If you’re looking for a mortgage right now, you’ve probably noticed the numbers shifting faster than usual. The average two-year fixed rate sits at 5.68%, while a five-year fix is only marginally lower at 5.63%. That gap — just 0.05 percentage points — tells you something important: lenders aren’t convinced rates will drop much further in the short term, so they’re pricing long-term deals almost the same as short-term ones. For anyone trying to decide between locking in for two years or five, that tiny difference changes the maths completely.
I’ve been watching the mortgage market closely for years, and what I keep seeing is the same pattern: people focus entirely on the headline rate and ignore everything else. The fee, the revert rate, the lender’s customer score — those factors can cost you thousands more than a slightly lower interest rate saves you. This article walks through the real decisions that matter, from comparing deals properly to understanding what happens when your fix ends. Here’s what you actually need to know.
How mortgage rates actually work right now
The first thing to understand is that the headline rate isn’t the full picture. When you see a two-year fix at 4.64% from Coventry Building Society, that’s the initial rate. After two years, you’ll revert to their standard variable rate (SVR) of 6.54%. If you haven’t remortgaged by then, your monthly payment jumps significantly. The same applies to every deal in the table — the revert rate is where the real cost lives if you don’t act.
What I’d do in your position: ignore the monthly payment on the deal rate alone. Calculate what you’d pay over the full fix period including the fee, then compare that across three or four lenders. A fee-free deal from First Direct at 4.86% might actually be cheaper than Coventry’s 4.64% with a £999 fee, depending on your loan size. Run the numbers before you decide.
Why the timing of your mortgage decision matters more than you think
Lenders adjust rates twice a day — at 1am and 1pm, according to Moneyfacts data. That means a deal you saw this morning could be gone by lunchtime. In late February, lenders were forecasting a base rate cut for March and expected rates to drift down. Then in March, rates flew up. Since mid-April, the market has calmed and lenders are now cutting rates again. That volatility isn’t unusual, but it means waiting for a better rate can backfire if you miss the window.
Consider a first-time buyer with a 10% deposit looking at a 90% LTV deal. The best two-year fix fee-free is from Bank of Ireland UK at 4.99%, reverting to 6.94%. If you stretch to a 20% deposit, you could get Coventry’s 4.64% deal instead — that’s 0.35% lower, which on a £200,000 mortgage saves roughly £700 over two years before fees. The deposit size is the single biggest factor you can control, and it directly unlocks cheaper rates.
What I notice is that people often pick a two-year fix because they think rates will drop soon. But lenders are now expecting the base rate to remain flat or be revised upwards only once in 2026. If that forecast holds, a two-year fix might leave you remortgaging into a similar or higher rate anyway. A five-year fix removes that uncertainty. My personal view: if the five-year rate is within 0.1% of the two-year rate, take the longer fix and sleep better.
Where most borrowers get tripped up
The most common mistake I see is comparing deals by rate alone. A 4.64% rate with a £999 fee might look better than a 4.86% fee-free deal, but on a £150,000 mortgage over two years, the fee-free deal actually costs less. The fee adds roughly £500 per year to your cost, which wipes out the rate advantage. Always calculate the total cost over the fix period, including the fee divided by the number of years.
→ Scroll right to see all columns
| LTV | Lender | Initial Rate | Fee | Revert Rate |
|---|---|---|---|---|
| 80% | Coventry Building Society | 4.64% | £999 | 6.54% |
| 80% | First Direct | 4.86% | £0 | 6.24% |
| 90% | West Brom Building Society | 4.80% | £1,499 | 6.24% |
| 90% | Bank of Ireland UK | 4.99% | £0 | 6.94% |
Another trap: ignoring the customer score. The average across all lenders is 74%. Skipton Building Society scores 80%, while Bank of Ireland UK scores 67%. A low score doesn’t mean the lender is bad, but it often correlates with slower processing times and poorer communication. If you’re in a chain or have a mortgage offer expiring, a slow lender can cost you the property. I’d always prioritise a lender with a score above 70% unless the rate difference is substantial.
The third mistake is forgetting to remortgage before the revert rate kicks in. When your two-year fix ends, you’ll automatically switch to the SVR — often above 6%. That can add hundreds to your monthly payment. Set a calendar reminder six months before your fix ends and start shopping for a new deal. Most lenders let you secure a rate up to six months in advance.
Your step-by-step guide to finding the best deal
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Calculate your total cost across lenders
Start by listing the deals available at your LTV band. For each one, add the initial rate, the fee, and the revert rate. Multiply the initial rate by your loan amount and the fix period, then add the fee. Compare that total across three to five lenders. A financial advisor can run these comparisons for you and flag deals you might miss on comparison sites. If you’re comfortable doing it yourself, Which? and Moneyfacts both publish daily-updated tables.
Check the lender’s customer score before applying
Customer scores combine overall satisfaction with likelihood to recommend. A lender scoring 80% like Skipton is likely to process your application smoothly. One scoring 67% might be cheaper but could cause delays. If you’re in a competitive buying situation, the smoother process is worth paying a bit more for. You can check scores on Which?’s site alongside the rate tables.
Secure a rate early and watch for drops
Most lenders let you lock in a rate up to six months before completion. If rates fall after you’ve secured one, you can often switch to the lower rate without reapplying — but check the lender’s policy. Some charge a fee to change. A property lawyer can review the terms of your mortgage offer and advise on any penalties for switching before completion.
Plan your remortgage before the fix ends
Set a reminder six months before your current fix expires. Start comparing deals at that point. You can secure a new rate up to six months ahead, so you avoid the revert rate entirely. If you leave it to the last month, you risk landing on the SVR — which at 6.24% or higher could cost you hundreds per month. A real estate lawyer can also help if your remortgage involves complex circumstances like a change in property use or a transfer of equity.
Frequently asked questions
Can I switch lenders before my fix ends? ▾
What happens if my mortgage offer expires before I complete? ▾
Is a 95% LTV mortgage worth it? ▾
Should I use a mortgage broker or go direct? ▾
How often do mortgage rates change? ▾
Your next move
The mortgage market is volatile, but the fundamentals haven’t changed: compare total cost, not just the rate; prioritise lenders with strong customer scores; and secure a rate early to avoid the revert rate trap. Right now, with two-year and five-year fixes priced almost identically, the longer fix gives you certainty without costing more. Start by checking the best rates at your LTV band, then run the total cost calculation across three lenders. If this was useful, you might also want to read Rent vs Buy in the UK: A Personalized Decision Guide.
Sources and Further Reading
Bridging the Gap: Innovative Ways to Save for a Deposit in the UK — Practical strategies for building a bigger deposit, which directly unlocks cheaper mortgage rates.
Best mortgage rates and deals. Which?, 2025.
Mortgage Maze — mortgage services. Charles Frank Finance Ltd, FCA number 624668.
