Taxation (UK) · The comprehensive computation of taxable income and income tax liability

Marriage Allowance and Tax Reducers in TX-UK

Updated 11 October 2026 · Fact-checked

Marriage allowance lets one spouse or civil partner transfer £1,260 of personal allowance to the other, giving a tax reduction of £252 if conditions are met. Tax reducers such as EIS, SEIS and VCT relief are deducted from the income tax liability, after tax is calculated, and cannot create a refund.

Understand Marriage Allowance, Married Couples and Tax Reducers

Most income tax reliefs work by reducing income before tax is calculated. A tax reducer is different. You calculate the full income tax liability first. Then you subtract the reducer from that liability. This is the key difference between a deduction from income and a tax reducer.

Marriage allowance is a transfer of part of one person's personal allowance. The ACCA tax tables give the transferable amount as £1,260 (against a personal allowance of £12,570). The person giving up the allowance (the transferor) has their personal allowance cut by £1,260. The person receiving it (the recipient) gets a tax reduction of £1,260 × 20% = £252. It is a reducer, not a higher personal allowance.

The conditions are: the couple must be married or in a civil partnership, the transferor's income must not exceed the personal allowance (so they have no taxable income), and the recipient must not be a higher or additional rate taxpayer. If the recipient pays tax above the basic rate, no claim is possible. For the transfer to cost the transferor nothing, their income should not exceed £11,310, which is their allowance after the transfer.

EIS, SEIS and VCT are tax-efficient investments in higher-risk companies. The investor gets income tax relief as a percentage of the amount invested, given as a reducer. The usual rates are 30% for EIS, 50% for SEIS and 30% for VCT. Investments must be held for a minimum period (usually three years for EIS and SEIS, five years for VCT) or the relief is withdrawn. These reliefs are not subject to the cap on income tax reliefs, because they are reducers rather than deductions from income. Like any reducer, they cannot take the income tax liability below nil.

The rates and holding periods for these schemes are not in the extract of the tax tables used for this page. Treat them as rules to learn, and always use any figures given in the exam question.

Key rules to remember

Marriage allowance transfer: Transferable amount £1,260; recipient's reduction = £1,260 × 20% = £252; Transferor's personal allowance falls to £12,570 − £1,260 = £11,310.
Marriage allowance conditions: Married or civil partners; transferor's income does not exceed the personal allowance (no taxable income); recipient not a higher or additional rate taxpayer; If the recipient pays any tax above the basic rate, no claim is possible. The transfer costs the transferor nothing only if their income does not exceed £11,310.
EIS relief: 30% × amount invested; Tax reducer. Rate and holding period (usually three years) are rules to learn, not in the supplied tax tables. Use the figures in the question.
SEIS relief: 50% × amount invested; Tax reducer. Rate and holding period (usually three years) are rules to learn, not in the supplied tax tables. Use the figures in the question.
VCT relief: 30% × amount invested; Tax reducer. Rate and holding period (usually five years) are rules to learn, not in the supplied tax tables. Use the figures in the question.
Tax reducer treatment: Income tax liability − reducers = income tax payable (not below nil); Reducers come off the tax figure, not off income. They cannot reduce the liability below nil.
Cap on income tax reliefs: Higher of £50,000 or 25% of income; Applies to certain deductions from income. It does not apply to EIS, SEIS or VCT relief, which are reducers.

How to solve Marriage Allowance, Married Couples and Tax Reducers questions

Use this order for any computation that involves marriage allowance or investment reliefs.

1Work out each person's income and identify who, if anyone, has income above the personal allowance or is a higher rate taxpayer.
2Check the marriage allowance conditions: married or civil partners, transferor's income not above the personal allowance, recipient not above basic rate.
3Compute taxable income as normal, with the personal allowance of £12,570 (reduced by £1,260 for a transferor).
4Compute the income tax liability using the bands and rates, taxing non-savings, then savings, then dividend income.
5Calculate each tax reducer: marriage allowance £252, and EIS, SEIS and VCT as a percentage of the amount invested, using the rates given in the question or learned.
6Deduct the reducers from the liability, but never take the result below nil.
7State the income tax payable, and show clear workings for each reducer so you earn the method marks.

Quickest way: Reducer check in four moves

When to use it: Use this on objective test questions where you only need the final tax figure.

Find the basic tax liability first, ignoring the reducers.
Multiply each investment by its rate (use the rates in the question; usually 30% EIS, 50% SEIS, 30% VCT).
Add £252 if the person is the marriage allowance recipient.
Subtract the total from the liability and stop at nil if the answer would be negative.

