Reviewed by Matilda Rose Edwards. Researches and maintains every calculator and guide on this site.
Part 1 of 5
The six benefits Universal Credit replaced
Legacy benefits is the informal name for the six means-tested benefits Universal Credit was built to replace: Working Tax Credit, Child Tax Credit, Income Support, income-based Jobseeker's Allowance, income-related Employment and Support Allowance and Housing Benefit. Each had its own claim, its own rules and its own payment cycle, which is the problem Universal Credit was meant to solve by paying one amount once a month. Contribution-based JSA and ESA were not replaced. They still exist as New Style JSA and New Style ESA, they are not means-tested, and you can be paid one alongside Universal Credit.
Part 2 of 5
What a migration notice is
A migration notice is the letter that moves you. It tells you that your legacy benefit is ending and gives you a deadline, normally three months from the date on the letter, to make a Universal Credit claim. The deadline is the part that catches people out: your legacy benefit stops on that date whether or not you have claimed, so ignoring the letter does not keep the old payment running. If you need longer, you can ask for an extension before the deadline passes, and it is usually granted where there is a good reason.
Check the date on the figures
Part 3 of 5
Transitional protection, and how to lose it
If your Universal Credit award would be lower than the legacy benefits it replaces, a transitional element can top it up to the same amount on the day you move. It only exists where you claimed in response to a migration notice. Claiming voluntarily, before a notice arrives, never brings it, which is why moving early to see what happens is an expensive experiment. The element then erodes: it falls as your other elements rise, so an uprating or a new child reduces the protection rather than adding to your award, and certain changes end it outright.
Part 4 of 5
What changes on the day you move
Three things usually surprise people. Payments become monthly in arrears rather than weekly or fortnightly, so the first one arrives about five weeks after you claim. Rent that used to be paid straight to a landlord under Housing Benefit is normally paid to you instead, and you pay the landlord. And earnings are tapered at 55p in the pound above any work allowance rather than assessed against fixed hours rules, which is better for most people working short hours and worse for a few working long ones.
Part 5 of 5
Check before you move voluntarily
If no migration notice has arrived, you are choosing the date, and the choice is worth modelling first. Run the numbers on the calculator, compare them with what you receive now, and remember that a voluntary claim cannot be reversed: the legacy benefit ends the moment the Universal Credit claim is made. A free welfare rights service will do this calculation with you, and on a borderline case that advice is worth more than any online tool.
Rates
The figures behind this guide
Every amount here is 2026/27 and is read from the same table the calculators use, so the page and the tool cannot drift apart.
- Benefits replaced
- 6
- To claim after a notice
- 3 months
- Transitional protection
- Notice only
- To the first payment
- 5 weeks
Plus Housing Benefit for most renters
Then the legacy benefit stops
Never on a voluntary claim
Monthly, in arrears
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