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UC vs legacy benefits comparison

Managed migration from legacy benefits to Universal Credit completed in March 2026. This tool is useful for households who moved via natural migration (no Transitional Protection), anyone checking the TP amount they were given, or a retrospective view of why some groups — disabled adults with the Severe Disability Premium especially — are worse off on UC.

HouseholdWho is in your household and their ages.

I have a partner I live with

Your age

Dependent children in household

Work and earningsHours and take-home pay (net of tax / NI) per month.

Your weekly hoursYour monthly net earnings — £

Monthly unearned income — £

Occupational / personal pensions, maintenance (in excess of disregard), some taxable incapacity payments. Not DLA, PIP, AA, Child Benefit, or Housing Benefit.

Health and caringThese are the drivers of the biggest differences between UC and legacy — particularly the Severe Disability Premium.

Limited Capability for Work and Work-Related Activity (UC) / ESA support group (legacy)£44,930/month UC LCWRA element ≈ £48.50/week ESA support component + £21.80 EDP on legacy.Disability Premium qualifier (legacy) — on a qualifying disability benefit (PIP, DLA, AA)£44.70/week for single, £63.80/week couple. No UC equivalent — it is the premium most often lost on migration to UC.Severe Disability Premium qualifier — on PIP daily-living (or DLA middle/higher care, or AA), live alone, nobody claims Carer's Allowance for you£82.90/week for a single adult. This has NO UC equivalent. On managed migration it is reflected in Transitional Protection; on natural migration it is lost entirely.Enhanced Disability Premium£21.80 single / £31.15 couple per week. Automatically applies alongside the support-group ESA component.You (or your partner) care 35+ hours/week for someone on a qualifying disability benefitTriggers the Carer Premium on legacy (£46.93/week) and the UC carer element (£213.68/month).You're a lone parent with a child under 5 (Income Support gateway)

Housing and capitalRent and savings — both treated similarly across UC and HB, with some differences in disregards.

Monthly rent (eligible, before housing benefit) — £

Zero if you own your home or live rent-free. We treat this as the eligible rent for both UC housing costs and Housing Benefit — in reality both are capped by Local Housing Allowance for private renters.

Capital (savings + investments combined) — £

£6,000–£16,000: notional tariff income applies. £16,000+: not eligible for means-tested UC or legacy. Tax credits have no capital limit.

Why the two totals differ

UC consolidated six benefits into one, so like-for-like a typical household sees a similar monthly figure. Where they diverge, four drivers dominate:

Severe Disability Premium (SDP). Worth £82.90/week for a single adult on legacy benefits, with NO UC equivalent. This is the single biggest driver of “worse off on UC”. On managed migration it is reflected in Transitional Protection; on natural migration it is lost entirely.
Disability Premium (DP) and Enhanced Disability Premium (EDP). Legacy IS/JSA(IB)/ESA(IR) paid these for adults on a qualifying disability benefit. UC has the LCWRA element (£449.30/month) which is generous but applies only if you are found to have Limited Capability for Work-Related Activity — a separate test. Someone on PIP who is still job-seeking could have had DP + EDP on legacy but gets nothing equivalent on UC unless they are also found to have LCWRA.
Two-child limit and tax-credit taper. Same 2-child limit and similar taper rates (41% tax credits vs 55% UC), but the shape is different. UC tapers against net monthly earnings in real time; tax credits taper against annualised gross earnings with a £2,500 rise-disregard. Working households often find UC smoother but slightly less generous at higher earnings.
Work allowance vs earnings disregards. UC has a monthly work allowance (£411 if you have housing costs, £684 if not) before any taper. Legacy ESA(IR)/IS/JSA had tiny £5/£10/£25 weekly disregards. This makes UC noticeably better than legacy out-of-work streams for part-time workers; it makes little difference for households on Tax Credits.

How we calculate this

Both legs use the same household inputs. UC runs through the UC estimator (standard allowance, child elements with the two-child limit, LCWRA, carer element, housing, work allowance, 55% taper, tariff income on capital). The legacy leg builds up whichever streams apply:

Tax Credits stream — if anyone works 16+ hours (or 30+ if single with no children): Working Tax Credit (basic, couple/lp, 30-hour, disabled-worker, severe-disability) + Child Tax Credit (child element, family element if protected, disabled-child), tapered at 41% above £7,955 (WTC) or £19,995 (CTC-only).
Out-of-work stream — one of Income-related ESA (if LCW/LCWRA), Income Support (lone parents with a child under 5 or carers), or income-based JSA. Applicable amount = personal allowance + ESA support component + Disability Premium + Enhanced Disability Premium + Severe Disability Premium + Carer Premium; reduced £-for-£ by earnings above the £5/£10/£25 disregard plus tariff income on capital.
Housing Benefit — passported to full eligible rent if you are on IS/JSA(IB)/ESA(IR) with a positive award. Otherwise HB = eligible rent − (income − HB applicable amount) × 65%.

Capital: means-tested legacy benefits and UC both disqualify above £16,000, and both apply notional tariff income between £6,000 and £16,000 — legacy at £1/week per £250 band, UC at £4.35/month per £250 band. Tax credits have no capital limit (notional interest above £300/year applies but we treat as nil).

Not modelled: the WTC childcare element, Council Tax Reduction / Second Adult Rebate, pension-age mixed-couple rules, protected CTC family element for pre-6-April-2017 claims beyond the flag we expose, deprivation-of-capital rulings, and HB non-dependent deductions.

Source: gov.uk benefit and pension rates 2025 to 2026.

Transitional Protection (TP)

When the DWP managed-migrated you from legacy to UC, they calculated a one-off “TP amount” equal to the difference between your legacy award at migration and your initial UC award. TP sits alongside UC elements as a separate amount. It has three important properties:

It does not uprate. Your legacy total was frozen at the migration point; UC elements rise each April with inflation. The gap narrows over time until TP reaches zero.
It erodes against element increases. Each time a UC element in your award increases (either through the annual uprating or through a change in your household, e.g. a new baby triggering a child element), TP falls by the same amount.
It ends on certain changes. Forming or ending a couple, starting work that clears the earnings exemption for 3+ months, or a break in UC entitlement of 3+ months all end TP.

If you received a migration notice and believe your TP amount is wrong, you have one month from the decision to ask for a Mandatory Reconsideration. Advice: triage then Citizens Advice or a welfare-rights service.

Natural migration

A “natural migration” is when a change of circumstances forces you off legacy benefits and onto UC without a migration notice. Examples: becoming a couple (ending tax-credits single claim), separating, needing to claim HB in a new area, moving from JSA to ESA, or any new claim once legacy is closed to new claimants.

There is no Transitional Protection on natural migration. If you are worse off on UC — the classic case is losing the Severe Disability Premium — you receive the UC amount only. The Supreme Court ruled in TP v SSWP (2019/2020) that the DWP was required to provide some protection for SDP claimants specifically, which led to the small SDP Transitional Element, but broader natural-migration losses have no remedy.

If you are about to have a change of circumstances that would force you from legacy onto UC, consider whether you can delay the change (until after a managed migration notice that may still be in the post), or accelerate it (if UC will be more generous).