The annual ritual of stuffing receipts into a shoebox and scrambling to file a self-assessment return by 31 January is, for hundreds of thousands of self-employed people, about to become a thing of the past. What replaces it will be considerably more demanding.
From April 2026, sole traders and landlords with income above £50,000 will be required to submit quarterly updates to HMRC through Making Tax Digital-compatible software. Rather than one annual return, they will need to keep digital records throughout the year and file summaries every three months.
The penalty regime is sharp enough to concentrate minds. Miss a quarterly deadline and HMRC will issue an immediate £100 fine. If the return is still outstanding after three months, daily penalties of £10 begin to accumulate, up to a maximum of £900. Leave it longer than six months and the charge rises to £300 or five per cent of the outstanding tax, whichever is greater.
For the self-employed plumber, freelance designer or buy-to-let landlord who has managed their own tax affairs for years, this represents a fundamental change in habit. The days of reconstructing a year’s finances from bank statements and memory in late January are over. HMRC wants near-real-time visibility of trading income and expenses, and it is prepared to fine people who cannot keep up.
The practical burden falls heavily on smaller operators. Larger businesses already running cloud accounting packages such as Xero, QuickBooks or FreeAgent may find the transition relatively painless, most of these platforms are already MTD-compatible or will be by April. But the sole trader who tracks income on a spreadsheet, or worse still on paper, faces a steeper learning curve and the cost of new software subscriptions.
Accountants report that awareness among their smaller clients remains patchy. Many assume the change applies only to VAT-registered businesses, which have been filing quarterly under MTD since 2019. It does not. This is a separate obligation covering income tax, and it will eventually extend to those earning above £30,000 from April 2027 and £20,000 from April 2028.
The advice from tax professionals is consistent: do not wait until April to act. Choose MTD-compatible software now, start recording income and expenses digitally from the beginning of the new tax year, and build the quarterly filing into your routine before the first deadline arrives. The cost of software, typically between £10 and £35 a month, is tax-deductible, which takes some of the sting out.
For small business owners who also hold rental property, the picture is more complex still. Income from self-employment and property lettings may need to be reported through the same MTD system, and the interactions between the two can catch people out.
HMRC has positioned Making Tax Digital as a modernisation programme that will reduce errors and close the tax gap. For the self-employed, it feels more like an administrative step change that demands better record-keeping, better software and, for many, a closer relationship with their accountant than they have been used to.
