Tracker mortgages
A tracker rate moves in step with the Bank of England base rate, plus a fixed margin. You benefit immediately if the base rate falls — and pay more if it rises. It suits borrowers who expect stable or falling rates and can absorb some volatility.
How a tracker works
A tracker is a variable rate mathematically tied to an external index — almost always the Bank of England base rate — plus a fixed percentage. If the base rate is 3.75% and your margin is 0.75%, you pay 4.5%, and your rate moves penny-for-penny with the base rate.
Unlike the lender’s standard variable rate, a tracker can only move when the base rate does, not at the lender’s discretion.
| Aspect | Detail |
|---|---|
| How the rate is set | BoE base rate plus a fixed margin (e.g. 3.75% + 0.75% = 4.5%) |
| The margin | Fixed for the product term — only the base-rate element moves |
| If the base rate rises | Your rate rises penny-for-penny |
| If the base rate falls | Your rate falls penny-for-penny |
| Early repayment charges | Many have none; some apply during an initial period |
| Best suited to | Confident borrowers expecting the base rate to hold or fall |
Who it suits
Financially confident borrowers who expect the base rate to hold or fall, and who can comfortably absorb an increase if they’re wrong. Many trackers have no early repayment charges, adding flexibility.
- Immediate benefit if the base rate falls.
- Often no early repayment charges, so you can switch freely.
- Transparent — moves only with the base rate.
The risk
The flip side of flexibility is exposure: if the base rate climbs, so does your payment, with no ceiling unless you choose a capped product. For contractors who value certainty, a fixed rate may sit better.
What a tracker actually follows
A tracker moves with the Bank of England base rate plus a set margin. If base rate moves a quarter point, your rate moves a quarter point — immediately and mechanically. That transparency is the product's main virtue: there is no discretion involved and nothing to interpret.
It is worth being clear how that differs from the alternatives. A fixed rate does not move at all until the deal ends. A standard variable rate is influenced by base rate but set at the lender's discretion, and sits well above new-deal pricing regardless. Only the tracker follows the Bank automatically.
Who a tracker tends to suit
Someone who can absorb a payment that moves, and who values flexibility. Many trackers carry lower early repayment charges than fixed deals, and some carry none at all — which matters if you expect to move, sell, or repay a lump sum before a fixed term would have ended.
For a contractor, the honest question is whether a variable payment sits comfortably alongside income that already varies between contracts. Some people find one moving number is manageable; others find that two is one too many. Neither answer is wrong, but it should be a deliberate choice rather than a default.
Test the rise before you take it
The discipline that makes a tracker safe is modelling the payment at a rate meaningfully above today's — not because a rise is predicted, but because it is possible. If the higher figure would be uncomfortable, the flexibility is not worth it.
Run it through the rate change calculator before committing. Some trackers also come with a cap, limiting how high the rate can go, which buys part of the certainty of a fix while keeping some of the upside — see discounted and capped rates.
Tracker, answered
Is a tracker cheaper than a fixed rate?+
Sometimes at the outset, but it can become more expensive if the base rate rises. You’re trading certainty for the chance of lower payments — and the risk of higher ones.
Can the lender change my tracker margin?+
No. The margin above the base rate is fixed for the product term. Only the base rate element moves, which is what makes a tracker more transparent than an SVR.
Do trackers have early repayment charges?+
Many don’t, which is part of their appeal — but some do during an initial period. Always check the specific product before assuming you can leave penalty-free.
Will my payment change every time the base rate moves?+
Yes, that is what tracking means, though lenders usually apply the change from the start of the following month rather than the same day. You should be notified in writing of the new payment. Over a long deal that can mean several changes, up and down.
Can I switch from a tracker to a fixed rate?+
Usually yes, and often without penalty if the tracker has no early repayment charge — which is one of the reasons people take them. Check your terms first, then compare the fixed rates actually available to you rather than the headline ones, since your loan-to-value decides which tier you can reach.