One of the most common misconceptions we come across is the assumption that the MTD for Income Tax threshold works like a profit calculation. That if you earn £60,000 in rent but have £15,000 in allowable expenses, your net position of £45,000 keeps you below the line.

It does not work that way.

HMRC measures your qualifying income on a gross basis. That means the total amount coming in before any deductions, expenses, or allowances are applied. If your gross rental receipts exceed £50,000, you are in scope for MTD for Income Tax from April 2026. What you are left with after expenses is irrelevant to the threshold question.

Why this catches people out

Property investors in particular tend to think in net terms. You receive rent, you pay your mortgage, your agent fees, your insurance, your maintenance costs. What you actually pocket might be a modest amount. But HMRC is not asking what you pocketed. It is asking what came through the door.

A landlord receiving £52,000 in gross rent who has £20,000 in allowable expenses and ends up with £32,000 taxable profit is still firmly in scope for MTD. The £32,000 profit figure is relevant to their tax calculation. The £52,000 gross figure is what determines whether MTD applies at all.

The same logic applies to self-employed income. A sole trader with £55,000 in gross receipts but £18,000 in business costs is above the threshold regardless of their net profit position.

What counts as qualifying income

Qualifying income for MTD purposes is the combined gross income from self-employment and property. If you have both, those figures are added together before the threshold test is applied.

A landlord with £30,000 in rental income and a self-employed trade turning over £25,000 has qualifying income of £55,000. Both income streams count. Both are measured gross.

Income from employment, pensions, savings interest, and dividends does not count toward the MTD threshold. The test is specifically about self-employment and property income.

The £30,000 threshold coming in April 2027

From April 2027 the threshold drops to £30,000 gross qualifying income. This will bring a significant number of additional landlords and sole traders into scope who currently sit below the £50,000 line.

If your gross income is between £30,000 and £50,000, you are not in scope today but you will be in twelve months. The time to get your records in order and understand the software requirements is now, not in March 2027.

What you should do

If you are unsure whether your gross income exceeds the threshold, look at your last Self Assessment return. The figure that matters is your total property or self-employment income before expenses are deducted - not your taxable profit, not your tax bill, not your take-home figure.

If that number is above £50,000, MTD applies to you from April 2026. If it is between £30,000 and £50,000, it applies from April 2027.

Software like DoneSE and DoneTax connects to your bank via open banking, pulls your transactions automatically each quarter, and handles the HMRC submission directly. The gross income question is one you only need to answer once to know where you stand. The quarterly process after that is straightforward.