Help to Buy Remortgage

How Help to Buy equity loan redemption actually works

The single biggest surprise on a Help to Buy remortgage is the redemption number. The 20 percent figure most borrowers carry in their heads is the equity loan's original share of the purchase price, not the redemption amount. The redemption is the same percentage of current market value.

Worked illustration on a representative case:

• Original purchase: £400,000 in 2018, 20 percent equity loan = £80,000 from Homes England.
• Current market value (2026 RICS valuation): £550,000.
• Equity loan redemption amount: 20 percent of £550,000 = £110,000.
• Differential vs original loan: £30,000 more than the original £80,000 figure.

That uplift is real money. It comes from the lender's new main mortgage (or from cash savings, or from a partial-redemption staircase route), not from anywhere else. The bigger the property appreciation since purchase, the bigger the redemption gap. London borrowers redeeming a 40 percent equity loan on a property bought between 2018 and 2021 are often facing £60,000 to £150,000 more than they originally expected.

The redemption process itself requires four things in sequence. A RICS Red Book valuation, instructed independently of the new main mortgage lender's valuation. A redemption certificate request to Target HCA (Homes England's appointed Help to Buy administrator). A conveyancer acting for you, coordinated with the lender's solicitor. And the new main mortgage offer ready to draw on the day the redemption funds are due.

Sarah's note: most Help to Buy borrowers we speak to are surprised by the redemption arithmetic. The 20 percent sounds fixed in their head. It is not. The bigger the property appreciation, the bigger the redemption bill. The borrowers caught hardest are the ones who waited until after the Year 5 anniversary to start the conversation, then discovered the redemption number was £30,000 higher than the original loan AND the equity loan interest was already running.

How Help to Buy equity loan interest accrues after Year 5

The Help to Buy equity loan is interest-free for the first 5 years. From Year 6 onwards the equity loan accrues interest annually. Three numbers matter.

• Year 6 rate: 1.75 percent per year, charged on the equity loan's share of current market value (not the original loan amount).
• Year 7 onwards: Year 6 rate plus RPI plus 1 percent, applied each April. With RPI at 4 to 5 percent in 2024 to 2026, the Year 7 rate is often 6 to 7 percent, the Year 8 rate higher.
• Compounding: the uplift applies to the previous year's rate, not to the original 1.75 percent. Cost runs upward fast.

On a £100,000 outstanding equity loan, Year 6 interest is around £1,750. By Year 8 in a 4 to 5 percent RPI environment, the same equity loan can cost £4,000 to £8,000 per year in interest alone. That is on top of your main mortgage payment, and it is not contributing to repayment of the equity loan itself. The rate increases compound, so the cost in Year 10 is materially higher again.

The 1.75 percent Year 6 figure sounds manageable on the day the letter arrives. It is the RPI plus 1 percent annual uplift that catches borrowers out. By Year 8 or 9 the equity loan interest line is often higher than the same money borrowed on a residential mortgage. That arithmetic is the reason most Year 5 redemption cases happen at all.

How lenders stress the new combined position

On a Help to Buy remortgage the lender does not just look at the new main mortgage. They model the combined cost of the new main mortgage plus any residual equity loan interest, and they stress the main mortgage at 6.5 to 7 percent regardless of the fixed rate quoted.

• New main mortgage stress. Standard FCA MCOB 11.6 stress rate of 6.5 to 7 percent applied to the new main mortgage balance. On a £325,000 main mortgage at a stress rate of 7 percent over 25 years, the assumed monthly cost is around £2,300 for affordability purposes.
• Residual equity loan interest. If the equity loan is staying in place, the lender factors in the current annual equity loan interest cost as committed expenditure. On a £100,000 equity loan in Year 6, that is £1,750 per year (£146 per month). Modest impact for Year 6 cases; bigger by Year 8.
• Full redemption uplift. Where the new main mortgage funds full equity loan redemption, the new main mortgage is bigger by the redemption amount. Loan-to-income stretches. On a £450,000 household income joint case the stretch is usually absorbed; on a borderline household income case it can push the application into a manual-underwrite lender.
• High-LTV routes. Where the redemption requires a 90 percent LTV remortgage, Halifax, Nationwide and a few specialist building societies remain active. 95 percent LTV is uncommon on full HTB redemption but available via a smaller specialist group.

What we have found is that the LTV result on day one is rarely the obstacle. The affordability stress is. A couple comfortable on their existing combined position can find themselves £40,000 short of the new borrowing target purely because the lender models a 7 percent stress rate on a £325,000 main mortgage where the fix is 5 percent. Picking a lender that uses a lower stress rate (often a building society on manual underwrite) is more useful than picking the lowest headline rate.

Lenders for Help to Buy remortgages in 2026

Four tiers of lender will arrange a Help to Buy remortgage, each with its own ideal profile. The right tier depends on your LTV after redemption, how stretched the affordability looks, and whether your case is a clean Year 5 redemption or a more complex profile.

