You should start your remortgage process six months before your current fixed-rate deal expires. This timeframe allows you to secure a new interest rate as a safety net while providing enough time to complete the legal and administrative work required for a switch.
Beginning early ensures you avoid falling onto your lender’s Standard Variable Rate (SVR), which is significantly more expensive. Bank Rate was 3.75% when this article was published in July 2026, and whatever the rate environment, proactive planning is the best way to manage your household budget.
Why the 6-month window is the 'Golden Rule'
Most UK lenders issue mortgage offers that remain valid for up to six months. By applying at the half-year mark, you essentially 'reserve' a rate.
If interest rates rise during those six months, your lower rate is already locked in. However, if rates fall, most lenders allow you to ditch the initial offer and move to a cheaper one before the old deal ends.
Starting early also provides a buffer for the legal process. While a remortgage is usually faster than a purchase, it still involves property valuations and title checks that can take several weeks.
The cost of waiting: SVR vs New Fixed Rates
When your fixed deal ends, you are automatically moved to your lender's SVR if you haven't arranged a new product. SVRs are typically several percentage points above new fixed-rate deals. The table below is illustrative only, not current product rates.
| Mortgage Type | Illustrative Rate | Monthly Payment (£200k Loan) |
|---|---|---|
| 5-Year Fixed Rate | 4.2% | £1,078 |
| 2-Year Fixed Rate | 4.6% | £1,123 |
| Standard Variable Rate (SVR) | 8.0% | £1,544 |
Waiting until the last month could cost you over £400 per month in additional interest while you wait for a new application to be processed. You can check your potential new payments using our /calculators.
Product Transfer vs Remortgaging to a New Lender
There are two main ways to move off your current deal. The right choice depends on your equity, credit score, and current market offers.
1. Product Transfer
This is staying with your current lender but moving to a new rate.
- Timeline: Usually available 3–4 months before your deal ends.
- Pros: No new credit checks, no legal fees, and no property valuation.
- Cons: You are limited to one lender's range, which may not be the cheapest.
2. Remortgaging to a New Lender
This involves moving your debt to an entirely different bank or building society.
- Timeline: Start 6 months before your deal ends.
- Pros: Access to over 90 lenders and a far wider choice of rates.
- Cons: Requires a full application, credit check, and legal work (though many deals include 'free legals').
Pro Tip: Don't assume your current lender will give you the best deal for being loyal. Always compare a comprehensive panel of lenders at the 6-month mark to ensure your 'loyalty' isn't costing you thousands.
How the process works: Step-by-Step
- Month 6: Contact a broker to review your options and check your credit file. Secure a 'safety net' rate.
- Month 5: Receive your formal mortgage offer. Your broker monitors the market for any rate drops.
- Month 4: If better rates appear, we resubmit the application or switch products.
- Month 2: The solicitors (if switching lenders) perform final checks and request a redemption statement from your old bank.
- Completion Day: Your new mortgage starts the day after your old one expires. No Early Repayment Charges (ERCs) are paid.
Dealing with Early Repayment Charges (ERCs)
Most fixed-rate mortgages carry an ERC if you leave the deal early. This is usually a percentage of the loan balance, often ranging from 1% to 5%.
We generally recommend timing your new mortgage to start the very day after your current deal expires. By securing an offer 6 months in advance, you can specify this future completion date, ensuring you don't pay a penny in exit fees while still benefiting from an early rate lock.
What if your circumstances have changed?
If you have changed jobs, become self-employed, or seen a change in your credit score since you last took out a mortgage, starting early is even more critical. The 2026 mortgage market remains competitive, but lenders are diligent about affordability.
If you are a /first-time-buyer who is reaching the end of their very first 2-year fix, you might find that your 'Loan to Value' (LTV) has improved because your house value has risen. This could move you into a lower interest rate bracket.
Pro Tip: If your property has increased in value, a new valuation during a remortgage could unlock much cheaper rates by moving you from, say, a 90% LTV to an 85% LTV deal.
My Personal Practical Advice
When I sit down with my clients, I often see the stress caused by leaving things to the last minute. The most common mistake is thinking you have to wait until your current deal has almost finished before you can even look at the market.
I tell everyone the same thing: A mortgage offer is an insurance policy. If you secure a rate today and prices go up tomorrow, you’ve won. If prices go down tomorrow, we simply cancel the first offer and take the better one. There is no downside to being early, but there is a massive financial downside to being late.
— Matt
How we help you secure a suitable deal
At The Mortgage Genie, we have access to over 90 lenders, including those who do not deal directly with the public. We provide free initial advice to help you understand your options 6 months out. If you decide to proceed, we manage the entire switch for you, from application to completion.
Our team monitors the market daily. If we secure a rate for you in month 6, but a better deal from that same lender launched in month 2, we will proactively switch you to the cheaper product before you even start paying it.
Ready to see what you could save? Visit our /services/remortgage page or view our latest /best-mortgage-rates to get started. You can also read more about protecting your home or explore our comprehensive mortgage guides for more detail.
Contact us today via our /contact page to speak with an expert and lock in your next rate.