HMRC use Self Assessment to calculate the tax on your income. It’s one type of Income Tax return that often applies to self-employed people. Tax is usually deducted automatically from wages, pensions, and some savings and investment income, but if you receive further income, it’s important to report this to HMRC by sending an Income Tax Self Assessment return each year. Using software to help manage your business accounting for Self Assessment can help ensure your Income Tax return is submitted correctly and on time. Get your Income Tax Self Assessment return sorted in three simple steps and start the new tax year with confidence.
From April 2026 if you have an income of over £50,000 annually, from self employment, you'll need to use MTD compatible software to:
Digital records are a simple and secure way to store your financial records in one place:
*Only available in Accounting Standard and Accounting Plus
Save time and avoid mistakes with automated processes that simplify preparing for Self Assessment:
Everything from Accounting Standard and:
Want to try before you buy? Skip the offer and start with a 1 month free trial.
*Get 50% off for 3 months, then £15/£30/£39 + VAT/mo (tier depending). Terms and conditions apply.
If you need a simple solution to manage income and expenses for tax compliance, without quoting, invoicing or VAT, see our Individual plans.
You must submit your online Self Assessment tax return by 31 January for the previous tax year, and you must register by 5 October in your second year of operation. However, there are other key dates you should be aware of;
When? - What do I need to do?
For more information, and to learn more about which deadlines are applicable to you and your business, please visit: https://www.gov.uk/self-assessment-tax-returns/deadlines
You need to send an Income Tax return if (in the last tax year) you (including, but not limited to):
Find out more about the latest guidance on who needs to send an Income Tax return.
If you're looking for software for Self Assessment our plans have you covered. All 3 packages (Start, Standard, and Plus) give you the fundamental features you need to manage your accounting, including your tax returns.
Have simpler needs?
To accurately fill in your Income Tax return, it’s important to keep records of:
To effectively keep track of key information in preparation of your Self Assessment, you can use software like Sage Accounting to centralise, digitise, and automate the capture of important data so that it’s easier and clearer to fill out your Income Tax return.
Sage Accounting helps you capture, categorise, and automate data for your Income Tax Self Assessment return in one place. Get ready for the 31 January deadline today by keeping digital records and optimising your self-employment income with Sage Accounting.
All of our customers get free, award-winning support by phone, email, and online chat.
You will also get 24/7 access to the following support resources:
Get articles, insights, and tips to help with your preparations for Self Assessment from Sage Advice, our business blog.
Access everything you need to help automate and streamline workflows, drive your practice forward and delight your clients with Sage for Accountants.
Give Feedback