• High street clearing banks. Halifax, Nationwide, Santander, NatWest, Barclays, HSBC, Lloyds. All accept Help to Buy remortgage cases. Halifax and Nationwide lead on well-developed HTB redemption process and tend to have the smoothest coordination with Target HCA. Best for clean Year 5 redemption with comfortable affordability and 75 to 85 percent LTV after redemption. Standard 4.5x income multiple, prime high street rates.
• Building societies on manual underwrite. Skipton, Coventry, Yorkshire, Leeds. Useful where the combined affordability is borderline on the high street scorecard. The manual underwrite reads the new combined position, considers HTB equity loan interest as a known cost rather than scorecard-treated, and lends on flexibility a high street scorecard cannot. Useful for older borrowers near maximum age, complex income profiles, or higher LTV remortgages.
• Specialist residential lenders. Vida, Saffron, Buckinghamshire, MBS Lending. Useful where the case has a complicating factor: 90 percent LTV after redemption, a recent credit blip, mixed income, or one-year accounts post-self-employment. Rate premium of 50 to 150 basis points above prime high street, but the case places where the high street declines.
• Private banks under the FCA high net worth definition. Coutts, Weatherbys, Investec, Barclays Private Bank. Relevant where the HTB borrower has since become the FCA high net worth rules qualifying (income above £300,000 or net assets above £3 million). Whole-of-wealth affordability assessment, income multiples not formally applied, full redemption of an equity loan absorbed without scorecard friction. Typically AUM expectations in proportion to the loan size.

Indicative 5-year fixed rates for Help to Buy remortgages in 2026:

• High street prime (clean credit, 75 to 85 percent LTV after redemption): 4.75% to 5.50%
• High street established HTB (Halifax / Nationwide / Santander HTB process): 4.85% to 5.65%
• Specialist HTB (90 percent and above LTV, complex profile): 5.45% to 6.50%
• HNW private bank (the FCA high net worth rules, AUM relationship): 5.25% to 6.00%

Rates and lender criteria are subject to change. Figures correct at time of publication. Always speak to your broker for up-to-date rates and lending criteria on your specific case.

When the remortgage works and when it does not

The cases that place cleanly. Clean Year 5 redemption. Equity built up over the holding period. Joint income comfortable against the new combined main mortgage. LTV after redemption inside 80 percent. No credit blips. Both borrowers still on the mortgage from the original purchase. Standard residential property without cladding or shared ownership complications.

The cases that need more thought. Affordability already stretched against current spending. LTV after redemption above 90 percent. A borrower removed from the mortgage since original purchase (separation, divorce, buy-out). Property valuation flatlined or fallen (rare but possible in some flat market areas, particularly post-2022 in parts of the North East and certain new-build estates). Cladding affecting the EWS1 valuation. Recent self-employment with one year of accounts.

The cases where selling beats remortgaging. Where the redemption cost has run materially ahead of the original loan AND the property no longer fits the household (more children, less space). Selling, paying out the redemption from sale proceeds, and rebuying often nets out better than a stretched remortgage that the household will outgrow in 18 months.

Sarah's blunt opinion: most Help to Buy borrowers leave the redemption decision too late. The remortgage to fund it should be in motion six months before your Year 5 anniversary, not three weeks after the interest kicks in. The RICS valuation takes 2 to 4 weeks. The Target HCA redemption certificate takes 4 to 8 weeks. The new lender's underwriting and offer take 3 to 5 weeks. Stack those serially in Year 6 with the interest clock running and you have already lost £200 to £400 in equity loan interest you did not need to pay.

One operational note. Get your conveyancer briefed before you instruct anyone else. Help to Buy redemptions sit at the interface of three parties (lender's solicitor, your conveyancer, Target HCA), and the conveyancer that has done HTB redemptions before saves a week of paperwork at the back end. We sometimes find clients are halfway through with a high street conveyancing factory that has never seen a Target HCA redemption certificate, and the case stalls in week 6 while they work it out.

Run the SDLT if you are selling and rebuying

A standard Help to Buy remortgage on the same property does not trigger stamp duty. SDLT only applies if you are selling the HTB property and buying a different one. The amount depends on the purchase price, your buyer status (additional dwelling surcharge if you keep the current property, non-UK resident surcharge for overseas residents) and where in the UK the property sits (SDLT in England and Northern Ireland, LBTT in Scotland, LTT in Wales). The Fox Davidson calculator runs all three regimes on your specific price.

Frequently Asked Questions

Why a specialist broker matters on Help to Buy remortgages

Help to Buy remortgages look like a standard residential remortgage with one extra item on the to-do list. They are not. They sit at the intersection of three independent parties (the new mortgage lender, Target HCA, your conveyancer) and they run to a hard deadline (the Year 5 anniversary, beyond which the interest clock starts). The cases that stall are the ones where one party's timing assumption diverges from the other two.

What we find with HTB remortgages is that the lender selection matters more than the rate at the top of the comparison table. A 5.05 percent fix at Nationwide that completes inside Year 5 is worth materially more than a 4.85 percent fix at a lender whose Target HCA coordination takes an extra 8 weeks and pushes completion into Year 6 with the interest clock already running. The headline rate matters. The completion timing usually matters more.

In the cases we arrange, we run the timing question first and the rate question second. We know which lenders have well-developed HTB redemption process (Halifax and Nationwide lead). We know which conveyancers have done a hundred Target HCA redemptions and which have done none. We know which RICS surveyors turn round a Red Book valuation in 2 weeks rather than 5. Those three operational details determine whether the case completes in week 10 or week 18.

The cases we find easiest to place are the clean Year 5 redemptions with comfortable affordability and 75 percent LTV after redemption. The cases we work hardest on are 90 percent LTV stretches, borrowers removed from the mortgage since original purchase (post-divorce buy-outs are common), and flats with cladding complications. We do all of them.

Indicative rates and lending metrics. Rates and lender criteria change frequently and vary by scheme type, location and borrower profile. Speak to us for figures specific to your case.