A tracker mortgage is a type of variable rate mortgage where the interest rate is directly linked to the Bank of England base rate (Bank Rate). Your rate is set at a fixed margin above (or occasionally below) the Bank Rate, so when the Bank Rate changes, your mortgage rate changes by exactly the same amount. This transparency makes trackers straightforward to understand — but the uncertainty of future rate movements means they are not suitable for everyone.
How a Tracker Mortgage Works
A tracker mortgage rate is expressed as the Bank Rate plus a fixed margin. For example, a tracker at "Bank Rate + 1.5%" means if the Bank Rate is 4.50%, your mortgage rate is 6.00%. If the Bank Rate falls to 4.00%, your rate automatically drops to 5.50%. The margin remains constant for the life of the tracker deal — it is only the Bank Rate element that moves. This is different from a lender's standard variable rate (SVR), which the lender can change at any time and by any amount, regardless of what the Bank Rate does.
Tracker vs Fixed vs SVR
Mortgage Rate Comparison
| Feature | Fixed Rate | Tracker | SVR |
|---|---|---|---|
| Rate basis | Locked for term | Bank Rate + margin | Lender's discretion |
| Payment certainty | High | Low | Low |
| Benefits from rate cuts | No | Yes, immediately | Sometimes, delayed |
| Early repayment charges | Usually yes | Often none | Usually none |
| Typical rate | 4.5% – 5.5% | Bank Rate + 0.5% – 2% | 6% – 8% |
Rates are illustrative and based on typical products available in early 2026. Actual rates depend on loan-to-value, credit history, and lender.
Advantages of Tracker Mortgages
- Benefit from rate cuts immediately: When the Bank Rate falls, your mortgage rate drops by the same amount the following month.
- Transparent pricing: You know exactly how your rate is calculated. There are no hidden discretionary changes as with an SVR.
- Often no early repayment charges: Many tracker mortgages allow you to overpay or remortgage without penalty, giving you flexibility.
- Can be cheaper in a falling rate environment: If rates are trending downward, a tracker will usually outperform a fixed rate over the same period.
Disadvantages of Tracker Mortgages
- Payments go up when rates rise: If the Bank Rate increases, your monthly payment increases by the corresponding amount. This can strain your budget.
- Budgeting is harder: You cannot predict exactly what your payments will be from month to month or year to year.
- No certainty: Unlike a fixed rate, you have no guarantee of what your rate will be next month or next year.
Collar and Cap Rates
Some tracker mortgages include a collar (or floor) — a minimum rate below which your mortgage rate will not fall, even if the Bank Rate drops further. For example, a tracker at Bank Rate + 1.5% with a collar of 3.5% means your rate cannot fall below 3.5% regardless of the Bank Rate. Collars were common after the 2008 financial crisis when the Bank Rate fell to 0.5% and some borrowers' rates would have dropped to very low levels.
Less commonly, some trackers include a cap — a maximum rate your mortgage rate cannot exceed. Capped trackers are rare and tend to have higher margins to compensate the lender for the protection they offer.
Lifetime Trackers vs Introductory Trackers
A lifetime tracker tracks the Bank Rate for the entire mortgage term. You never revert to the lender's SVR and the margin stays the same throughout. These offer long-term transparency but expose you to rate risk for the full term.
An introductory tracker tracks the Bank Rate for a set period — typically two or five years — after which you revert to the lender's SVR. At that point, you would normally remortgage onto a new deal. See our remortgage guide for how to switch.
When a Tracker Might Suit You
- Interest rates are widely expected to fall and you want to benefit from the reductions immediately.
- You plan to sell or remortgage in the short term and want flexibility without early repayment charges.
- You have financial headroom to absorb potential rate increases without difficulty.
When to Avoid a Tracker
- You are on a tight budget and need certainty about your monthly payments.
- Interest rates are expected to rise and you want to lock in the current rate.
- You are a first-time buyer and need the security of knowing exactly what your payments will be while you adjust to homeownership costs.
Use our mortgage calculator to compare monthly payments at different rates, and read our first-time buyer guide for more on choosing the right mortgage type.
This guide is for general information only and does not constitute financial advice. The information is based on publicly available data from the FCA, HMRC, and other government sources. Always seek professional advice before making financial decisions. Figures and thresholds are subject to change — check official sources for the latest values.