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A tracker mortgage can become more expensive when its reference rate rises, but you can usually review three routes: stay on the tracker, take a new deal with your current lender (a product transfer), or remortgage to another lender. Start by checking your contract and asking the lender for a current redemption figure, any early repayment charge (ERC), and its available fixed-rate deals. Then compare the total cost, affordability checks, flexibility and likely time you will keep the new deal. A fixed rate buys payment certainty for its term, not necessarily the lowest overall cost.
This guide applies to UK residential mortgages. Your lender’s offer, mortgage illustration and current quotation control; rates, fees and eligibility change, so do not treat general examples as a personal recommendation.
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Short answer: contact your existing lender first. Ask what rate your tracker follows, how its margin and payment changes work, whether an ERC applies, and what it would cost to repay or switch today. Request product-transfer illustrations, then compare them with remortgage quotations from other lenders. Include every fee and the payment under plausible rate scenarios, not just the headline interest rate.
The Financial Conduct Authority (FCA) says that a borrower who is up to date with payments should generally be able to switch to a new deal with the same lender without an affordability check, unless they want to borrow more, although exceptions apply. A move to a new lender will usually involve a fresh affordability assessment.
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Why can a tracker mortgage payment rise?
A tracker follows a specified external rate, commonly the Bank of England base rate, plus or minus a contractual margin. When that reference rate rises, the mortgage rate and usually the payment rise according to the mechanics in your contract. The lender may change the payment on a stated date or after a specified notice period, so check the mortgage offer rather than relying on how another tracker works.
Look for four details in the offer or mortgage illustration:
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- Reference rate: the exact rate being tracked and the source used to set it.
- Margin: the fixed percentage added to (or, in some products, deducted from) the reference rate.
- Cap or collar: any upper or lower limit on the rate.
- Payment mechanics: when the lender recalculates the payment, how much notice it gives and whether the term or payment changes first.
MoneyHelper’s explanation of mortgage interest rates notes that the precise terms determine how and when a tracker change reaches your payment. A rate rise does not by itself mean switching is the right response: the decision depends on your balance, remaining term, budget and plans.
What are the three ways to respond to a rising tracker rate?
You can remain on the tracker, switch to another deal with the same lender, or remortgage elsewhere. Compare all three over the period you expect to keep the deal.
| Route | What happens | Main advantage | Main risks or checks |
|---|---|---|---|
| Stay on the tracker | Your rate continues to move with its reference rate. | Usually maximum flexibility if the contract has no ERC, and you can benefit if rates fall. | Payments can rise further; confirm the actual ERC rather than assuming it is zero. |
| Product transfer | Your current lender replaces the tracker with one of its deals, such as a fixed rate. | Often simpler and, for an up-to-date borrower not borrowing more, may not require a new affordability assessment. | The lender’s range may not be the cheapest; check fees, term, overpayments and any new ERC. |
| Remortgage to another lender | A new lender repays the old mortgage and issues a new one. | Access to a wider range of rates and features. | Normally requires affordability and property checks, plus possible legal, valuation, arrangement and administration costs. |
How do I check whether I can leave the tracker?
Do not infer from the word “tracker” that leaving is penalty-free. Ask for a written, current redemption or switching figure and read the ERC section of your mortgage offer.
- Identify the deal end date. Some trackers are lifetime products; others are discounted or introductory deals that revert to another rate after a stated period.
- Ask whether an ERC applies today. Request the percentage or flat amount, the dates on which it changes and whether it applies to a full repayment, a product transfer, or only certain transactions.
- Request the balance used in the calculation. The charge may be based on the outstanding mortgage balance. MoneyHelper says an ERC is commonly around 1% to 5% of the balance, although some products use a flat charge; that range is general context, not your quotation.
- Ask about other exit costs. Confirm any account-closing, administration or deed fees and whether the lender will waive them for a product transfer.
The FCA’s mortgage guidance explains that an ERC normally depends on the remaining balance and the contract. A lender’s figure can expire, so obtain an updated figure if your completion date moves.
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How do I ask my current lender for a product transfer?
Tell the lender you want to review your tracker because rates have risen and ask for every suitable product-transfer option. Request the rate, fixed period, monthly payment illustration, product fee, ERC schedule, overpayment allowance and portability terms in writing.
