Lock In Your Mortgage Rate Now: Fixed Deals Are Your Insurance Against a World on Fire

Six months ago, the mortgage market looked benign. The Bank of England had been steadily unwinding its post-pandemic tightening cycle. The Bank of England had cut rates four times from their 5.25% peak, bringing base rate down to 3.75% by December 2025. Two-year swap rates sat around 3.36% at the end of February. Lenders were competing on price, sub-4% fixes existed, and the mood was optimistic.

Then the Middle East conflict began. The price of Brent crude has risen more than 50% in a month. Gas prices hit a three-year high after a retaliatory strike on a Qatari gas facility. Energy bills, which were already set to rise in July, could now approach £2,000 a year.

All of this feeds directly into inflation expectations. The latest ONS data already showed CPI inching higher before the conflict began, and energy-driven price rises will only accelerate this trend. And inflation expectations feed directly into swap rates. Two-year swaps now sit at 4.21%, up from 3.36% on 27 February — an 85 basis point jump in under a month. Five-year swaps are at 4.13%, up from 3.41%.

According to Moneyfacts analysis, average mortgage rates tend to stabilise around 1.5 percentage points above the base rate. If base rate hits 4.25% — which markets are now pricing in — average mortgage rates could settle around 5.75%. On a £250,000 mortgage over 25 years, that's an extra £1,000 to £1,500 a year compared to what you'd have paid in January.

Yes, <a href="/posts/dont-panic-buy-a-fixed-mortgage-trackers-are-cheaper-and-the-market-is-pricing">tracker</a> mortgages are the cheapest deals on the market right now. A typical tracker might charge base rate plus 0.75%, giving you an initial rate around 4.50% — well below the 5.35% average on a two-year fix.

That discount is real. But it only persists if the base rate stays where it is — or falls. And the market is now telling you, loudly, that neither scenario is likely.

Consider the maths. The Bank of England's own mortgage data shows tracker rates tracking base rate plus a margin, with no ceiling protection. If the Bank of England raises rates twice this year — to 4.25% by autumn, as swap markets imply — your tracker rate jumps to 5.00%. If energy costs keep climbing and the BoE is forced into a third hike to 4.50%, you're paying 5.25% with no ceiling and no certainty. Your monthly payments on that £250,000 mortgage would have risen by roughly £150 a month compared to where you started.

The whole point of a tracker is that you accept volatility in exchange for a lower starting rate. That trade-off made sense when rates were falling. It makes no sense when they're rising — and rising for reasons (geopolitical conflict, energy shocks) that are fundamentally unpredictable.

As our analysis of why borrowers should prepare for 5%+ deals explained yesterday, the era of falling mortgage rates is over for now.

The typical tracker borrower saves around £1,488 a year at today's rates. But that saving evaporates with a single 0.75 percentage point hike — and markets are pricing in more than that. The risk-reward calculation has shifted decisively against variable rate products for borrowers without substantial financial buffers.

We've been here before. After the September 2022 mini-budget, two-year swap rates spiked to 5.75% even though the base rate was only 2.25%. Mortgage products were pulled overnight. Borrowers who hadn't locked in found themselves scrambling for deals that no longer existed.

The current situation isn't as extreme — two-year swaps are at 4.21%, not 5.75%. But the pattern is the same: an external shock driving swap rates upward faster than anyone expected, with mortgage repricing following within days rather than the usual one-to-two week lag.

The Guardian reported that lenders are pulling and repricing deals at record speed because nobody wants to be caught offering the cheapest product in a market this volatile. That's the environment you're operating in. Fixed rate deals available today genuinely might not be available next week — and the replacements will be more expensive.

You can lock in a mortgage rate up to six months in advance with most lenders, often with no obligation to proceed. That option costs you nothing. Not locking in could cost you thousands.

The speed of repricing matters. During the Truss crisis, borrowers who hesitated even a week found themselves locked out of deals they'd been quoted days earlier. The same pattern is repeating now — and with the added uncertainty of an active military conflict, the risk of further escalation (and further rate spikes) is not hypothetical.

A fixed rate mortgage isn't just a financial product. See <a href="/posts/mortgage-guide-uk-mortgage-rates-explained-fixed-vs-variable-how-they-work-and-what-to-expect-in-2026">how UK mortgage rates work</a> for more details. It's a household planning tool.

When your mortgage payment is fixed at £1,450 a month, you know what you're working with. You can budget for the energy bill increases, the council tax rises, the cost-of-living squeeze that's about to intensify. You can absorb one shock because you've insulated yourself from another.

On a tracker, every Bank of England meeting becomes a source of anxiety. Every inflation print matters. Every geopolitical escalation — and we're in the middle of an active conflict with no clear endpoint — feeds into whether your biggest monthly outgoing is about to jump.

The BoE held at 3.75% yesterday but explicitly said it's ready to raise rates if the Iran-driven energy shock feeds through into persistent inflation. That's not reassurance. That's a warning.

The Money Helper service run by the Money and Pensions Service advises borrowers to consider their risk tolerance carefully. For most borrowers — especially those stretching to buy a first home or <a href="/posts/mortgage-guide-remortgaging-uk-2026-when-to-switch-how-to-compare-deals-and-what-it-costs">remortgaging</a> onto higher rates after a sub-2% pandemic deal — payment certainty isn't a luxury. It's a necessity.

If you're going to fix, the next question is for how long.

Right now, two-year and five-year average rates are almost identical — 5.35% and 5.39% respectively. That near-parity is unusual and telling. It means the market doesn't expect rates to fall significantly over the next five years.

In normal times, I'd say fix for two years and reassess. But these aren't normal times. A two-year fix rolls off in early 2028 — and if the conflict has dragged on, if inflation has remained sticky, if the BoE has been forced into multiple hikes, you could be remortgaging into an even worse market.

A five-year fix at 5.39% gives you certainty through to 2031. That covers the likely duration of any economic disruption from the current conflict, plus any fallout. If rates fall faster than expected, you can often remortgage early — most five-year fixes allow this after an initial lock-in period, with early repayment charges that taper over time.

The five-year fix is the insurance policy. You're paying a small premium over the tracker rate today in exchange for protection against a scenario where rates go significantly higher. Given everything happening in the world right now, that premium is cheap.

For a deeper look at our mortgages hub including calculator tools and rate comparisons, visit our dedicated section.

This article is for informational purposes only and does not constitute financial advice. You should seek independent financial advice before making any investment or mortgage decisions.

One tactical note: if you're within six months of your current deal ending, start the application process now. You can typically lock in a rate with no commitment, and if rates happen to fall before completion, you can apply again at the lower rate. There is no downside to securing a rate offer today — only upside protection against further increases.