Mortgage With Two Parts Ending on Different Dates? How to Plan Your Review

By PMS Mortgages · Published 14 October 2026 · Meet Ria Ali

Your home may be repossessed if you do not keep up repayments on your mortgage.

A mortgage with two parts can look like one loan because one payment leaves your account. Underneath that payment, the balances may have different rates, repayment terms and deal end dates. When one fixed rate ends, the other part may still be subject to its own conditions.

The first step is to map the account rather than select a new deal for the total balance without checking its components. This guide explains how to prepare a review and the questions that help your adviser compare the options.

Why might a mortgage be split into parts?

Additional borrowing, a previous home move or different repayment arrangements can lead to separate mortgage parts, sometimes called sub-accounts. Halifax’s public guidance explains that its sub-accounts can have different rates, terms and repayment methods, with individual payments combined into the total payment.

Your lender’s statement and offer documents establish the position for your account. A label such as “part 1” does not tell you which deal is ending, and a single direct debit does not mean the same conditions apply to all the borrowing.

Create a one-page mortgage schedule

Record each part on a separate row. Start with the current statement and check anything that is unclear with the lender. Use a dated balance and distinguish the remaining repayment term from the initial deal end date.

Also record the total borrowing and payment. That lets you check the account as a whole while keeping the separate decisions visible. If an interest-only part is involved, include the repayment strategy and any evidence the lender requires.

A simple example of different expiry dates

Imagine part A has a £180,000 balance with a deal ending on 31 January 2027. Part B has a £60,000 balance with a deal ending on 31 October 2028. The total balance is £240,000, but the first rate change concerns only part A. Part B has a later decision date.

These are invented balances and dates, not a real mortgage recommendation. If you compare a replacement loan for the full £240,000, ask how part B would be repaid and whether its existing conditions create a cost. If a hypothetical 2% early repayment charge applied to the £60,000 being repaid, that charge would be £1,200. The actual amount and calculation depend on the lender’s terms and redemption information.

Reviewing the earlier part with the current lender

Ask which product-transfer options apply to the part approaching expiry. Confirm the intended start date, fee treatment and whether the proposed change affects any other part. The account structure and lender’s switching rules matter.

Then review the combined household payment after the change. A manageable payment for part A alone does not explain what the total mortgage will cost. Include any other committed borrowing and consider the later expiry already visible on your schedule.

Considering a remortgage to another lender

Ask how the proposed remortgage would redeem the existing secured borrowing. Do not assume that an ordinary move to another lender simply transfers the earlier part and leaves everything else untouched. The transaction and costs need to be established for the actual account.

Compare the complete required borrowing, relevant early repayment charges, product fees, legal and valuation costs, repayment terms and remaining balances. Our product transfer versus remortgage guide explains how to keep those comparisons consistent.

Should you try to align the end dates?

Having one future review date can be convenient, but convenience does not establish the most suitable deal. Aligning dates may involve a different product period, a period on a variable rate or a charge for changing an existing part. Each route needs its own assessment.

For the example above, the gap between expiry dates is about 21 months. Ask what options, if any, could fit the desired timetable and what they cost. A product labelled “two-year fixed” may have a specified calendar end date, so read the actual offer rather than assuming an exact anniversary.

Discuss how much payment uncertainty you could manage and whether a home move is likely before the later date. Choosing an arrangement solely to make a spreadsheet neater can overlook costs or flexibility that matter more to your household.

Keep overpayments and extra borrowing in the picture

If you expect to make a lump-sum repayment, ask which part it would be allocated to and what allowance or charge applies. Do not assume the lender will use the part you have in mind without an instruction. Get the relevant process and terms confirmed.

If you need extra money, explain its purpose and timing. Additional borrowing may create another part with another rate or expiry. The question becomes how the whole account supports your plans, rather than how to replace one expiring product as quickly as possible.

Questions for your mortgage review

• Which part ends first, and what happens if I do nothing?

• Which existing-customer deals can be considered for that part?

• What would the combined payment and total costs be?

• What charges apply if a wider remortgage redeems the other part?

• Is aligning dates worth the cost and conditions involved?

• How do my moving, overpayment or additional-borrowing plans affect the options?

Bring the schedule and current mortgage information to PMS Mortgages. We can investigate relevant lender options and explain the recommendation and fees. Book a mortgage review, explore remortgaging advice or read our moving-home guide if a purchase is also part of the plan.

General information only. The options depend on the lender, account structure, property and applicant. The numerical example is for explanation and does not establish the charges or products available to you.

Sources and further reading

• Halifax: understanding mortgage sub-accounts

• MoneyHelper: comparing remortgage costs