- Prepare your facts. Have the mortgage account number, current balance, remaining term, repayment type, property value estimate and the date your current deal began.
- Ask whether an affordability check is required. The FCA says an up-to-date borrower should generally be able to switch to a new deal with the same lender without one when not borrowing more, but lender and regulatory exceptions exist. Ask the lender to explain any exception that applies.
- Request like-for-like illustrations. Compare the same remaining term first; then ask for alternatives such as a shorter or longer term separately so the payment difference is not mistaken for a cheaper rate.
- Check the new contract. A product transfer can introduce a new fixed period and a new ERC. Verify early-repayment rules, overpayment limits and whether the deal can be ported.
- Confirm the deadline. Ask how long the offer is valid and when the new rate starts. Keep the written quotation and documents.
A product transfer may be attractive when a new lender’s affordability test could be difficult, but it is not automatically the cheapest option. Compare the lender’s total cost with outside offers.
When does remortgaging to another lender make sense?
Remortgaging can provide access to a wider range of rates or features, but the new lender normally reassesses affordability and the property. It is worth considering when the potential interest saving and flexibility exceed the ERC and all switching costs, and when your income, spending, loan-to-value position and credit history meet the new lender’s criteria.
MoneyHelper’s remortgaging guidance recommends comparing your current lender’s transfer deals with other lenders. A new application can involve valuation, legal, arrangement and administration costs; some offers may cover particular costs, but rely only on the written illustration for the deal you are considering.
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Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →- Collect comparable quotes. Ask for the same balance and remaining term so rates and payments are comparable.
- Disclose the full position. Include income, regular commitments, dependants, other borrowing and any changes a lender asks about. Do not assume acceptance because a headline rate is advertised.
- Allow for property checks. The lender may require a valuation and legal work before completion.
- Compare the completion date with your ERC schedule. A delay can move you into a different charge band or cause an offer to expire.
- Read the new mortgage conditions. Check overpayments, portability, fixed-period exit charges and what rate applies after the deal ends.
How much could switching cost?
Use a total-cost comparison for the period you expect to keep the new deal. A simple framework is:
Total cost to compare = interest and required payments over the chosen period + ERC + product or arrangement fee + legal, valuation and administration costs − any confirmed incentives.
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The “interest and payments” figure must be based on your actual balance, repayment type and remaining term. Ask each lender or adviser for an illustration and use an official repayment calculator to sense-check the result; do not substitute a generic payment for a personalised quote.
Include costs that are easy to overlook:
- An ERC on the tracker, if you leave during a charge period.
- A product fee on the replacement deal, whether paid upfront or added to the balance. Adding a fee increases the debt and can itself accrue interest.
- Valuation, legal and administration charges on a remortgage.
- Any cost of ending the existing account or changing the repayment term.
- The cost of losing valuable features, such as a generous overpayment allowance or portability.
Compare the result over the time you realistically expect to keep the deal, not only over its initial fixed period. A lower rate can still be more expensive if a large fee or ERC is paid to obtain it.
How should I compare a fixed rate with staying on a tracker?
A fixed rate keeps the contractual interest rate and required payment unchanged during the fixed term, which can make budgeting easier. It also removes the benefit of future falls in the tracked rate and commonly carries an ERC if you leave before the fixed period ends.
Build at least three payment scenarios using your own balance and remaining term:
- Lower-rate scenario: what happens if the tracker’s reference rate falls?
- Current-rate scenario: what would you pay if the rate remains around today’s level?
- Higher-rate scenario: what payment could you manage if the reference rate rises again?
Then compare those payments with the fixed deal, including its fee and the cost of exiting it. A fixed rate can be sensible when payment certainty is more important than the possibility of cheaper payments later; a tracker can be preferable when you can absorb changes and value flexibility. Neither choice is universally cheaper.
Check overpayment rules before fixing. If you expect a bonus, inheritance or other lump sum, a restrictive allowance can matter as much as the rate. If you may move home, ask whether the mortgage is portable and what happens to any additional borrowing. Porting can still require a new application and the lender’s affordability criteria, as MoneyHelper cautions.
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What if a new lender says I cannot afford the mortgage?
A remortgage application normally includes an affordability assessment. The lender will consider income, committed spending and the proposed payment under its own criteria. A failed application does not automatically mean your current lender must offer a cheaper deal, so avoid making multiple applications without understanding the criteria.
