What income will be used to calculate my claim?

Updated on 14 November 2017

Tax credits are worked out using yearly rates and yearly income figures. We explain how disregards work, which year’s income is used, what to do if the estimate is wrong and what to do when your income changes.

Your income may well change from one year to the next but only changes over or under certain limits will alter the amount of tax credits you were awarded at the beginning of each tax year. The limits for changes in income from one year to the next are known as the income disregards.

To find out more about what counts as income for tax credits see our income section.

The Government is gradually introducing universal credit, a new benefit which will eventually replace tax credits, and some other social security benefits. Universal credit is being introduced geographically and in areas where the full (digital) service is available, it may no longer be possible to make a new claim for tax credits. Existing tax credit claimants are expected to be moved across to universal credit between 2019 and 2022. You can find out more about this in our universal credit section.

 

How do the disregards work?

When you first claim, you are asked for details of your household income for the previous tax year (in a joint claim, including that of your partner) and this is what your initial award is based on.

For example, if you claim on 6 July 2017 which is in the 2017-18 tax year, HMRC will ask for your income details from 2016-17.

Your claim will be based on your previous year income unless you tell HMRC during the tax year that you estimate your current year income will be different.

At the end of the tax year, HMRC ask you for details of the actual current year figures and they do a final comparison with your previous tax year income. This is how they work out exactly how much you are entitled to for the year and also whether you have been overpaid or underpaid.

Back to the top

Which year’s income is used?

For your 2017/18 tax year claim

If your income goes down by £2,500 or less when compared to your 2016/2017 income Your claim will be based on your 2016/2017 income.
If your income goes down by more than £2,500 when compared to your 2016/2017 income The income figure used will be the total of you 2017/2018 income plus £2,500.
If your income is higher than that for 2016/2017, but by no more than £2,500 Your claim will be based on your 2016/2017 income.
If you income is higher than that for 2016/2017 by more than £2,500 The income figure used will be the total of your 2017/2018 income minus £2,500.


When your tax credit award is renewed after 6 April, the initial award for the following year is once again based on your previous year income.

Back to the top

What happens if my estimate is wrong?

If you have given HMRC an estimate of your current year income because you think it will be lower or higher than your previous year income, then you need to try and make sure the estimate is accurate, otherwise you may have an overpayment if it turns out to be too low.

The £2,500 disregard for income rises only applies when comparing current year (actual or estimate) to previous year income. It does not cover rises in estimated income. For example, if your previous year's income was £15,000 and you estimate your current year's income as £10,000 but it turns out that your income is actually £12,000 – the disregard will not cover the rise between £10,000 and £12,000.

Back to the top

Do I need to tell HMRC when my income changes?

In fact, by law you do not have to tell HMRC about any income changes in-year until your claim is being finalised after the end of the tax year. Because your annual income figure is used in working out your tax credit award, it can be difficult partway through the year to know if your annual income has changed significantly. For instance you may get a small amount of overtime or reduce your hours temporarily and you cannot tell if and how much your annual income figure is going to be affected. However, if your income does change, you may carry on getting the wrong amount of tax credits if you delay telling HMRC. It is normally a good idea to report income changes as soon as possible. If you do contact HMRC when the changes occur, you reduce the risk of being overpaid or underpaid.

Back to the top

What if I have claimed universal credit?

The information on this page about whether to use previous year income or current year income (less the disregards) applies when your tax credits claim is being finalised after you have claimed universal credit in the same tax year. However, new rules apply to how your income figure for either of the tax years is calculated. See our universal credit stopping tax credits section.

Back to the top

More information

This page gives an overview of the income disregards for tax credits. For more detailed information, visit the following 'understanding the disregards' page on our website for advisers.

Back to the top