AIS 2026 Help Centre
Practical, plain-English help for running a UK business in AIS—checked against current HMRC guidance and adapted from established accounting-software workflows.
General guidance only. Check your HMRC account and obtain advice for decisions specific to you.
Getting started
1 guidePersonal tax
2 guidesSelf Assessment for 2025/26
Prepare the return due in January 2027, including director salary, dividends, other income and payments on account.
Read guideMaking Tax Digital for Income Tax from April 2026
Who enters MTD Income Tax first, what digital records mean and the first quarterly update dates.
Read guideCompany tax
3 guidesCorporation Tax and Company Tax Returns
Understand the 19% and 25% rates, marginal relief and the different payment and filing deadlines.
Read guideVAT returns and Making Tax Digital in 2026
Check whether registration is required, review the nine-box return and meet the usual submission and payment date.
Read guideLimited company year-end checklist
Close the books cleanly before accounts, Corporation Tax and Companies House filings are prepared.
Read guideMoney out
1 guideExpenses
1 guideUse the guides with your live AIS deadlines
Your organisation dashboard applies the relevant dates to your own accounting periods.
Start using AIS