If you are up to date with payments, ask your existing lender about product-transfer options first. If the payment is becoming unmanageable, contact the lender before missing a payment. MoneyHelper’s rate-rise guidance says to discuss possible arrangements promptly.
Possible changes might include extending the term or temporarily paying less. These can reduce the immediate payment but may increase total interest, extend the repayment period or affect your credit file. Ask the lender to state the long-term cost, how and when payments will reset, and any credit-reporting consequences before agreeing.
What documents and figures should I gather?
Having the information ready makes quotes easier to compare and helps reveal whether an advertised rate is realistic for you.
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- Remaining term and repayment type shown on the statement.
- Current tracker rate, reference rate and margin.
- ERC wording and a dated redemption or switching figure.
- Property address and a realistic value estimate.
- Income evidence and details of regular spending if a new lender will assess affordability.
- Any planned move, renovation, overpayment or change in working pattern.
Ask for illustrations in writing. Keep a note of the date, expiry date, fees, payment, ERC schedule and assumptions for every quote so that a later rate change or delay does not invalidate your comparison.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What mistakes should I avoid when switching?
- Assuming “tracker” means no penalty. Check the contract and current figure.
- Choosing on the headline rate alone. Add ERCs, fees, legal costs and incentives.
- Ignoring the post-deal rate. Ask what rate applies when a fixed period ends and set a reminder to review it.
- Stretching the term without pricing the total interest. A lower payment can cost more overall.
- Forgetting your plans. A long fixed period may conflict with a likely move or a need to make large overpayments.
- Applying before checking eligibility. A new lender’s affordability and property criteria may differ from your current lender’s.
- Waiting until a payment is missed. Contact the lender as soon as the budget shows a likely problem.
When should I get mortgage advice?
Consider qualified, independent mortgage advice when the ERC is large, your income or property situation is unusual, you are close to an affordability limit, or you need to weigh portability and overpayments against a fixed rate. MoneyHelper notes that many people use an independent mortgage broker and that advice may be fee-based. Ask how the adviser is paid, which lenders they can consider and whether any fee is payable if you do not proceed.
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An adviser cannot remove the need to read your mortgage contract. Ask for the recommendation’s assumptions, the total cost over your intended period and the consequences of leaving early.
A practical switching checklist
- Read the tracker offer: reference rate, margin, cap or collar and payment-change dates.
- Ask your lender for a current redemption or switching figure and a written ERC explanation.
- Request all product-transfer options, including fees, fixed terms, overpayments and portability.
- Obtain comparable remortgage illustrations and understand the new lender’s affordability process.
- Calculate total cost over the period you expect to keep the deal.
- Stress-test the payment against lower, current and higher reference-rate scenarios.
- Check the completion deadline, offer validity and ERC band before committing.
- If payments may become unaffordable, contact the lender immediately and ask for the long-term effects of any support arrangement.
- Use qualified advice when the comparison or application is complex.
What is the safest decision if rates keep rising?
There is no universally safest mortgage type. The robust process is to verify your contract, obtain the current lender’s transfer quote, compare a properly costed remortgage and choose a payment you can sustain under a plausible higher-rate scenario. A fixed rate provides certainty for its term; staying on a tracker preserves flexibility and the chance to benefit if rates fall. Your balance, term, budget and plans determine which trade-off is acceptable.
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Frequently Asked Questions
Can I switch from a tracker without remortgaging?
Often, yes: ask your existing lender for a product transfer. It changes the deal with the same lender rather than replacing the mortgage, but the lender may apply eligibility rules and a new ERC schedule, so obtain the written terms before accepting.
Are tracker mortgages always free to leave?
No. Some trackers have an ERC during an introductory or discounted period, and some contracts use a flat charge rather than a percentage of the balance. Only the lender’s current redemption or switching figure tells you what leaving would cost.
Can I change deals if I am behind on mortgage payments?
The FCA’s general no-new-affordability-check expectation is for borrowers who are up to date and not borrowing more. If you have missed payments, speak to the lender promptly; eligibility and support options can differ, and waiting may reduce the available choices.
Is using an independent mortgage broker free?
Not necessarily. MoneyHelper says advice may be fee-based, and firms can have different lender panels and charging methods. Before proceeding, ask about the fee, when it is payable, which lenders are covered and what happens if no mortgage completes.
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