Gross turnover vs profit: why £50k revenue triggers MTD

You invoice £65,000 over the year. Materials, vehicle costs and other business expenses use £35,000 of it. That leaves £30,000 before personal tax, so a £50,000 Making Tax Digital threshold might seem irrelevant.

For MTD, however, those costs usually do not reduce the amount used to decide whether you must join. The first mandatory phase looks at qualifying income before expenses, rather than the profit available to live on.

Understanding that difference is especially useful if you work in a trade where a substantial part of every customer payment goes straight back out to suppliers.

Turnover and profit answer different questions

Turnover tells you about the income generated by your business. Profit tells you what remains after the relevant business costs have been deducted.

Both figures matter, but they have different jobs. Your MTD entry test uses qualifying income. Your eventual Income Tax calculation depends on taxable profits, other taxable income, reliefs and your personal circumstances.

The legal definition and calculation rules appear in regulations 25 and 26 of the Income Tax (Digital Obligations) Regulations 2026. HMRC’s practical explanation is that qualifying income is your total self-employment and property income before expenses, with specific rules for particular circumstances.

For the first mandatory year, the relevant comparison is more than £50,000 of qualifying income in 2024/25. It is not a test of your 2026/27 profit forecast. Check which year and threshold apply.

Worked example: an electrician with £30,000 profit

Imagine Sam is a sole trader electrician. His business continued into April 2026, and he has no applicable exemption.

For this simplified example, all £65,000 of invoices were paid during 2024/25, Sam uses the cash basis, and the £35,000 costs are allowable revenue expenses. There are no VAT complications or additional tax adjustments.

Sam must generally use MTD from 6 April 2026 because his qualifying income exceeds the threshold. His £30,000 profit does not take him outside the rules.

This does not mean he pays Income Tax on £65,000. The expenses still matter when calculating taxable profit. MTD changes how records and information are supplied; it does not turn ordinary deductible costs into taxable profit.

HMRC’s allowable expenses guidance explains the distinction between turnover, business costs and taxable profit.

Why bank deposits can give you the wrong answer

Looking only at money arriving in your bank account can produce a misleading income total.

A letting agent might collect £1,200 of rent, retain a £120 management fee and transfer £1,080. Ordinarily, the records need to show the £1,200 income and the £120 expense separately. Recording only the deposit hides part of both.

The same issue arises where a payment processor deducts charges before settling sales. A bank transfer is evidence of what reached the account, but it may not describe the full underlying transaction.

Conversely, moving £2,000 from your savings into your business account is not automatically turnover. Nor is every loan receipt or refund a new customer sale. The source and purpose of the money matter.

Use the business and property figures reported on your return as your starting point, then check that you understand how they were calculated. A quick sum of all bank credits is not a reliable substitute.

Combine your own qualifying income sources

The threshold is assessed across your relevant self-employment and property income. It is not a separate £50,000 allowance for every activity.

Consider these simplified full-year examples for 2024/25:

These examples assume no special adjustment or exemption. They also show why the headline “earn £50k” is too imprecise: employment salary is different from qualifying business and property income.

Your spouse’s separate trade is not automatically added to yours. The test concerns your income, rather than a household’s combined earnings.

Joint property and other important exceptions

Your share of jointly owned rent

If you are entitled to half the income from a property producing £28,000 of annual rent, your starting share is £14,000, rather than the whole £28,000. Add that to your own other qualifying income.

HMRC also has a specific approach where a joint owner is only notified of their share after expenses have been deducted: its guidance says it assesses that notified figure for qualifying income. This is a particular rule, not permission for every landlord to deduct expenses from the threshold calculation. Read HMRC’s qualifying income rules.

The entitlement to jointly owned income must itself be correct. HMRC’s Property Income Manual on who receives property income provides the underlying context. Ownership, entitlement and the applicable tax rules matter more than which account receives the payment.

Accounting basis and VAT

Invoice totals and cash receipts are not always the same. Under the cash basis, income is generally recorded when received. Traditional accounting can recognise income before payment. HMRC’s Business Income Manual cash basis section explains that framework.

If you use the cash basis and are VAT registered, HMRC says VAT counts towards qualifying income where you have chosen to include it in the business income declared. Short accounting periods may also need annualising. Check the detailed guidance before assuming a figure just below the threshold is decisive.

What if your income has fallen?

A quieter current year does not automatically undo an earlier entry requirement. Likewise, ceasing one activity may not remove the effect of its earlier income if another qualifying activity continues.

If your return was wrong, all your activities have ceased, or your circumstances have changed, investigate the relevant HMRC process. Correct the underlying position instead of simply deciding to stop submitting.

For planning, the next scheduled entry thresholds are more than £30,000 in 2025/26 for April 2027 and more than £20,000 in 2026/27 for April 2028. These are separate tests from the first £50,000 phase.

Make the right figure easy to find

Keep sales, expenses, personal transfers and each income source clearly identifiable. That makes the MTD threshold easier to check and leaves you with better information about your actual profit.

Avona.app costs £15/month and helps organise bank transactions and imported records, with Avona AI supporting categorisation. Start by checking your relevant tax return and confirming the income sources you need to manage.

You do not need to earn £50,000 of profit to be affected by MTD. Once that distinction is clear, the next step becomes much more straightforward.