When Your BTL Fixed Rate Ends

When a buy-to-let fixed rate ends, nothing pauses to give you time to think. The mortgage rolls straight onto the lender's standard variable rate (SVR) from the next payment date, with no grace period and no second warning beyond the letter the lender sent months earlier. The good news is that the options at this point are simple and well understood: you either arrange a product transfer with your existing lender, remortgage elsewhere, or end up on SVR by default, and knowing which to pursue, and how quickly, is mostly a matter of working through a short list of steps.

This guide covers exactly what to do as a fixed rate approaches its end date or has just ended, how to choose between a product transfer and a full remortgage, and the mistakes that most often turn a routine renewal into an expensive one.

The moment to act

Most lenders let you agree a new deal well before your current one actually ends, commonly from around six months out. That window exists precisely so you are never forced to choose between rushing an application and accepting weeks or months on SVR, provided you actually use it rather than letting it pass.

The practical trigger point is your fixed-rate end date itself, which is stated clearly on your original mortgage offer. If you are inside that six-month window and have not yet started, the priority is to start now rather than waiting for a "better" moment, since every week of delay is a week of lead time you cannot get back. Our guide to tracking fixed-rate end dates covers how to build a reminder system so this point never arrives as a surprise again.

Step by step: what to do

1. Confirm the exact end date and any notice period. Check your mortgage offer or online account rather than relying on memory, since the date that matters is when the fixed period actually ends, not when you first took the mortgage out.
2. Gather current rent evidence. A recent tenancy agreement or a few months of rent statements showing the current rent are needed for both a product transfer and a full remortgage, and having them ready avoids a delay once you have chosen a route.
3. Ask your existing lender for their product transfer rates. This is usually the fastest option to get a firm figure, since it does not require a fresh valuation or full underwriting, and it gives you a benchmark to compare against the wider market.
4. Get the wider market checked in parallel, not afterwards. A broker who specialises in buy-to-let can compare product transfer rates against what else is available within a day or two in most cases, so there is rarely a good reason to look at only one option before deciding.
5. Compare the total cost, not just the headline rate. Our buy-to-let mortgage rates explained guide sets out why a fee attached to a rate can matter as much as the rate itself, particularly on a shorter fix or a smaller loan.
6. Decide between a product transfer and a full remortgage. The product transfer vs remortgage guide walks through how to weigh these against each other properly, including when releasing equity or a change in circumstances tips the decision toward a full remortgage.
7. Submit the application with enough runway before the end date, ideally leaving at least a few weeks of buffer for a valuation, underwriting or paperwork request to come back slower than expected.

If you've already landed on SVR

If the end date has already passed without a new deal in place, do not wait for the "right" moment to sort it, since every additional week on SVR is extra cost with nothing gained in return. The process from here is identical to the steps above, just starting later than ideal: check your options with your existing lender and the wider market in parallel, and move as quickly as the paperwork allows. Our SVR risk guide sets out exactly how much a period on SVR typically costs and why it is worth treating as urgent rather than something to fix "when there's time."

The one thing worth checking before you switch is whether your current lender charges anything to move you off SVR onto a new product, since this is normally free, unlike an early exit from a fixed deal, which usually carries an early repayment charge.

Product transfer or full remortgage?

In short: a product transfer is faster and needs less paperwork, but only offers your existing lender's own range of deals and generally will not let you borrow more. A full remortgage opens up the whole market and is the route to take if you want to release equity or your circumstances have changed enough that a different lender might offer materially better terms, but it takes longer and needs a fresh valuation and full underwriting.

Neither option is automatically the right one. Running both side by side, using actual figures rather than headline rates, before committing is the only reliable way to know which one wins for your specific mortgage and timeframe.

Common mistakes

• Assuming the current lender's product transfer rate is competitive by default. Sometimes it is, but only comparing against the wider market confirms that rather than assuming it.
• Leaving it until after the end date to start looking. The six-month window exists for a reason, and using only the last few weeks of it removes your ability to change course if a valuation comes back lower than expected or an application stalls.
• Overlooking an early repayment charge on the current deal. If you are considering exiting before your existing fixed term technically ends, for example to lock in a better rate elsewhere early, check whether an ERC applies and whether the saving still makes sense once it is accounted for.
• Not updating rent evidence. If your rent has increased since the mortgage was last arranged, outdated rent figures can understate how much you are able to borrow.
• Treating a portfolio the same as a single property. If you own several mortgaged buy-to-let properties, most lenders treat you as a portfolio landlord and ask for more information, which takes longer to process, so build extra time into your plan.

How PropMaps helps

PropMaps logs the fixed-rate end date, lender, rate and rental figures for every mortgage in your portfolio, with reminders well ahead of each renewal, so when the moment to act arrives, the numbers you need for a product transfer or a full remortgage are already organised rather than scattered across statements and emails.

Disclaimer

This guide is general information for UK landlords, not financial or mortgage advice. Lending criteria and timescales vary by lender and change over time. Speak to a qualified mortgage broker or adviser before acting.