Making Tax Digital · Sole traders
Marriage Allowance and MTD: where the personal tax relief fits
ONLY£15A MONTHMarriage Allowance can reduce an eligible couple's overall Income Tax bill, but it is a personal relief rather than a business expense.
Marriage Allowance can reduce an eligible couple's overall Income Tax bill, but it is a personal relief rather than a business expense. Keeping quarterly business records does not replace checking the couple's annual eligibility or making the necessary claim.
Check both partners' circumstances
Marriage Allowance allows an eligible person to transfer £1,260 of Personal Allowance to a spouse or civil partner, reducing the recipient's tax by up to £252. The lower earner normally has income below their Personal Allowance, and the recipient must meet the relevant tax-rate condition.
For Scotland, the eligible recipient rates differ from the rest of the UK. Living together without marriage or a civil partnership is not enough. Savings, dividends and other income can make the eligibility check less straightforward than comparing two business-profit figures.
Calculate the benefit for the couple
Transferring allowance can increase the transferor's own tax, so the recipient's maximum reduction is not always the couple's net saving. Review the full position, especially where the lower earner's income is close to the Personal Allowance.
An existing transfer normally continues until cancelled. Changes in income or circumstances should prompt a review rather than an assumption that the previous year's claim remains beneficial.
Worked example: a straightforward eligible couple
Alex has £10,000 income and Sam has £30,000, with no complicating income or reliefs. Assuming they meet all the conditions, Alex's reduced allowance still covers that £10,000, while Sam can receive a tax reduction of up to £252.
If Alex's income rises, calculate the effect on both partners again. A £252 reduction for Sam does not necessarily mean the couple saves £252 overall.
Treat a tax estimate as a forecast
A bookkeeping profit is not necessarily your final taxable income, and an estimated liability is not always the amount still to pay. Employment income, pensions, savings, reliefs, tax already deducted and payments on account can all affect the final position.
An estimate is most useful when you understand its coverage. Check whether it uses year-to-date figures or projects a full year, whether all income sources are included and whether adjustments are still outstanding. A strong summer followed by a quiet winter should not automatically be projected as twelve identical months.
HMRC explains that estimates after quarterly updates can be incomplete when other income is missing or accounting periods do not align with the tax year. Read the estimate guidance within quarterly reporting.
Use a reviewed forecast to inform a cash reserve, then compare it with actual HMRC liabilities and payment dates. If you transfer money into a tax savings account, that transfer is not a business expense. If an estimate changes sharply, investigate the records and assumptions before assuming that your tax position itself has changed by the same amount.
Where this fits into Making Tax Digital
For 2026/27, the first mandatory phase generally covers individuals whose combined qualifying self-employment and property income was more than £50,000 in 2024/25, subject to exemptions. Qualifying income normally means income before expenses. It is a different figure from taxable profit. Check the qualifying-income rules.
Once within MTD, keep the required digital records and send quarterly summaries for each relevant business. The summaries are cumulative from the start of the reporting year. They do not contain your entire personal tax position, and sending one does not itself create a quarterly tax-payment demand.
HMRC does not require accounting or tax adjustments before each quarterly update. Those adjustments and the other information needed for the annual return still have to be completed at the appropriate stage. Keep a review list so a matter deferred until year end is not forgotten. Read HMRC's quarterly-update guidance.
Software can organise the information, but the business facts remain essential. Review the figures you approve rather than assuming that a successful import has also settled every tax question.
A review that checks more than the total
Start with coverage: the correct person, business and period, plus all relevant accounts and cash records. Then look at completeness. A feed can be connected today while still missing an earlier week. Confirm the earliest and latest transactions against the source.
Next, inspect unusual items. Large transfers, loan receipts, refunds, net settlements and private purchases often need more context than a bank description provides. Check for duplicate imports where a statement overlaps a live feed. An automatic warning is useful evidence to investigate, not proof that the entry must be removed.
Finally, review category totals. A category unexpectedly showing zero, a large increase or a negative amount deserves an explanation. You do not have to make every annual tax adjustment at this stage, but you should understand the records behind the summary you approve.
HMRC explains what quarterly updates contain. Keep the approved version and the resulting acknowledgement together. If something later changes, correct the source record and use the software's supported update process so you can explain which figures are current.
Keep the relief out of expense categories
Record business transactions normally and deal with Marriage Allowance through the personal tax process. Check any prefilled annual-return information and tell your adviser about both partners' relevant circumstances. Do not enter the transferred allowance as a payment from the business.
Take the next step
Avona.app offers a self-service route from £15/month. Bring your records together, review the figures and choose a workflow that fits your business. For professional help, discuss the scope and total price of Avona Concierge, managed by chartered accountants, before choosing a service.