Common mistakes in Marriage Allowance, Married Couples and Tax Reducers

Deducting EIS, SEIS or VCT investment from income before computing tax.
Many reliefs, such as pension contributions, work as deductions from income, so students treat all reliefs the same.
Fix: Compute the full tax liability first, then subtract the percentage relief from the tax.
Giving the marriage allowance recipient a £1,260 tax saving.
Students confuse the amount transferred with the tax effect.
Fix: The recipient's reduction is £1,260 × 20% = £252.
Allowing marriage allowance when the recipient is a higher rate taxpayer.
Students check the couple's marital status but forget the tax position of the recipient.
Fix: Check that the recipient is not a higher or additional rate taxpayer, and that the transferor's income does not exceed the personal allowance.
Letting tax reducers produce a negative tax figure.
Students subtract the full relief without comparing it to the liability.
Fix: A reducer cannot reduce the tax below nil. The lowest possible answer is nil.
Applying the cap on income tax reliefs to EIS, SEIS and VCT.
Students link all reliefs to the £50,000 or 25% cap.
Fix: The cap covers specified deductions from income only. Reducers sit outside it.
Forgetting the minimum holding period when asked about withdrawal of relief.
Students focus on the calculation and ignore the conditions.
Fix: Learn the holding periods (usually three years for EIS and SEIS, five years for VCT) and use any period given in the question. Selling early can lead to the relief being withdrawn.

Worked examples

Example 1

Aisha earns a salary of £48,000. Her husband Ben has income of £9,000 (earnings). They are happy to make a marriage allowance claim. Calculate Aisha's income tax liability for the year after the claim, and state the effect on Ben.

Show the solution

Check conditions: they are married, Ben's income of £9,000 does not exceed the personal allowance, and Aisha is not a higher or additional rate taxpayer because her income of £48,000 is below the higher rate threshold of £12,570 + £37,700 = £50,270. A claim is allowed.
Aisha's taxable income = £48,000 − £12,570 = £35,430.
Tax at 20%: £35,430 × 20% = £7,086 (all within the £37,700 basic rate band).
Marriage allowance reduction = £1,260 × 20% = £252.
Aisha's income tax payable = £7,086 − £252 = £6,834.
Ben's personal allowance becomes £12,570 − £1,260 = £11,310, which still exceeds his income of £9,000, so Ben pays no tax.

Answer: Aisha's income tax payable is £6,834. Ben has no liability and loses nothing.

Example 2

Priya has employment income of £70,000. She invests £20,000 in shares that qualify for EIS relief and £10,000 in a VCT. Relief is given at 30% for both investments. Calculate her income tax payable, ignoring National Insurance.

Show the solution

Taxable income = £70,000 − £12,570 = £57,430. Her income is below £100,000, so the personal allowance is not restricted.
Basic rate: £37,700 × 20% = £7,540.
Higher rate: (£57,430 − £37,700) = £19,730 × 40% = £7,892.
Income tax liability = £7,540 + £7,892 = £15,432.
EIS relief = £20,000 × 30% = £6,000.
VCT relief = £10,000 × 30% = £3,000.
Total reducers = £9,000, which is less than the liability, so the tax does not fall below nil.
Income tax payable = £15,432 − £9,000 = £6,432.

Answer: Priya's income tax payable is £6,432.

Exam tips

Write 'tax reducer' beside the relief in your working and place it below the tax liability line. Examiners look for this layout.
In marriage allowance questions, check both people's conditions before calculating anything. A short sentence on each condition earns marks.
Always finish with a check that reducers have not taken the tax below nil.
In a Section C question, show the percentage and the amount invested separately for each scheme, so a slip in one does not cost the rest.
In an objective test, read the question for the word 'payable' or 'liability'. Liability is before reducers, payable is after.

Practice questions from The comprehensive computation of taxable income and income tax liability

Marriage Allowance, Married Couples and Tax Reducers: frequently asked questions

What are the marriage allowance transfer conditions in TX-UK?

The couple must be married or in a civil partnership. The transferor's income must not exceed the personal allowance, so they have no taxable income. The recipient must not be a higher or additional rate taxpayer. The transfer is £1,260.

What is the difference between a tax reducer and a deduction from income?

A deduction from income is taken off income before tax is calculated, so it saves tax at the taxpayer's marginal rate. A tax reducer is taken off the tax liability itself, usually at a fixed percentage. Reducers cannot take tax below nil.

How much relief do EIS, SEIS and VCT give?

The usual rates are 30% of the amount invested for EIS, 50% for SEIS and 30% for VCT. These are rules to learn, as they are not in the tax tables supplied for this page. Relief is given as a reduction in the income tax liability, and you should use any figures given in the exam question.

Does the cap on income tax reliefs apply to EIS, SEIS and VCT?

No. The cap applies to certain deductions from income, at the higher of £50,000 or 25% of income. EIS, SEIS and VCT relief are tax reducers and fall outside it.