More than one million households will receive a lump sum into their bank accounts.
The Department of Work and Pensions confirmed that £149 will be lining the virtual pockets of a sizeable number of Brits soon.
The lump sum will be paid to those switching from one of the legacy benefits which Universal Credit is replacing.
The rule changes came into effect on July 22.
The DWP says that over a million households are set to gain from the two-week run-on.
Run-on payments are premiums claimants were receiving prior to moving onto Universal Credit.
These include Enhanced Disability Premium, Carer Premium and ESA work-related activity component.
Minister for Welfare Delivery Will Quince said: “This one-off payment will provide additional support as claimants move from legacy benefits to Universal Credit.
"It doesn’t have to be paid back and won’t affect their UC award, so is welcome extra cash in pockets.”
Universal Credit is replacing Child Tax Credit, Housing Benefit, Income Support, Income-based Jobseeker's Allowance, Income-related Employment and Support Allowance and Working Tax Credit.
Chair of the Work and Pensions Select Committee and Labour MP for East Ham Stephen Timms said: “Like many desperately needed changes to Universal Credit, these new payments have been a long time coming – they were announced in the 2018 Budget.
“They are a welcome sign that the Government recognises that the five-week wait for a first payment of Universal Credit causes serious difficulties for people.
"The Committee’s inquiry into the wait has heard evidence, though, that they may not be enough. We’ll be making recommendations to the Government in the autumn once we’ve finished hearing evidence about the options for action.”
