believe you overpaid tax in 2018-19, you can claim a refund. Here’s a step-by-step guide to recovering overpaid tax:
1. Check Your Position:
- Use this calculator to estimate if you’re due a refund
- Review your P60, P45, or self-assessment return for 2018-19
- Check your tax code – common errors include:
- Wrong personal allowance
- Outdated information from previous years
- Missing adjustments for benefits or expenses
2. Common Reasons for Overpayment:
- You were on an emergency tax code (e.g., 1185 W1/M1)
- You had multiple jobs and paid too much tax
- You made pension contributions that weren’t accounted for
- You had work expenses that weren’t claimed
- You were made redundant and paid too much tax on your final pay
- You stopped working partway through the year
- You’re eligible for Marriage Allowance but didn’t claim it
3. How to Claim a Refund:
If you’re employed (PAYE):
- Check your tax code and P60/P45
- Contact HMRC:
- Online: Use your Personal Tax Account
- Phone: 0300 200 3300 (have your NI number ready)
- Post: Write to HMRC with details of why you think you overpaid
- Provide evidence (payslips, P60, etc.)
- HMRC will review and either:
- Send you a refund (usually within 4-6 weeks)
- Adjust your tax code to refund the amount through your salary
If you’re self-employed or file a tax return:
- File your 2018-19 tax return if you haven’t already (you have until 5 April 2023)
- Include all income and expenses accurately
- HMRC will calculate if you’re due a refund
- If you’ve already filed, you can amend your return online
- Refunds are typically paid within 4-8 weeks of filing
4. Time Limits:
- You have until 5 April 2023 to claim a refund for 2018-19
- After this date, you generally lose your right to claim
- For PAYE refunds, there’s no strict time limit, but it’s best to claim as soon as possible
5. What to Include in Your Claim:
- Your full name, address, and National Insurance number
- Your employer’s name and PAYE reference (if employed)
- Details of why you think you overpaid
- Copies of relevant documents (P60, payslips, etc.)
- Bank details for the refund (if not already held by HMRC)
6. If HMRC Rejects Your Claim:
- Ask for a detailed explanation of their decision
- Check their calculations carefully
- Provide additional evidence if available
- Consider using a tax advisor if the amount is significant
- You can appeal to the tax tribunal if necessary
7. Interest on Refunds:
HMRC pays interest on refunds (called “repayment interest”) at the Bank of England base rate plus 0.5%. For 2018-19 refunds claimed in 2023, this would be approximately 3.75% interest.