Making Tax Digital · Sole traders
High Income Child Benefit Charge: why adjusted net income matters under MTD
ONLY£15A MONTHThe figure that triggers MTD is not the figure used for the High Income Child Benefit Charge.
The figure that triggers MTD is not the figure used for the High Income Child Benefit Charge. MTD generally looks at qualifying business and property income before expenses. The Child Benefit charge looks at an individual's adjusted net income, which includes a wider range of taxable income and certain reliefs.
The £60,000 to £80,000 range
HMRC's current Child Benefit guidance says the charge starts above £60,000 adjusted net income and reaches the full Child Benefit amount at £80,000. The calculation repays 1% for each £200 above the starting threshold.
Where both partners are above the threshold, the higher adjusted net income determines who pays. This is not a household-income total. Check the partner and Child Benefit rules for the actual family circumstances.
Adjusted net income is calculated before Personal Allowances and after certain reliefs, including qualifying pension and Gift Aid adjustments. Do not subtract the Personal Allowance first or treat gross turnover as the answer. HMRC explains adjusted net income.
Quarterly business updates do not settle the complete charge. Someone already required to file Self Assessment should deal with the charge through the appropriate annual-return process.
Worked example: different thresholds, different results
Assume qualifying turnover is £85,000 and allowable costs leave £58,000 profit. With no other relevant income or adjustments, the person may be within MTD but below the Child Benefit charge threshold.
If adjusted net income is instead £70,000, the excess is £10,000. Dividing by £200 gives 50%, so the charge is half the relevant Child Benefit amount. The family's actual income and reliefs must be checked before using that result.
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.
Keep the evidence connected to the figures
Your digital record should explain the amount, date and nature of the transaction. Keep the invoice, receipt, statement or other evidence that supports it. A photograph can make a paper document easier to retain, but a folder of photographs alone does not create complete transaction records.
For sole traders, HMRC normally requires business records to be kept for at least five years after the relevant 31 January filing deadline. Keep them longer where the rules for a late return, enquiry or other circumstances require it. Check the record-retention guidance.
Make the records usable by your future self. Include a short explanation where a bank description is vague, retain the calculation behind a business-use split and make corrections traceable. For a missing receipt, try the supplier account, email confirmation or a replacement invoice before relying on incomplete evidence.
At review time, compare your records with the bank or payment account and investigate differences. Equal totals are useful, but two errors can cancel each other out. A sample of individual transactions can reveal a duplicated purchase or an omitted customer receipt that a totals-only check misses.
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.
Review the whole personal picture
Collect employment, savings, property and pension information, and check which partner has the higher adjusted net income. Keep pension contributions separate from business expenses. If considering opting out of Child Benefit payments, understand the distinction between payments and registration for National Insurance credits.
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.