Self Assessment for company directors and dividends

Directors file because of untaxed income, not the role itself

HMRC scrapped the old rule that being a company director automatically pulled you into Self Assessment years ago. The current position is simple: if every penny of your director income runs through PAYE and there's nothing else to declare, you don't have to file. The moment you take dividends above the £500 allowance, receive a benefit not handled through payroll, or have any other untaxed income, you do (GOV.UK — Self Assessment).

For most directors of their own company that distinction is academic — the whole point of running a limited company on a low-salary-plus-dividends basis is that the dividends sit above the £500 allowance, which means a return is due. But the rule still matters at the edges: a non-executive director paid only a small fee through PAYE, or a director who hasn't yet started drawing income, isn't automatically in.

What actually goes on the return

For a typical owner-director extracting income from their own company, the return covers three layers:

• Salary — usually already taxed through PAYE. You enter the gross figure from your P60 and the tax already deducted; the system reconciles it. No extra tax is normally due on this slice.
• Dividends — gross amount paid in the tax year, entered in the UK dividends section. The system applies the £500 dividend allowance and taxes the excess at 10.75% / 35.75% / 39.35% depending on band (GOV.UK — Tax on dividends).
• Other income — savings interest, property income, foreign income, Capital Gains, pension contributions, charitable giving. Each has its own supplementary section.

The dividend tax is the headline number for most director returns. PAYE has already done its job on the salary; Self Assessment exists to pick up everything PAYE doesn't see — and dividends are the biggest item in that bucket for a typical director (GOV.UK — Taking money out of a limited company).

Payments on account apply to dividend tax too

Directors often think payments on account are a self-employed problem. They aren't. Any Self Assessment bill over £1,000 — where less than 80% of your tax was collected at source — triggers them, and dividend tax is exactly the sort of bill that does. A director taking £40,000+ in dividends will typically owe several thousand pounds in dividend tax, and the next year's payments on account ride on top.

The arithmetic is the same as for anyone else: this year's balancing payment plus 50% of it again as the first payment on account, both due 31 January, then another 50% due 31 July. So a £3,000 first-year dividend-tax bill becomes £4,500 due in January — the “1.5x” first-year shock the payments-on-account spoke walks through in detail.

For the worked example and the SA303 route to reduce the payments if income is genuinely going to drop, see Payments on account — why your first tax bill can feel double.

The MTD interaction — what changes from 2026/27

Making Tax Digital for Income Tax doesn't replace Self Assessment for directors. MTD applies to trading and property income for individuals with qualifying income over £50,000 in 2026/27 (then £30,000 in 2027/28, £20,000 in 2028/29). Dividends from your own limited company are not trading or property income — they sit on the personal-tax side and are reported through the normal Self Assessment route, regardless of MTD.

The interaction matters if you wear two hats. A director who also has a sole-trader sideline above £50,000 of turnover, or a director-landlord with significant rental income, will be doing MTD quarterly updates for the trade/property income and filing for the dividends. The dividend reporting stays where it is. For the full picture of who's in MTD when, see Making Tax Digital for Income Tax — the 2026/27 guide.

The connection to how you pay yourself

The dividend figure on your Self Assessment is the direct result of the salary/dividend split you chose at the start of the year. Planning the split — how much salary, how much dividend, how much pension, when to cross into the higher-rate band — and filing the return that reports it are two halves of the same job. Get the split wrong and the return is just the bill arriving.

For the full peer cluster on getting the split right under the 2026/27 rates, start at Salary vs dividends — the 2026/27 pillar and run your own numbers in the Salary vs Dividend Optimiser before the next dividend round. To estimate the dividend-tax bill you're heading toward, the Self Assessment tax calculator gives a 2026/27 figure.

The takeaway — two halves of the same job

For an owner-director, the salary/dividend decision and the Self Assessment return are the same conversation twelve months apart. Plan the split with the right rates and the right Employment-Allowance assumption, file the return cleanly, flag the payments on account before they bite. That's the job — and it's exactly what RR's Limited Company Accountants service handles end to end.