abc self assessment

Self Assessment

ABC SA100 & ABC SA800

HMRC Self Assessment made easy

Simple-to-use software to submit your personal or partnership tax return
ABC SA100 - for individuals ABC SA800 - for partnerships

First time? See our Guide for first time users
Happy customer

ABC SA100 Individual tax return

  • For a better experience than the HMRC website
  • Ideal for:
    • UK taxpayers living overseas
    • Individuals with income from a trust
    • Ministers of Religion
  • £16+VAT per individual

ABC SA800 Partnership tax return

  • Submit the tax return for a partnership
  • Partners can be sent their partnership statement to import in to their personal return
  • £22+VAT per partnership
Simple to use

Simple to use

  • Work through the entire form using the 'Next' button
  • The sections you need are automatically added, based on your responses
  • Omissions or errors are highlighted as you go, but you can come back to them later
  • Context-sensitive help takes you directly to the relevant part of the HMRC notes
Know where you stand

Know where you stand

  • Clear progress indicator
  • Exit the app at any time and continue where you left off
  • Displays a 'running total' of tax based on your entries so far - with a printable breakdown of how that is reached
  • Export to .pdf at any point - so you can print or share (requires activation)


  • Officially recognised by the HMRC for individual and partnership tax filing
  • Private, local install - your personal data is only stored on your computer and is submitted direct to the HMRC. No financial data is stored 'in the cloud', and data is only sent to the HMRC when you submit

Recent feedback from customers

"Excellent. I was cynical as having to do this as now working abroad. Simplest system I have had to use really made the pain of tax form completion simple. Excelent piece of software. Will purchase next year if i have to complete next year”

– KRg

"Very user friendly for expat tax thanks and saved me 300 pounds compared to paying a consultant. However, I did copy some of their answers from the previous year!!”

– AE

"Been using this software for several years now - makes filing easypeasy - worth every pence ”


"this is a very easy way of submitting my return! i have tried a fee different ones that are much more complicated”

– AS

"Very good if I can use it anyone can I have used several time and ABC staff very helpful "

– DMBrown

"Brilliant. I use this every year as I live overseas and I have recommended it to lots of people who have been very happy with it.”

– anon