UK Timely Payments Consultation Closed: What Self Assessment Taxpayers Watch Next

HMRC’s consultation on Timely Payments in Income Tax Self Assessment (ITSA) closed at 11:59pm on 4 August 2026. The six-week paper, opened on 23 June 2026 after Budget 2025, asked how Self Assessment taxpayers with PAYE income should start paying towards their Self Assessment bill through regular PAYE deductions from April 2029.

As of mid-August the government has not published final rules. The official factsheet confirms a summary of responses will appear in autumn 2026, with any relevant legislation expected in a Finance Bill ahead of April 2029 implementation. Sole traders, company directors with salary plus Self Assessment income, landlords, and pensioners on ITSA should watch that response — not rebuild cash-flow models on consultation text alone.

What the closed consultation proposed

Around 12 million people file a Self Assessment return each year; about 7 million also have PAYE income from employment or a pension. Tax on PAYE is collected monthly, while Self Assessment income can be paid up to 22 months after it is earned. HMRC notes roughly one in five ITSA bills are paid late, with debt costs from penalties and interest.

From April 2029, the government intends that ITSA taxpayers with enough PAYE income will contribute to their Self Assessment liability through tax-code adjustments where possible. No one is meant to pay more tax overall — only earlier and in smaller instalments. Taxpayers would still file a return by 31 January and settle any remaining balance. The paper also explored more frequent Payments on Account for taxpayers without enough PAYE income, without deciding that track yet.

What to do while waiting for the autumn response

Keep digital records strong under Making Tax Digital for Income Tax. Timely payments are separate from MTD quarterly updates, but HMRC frames both as complementary — better in-year visibility supports smoother collection design.

Model cash flow for directors and side-income earners who currently rely on January and July lump sums. If carried interest or other lumpy receipts sit in Self Assessment, note that stakeholders flagged irregular income during consultation — watch whether the autumn response addresses safeguards for fluctuating income.

Do not change payroll engines or tax-code assumptions for April 2029 until draft legislation and guidance appear. Use the intervening months to tighten expense coding and estimate packs so any future in-year collection has clean source data.

How FinnAccountings helps with Self Assessment prep

Organised income and expense categories make Self Assessment and MTD packs easier to review while policy design continues. FinnAccountings helps Ireland and UK businesses prepare bookkeeping and tax packs with Chartered Accountant insight before you or your ICAEW/ACCA or Chartered Accountant (Ireland) adviser files. Start a free trial for review-ready drafts — we prepare records; we do not collect tax through PAYE or file Self Assessment returns to HMRC on your behalf.

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Related reading

For the original June consultation briefing, read the Timely Payments overview published when the paper opened.

UK ITSA Timely Payments consultation overview →

Carried interest now taxed as trading profits interacts with payment timing — keep that April 2026 change on the same planning board.

UK carried interest as trading profits from April 2026 →

Use the dual-market tax calculator for high-level Income Tax and National Insurance planning only — not an in-year collection forecast.

Open free tax calculator (Ireland & UK) →