Self Assessment Deadlines, Payments on Account and Personal Tax Records Checklist

A personal tax calendar and checklist – Self Assessment deadlines, payments on account and how to reduce them, the balancing payment, penalties for late filing and late payment, what records to keep and for how long, and a year-end information checklist for your accountant.

Editable Word document
4
10pages
Guidance notes included
aml consultancy solutions

Letters to HMRC & personal tax

Self Assessment Deadlines, Payments on Account and Personal Tax Records Checklist

About this document

What it’s for

Missing a Self Assessment deadline is costly. This checklist sets out the key dates and the records you need, so you can prepare in good time – whether you complete your own return or pass the information to an accountant.

When to use it

  • At the start of each tax year
  • When gathering information for your tax return
  • If you expect your income to fall and want to reduce payments on account

What’s inside

The document is laid out in the sections below. Each one comes with a plain-English guidance note explaining what it does and what to change.

A complete, ready-to-use document with every section written, your details shown in [square brackets], and guidance notes explaining how to complete it.

How to complete it

  • Diarise the deadlines for the year
  • Tick off the information as you collect it
  • Keep records for the periods shown

Key points to check

  • Making Tax Digital for Income Tax applies from April 2026 for those with qualifying income over £50,000, and from April 2027 over £30,000 – check whether it applies to you
  • Reducing payments on account too far will lead to interest on the shortfall

Our templates are professionally structured starting points for UK businesses, not legal advice. For anything complex, unusual or high-value, have your final version checked by a solicitor.

Included in the pack

Letters to HMRC & personal tax

From £29

for every document in this category

Editable Microsoft Word files

Guidance notes in every document

Written for UK businesses

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