Why a hold isn't the safe assumption it was a month ago
Tomorrow at 11am, the Bank of England's Monetary Policy Committee announces whether the base rate stays at 3.75% or moves for the first time since December 2025. A month ago this would barely have been worth writing about — economists were unanimous that rates would hold, and most expected the next move, whenever it came, to be a cut. That consensus has cracked. Financial markets were pricing a 30% chance of a quarter-point hike on 17 September as of Monday, up from under 10% a week earlier, and were close to fully pricing a hike by the November meeting instead.
The reason sits a long way from Threadneedle Street. Oil prices have pushed past $100 a barrel as the US-Israel war with Iran keeps disrupting supply, and that is feeding straight into UK inflation. CPI came in at 2.9% for the year to July, up from 2.6% the month before, and City analysts expect the August figure to land closer to 3.1% when it's published. Goldman Sachs has revised its own forecast to show inflation peaking at 3.9% in early 2027 — a full half-point higher than its previous call — and now treats a hike to 4.00% in November as its base case rather than a tail risk.
What the Bank itself is saying
Governor Andrew Bailey pushed back on the idea that a rise is already decided, telling reporters there is no "secret plan" to raise rates unless the current oil-driven cost pressure turns into something more lasting — wages rising to match higher bills, or price increases spreading well beyond energy and fuel. That's a real bar, not a formality. It also means the outcome genuinely hinges on data nobody has seen yet, which is exactly why traders keep revising their odds week to week rather than settling on one.
What Thursday's vote actually decides
Reuters' poll of economists this month found unanimous agreement that the Bank holds at 3.75%, with most expecting the same 6-3 split as July. That vote is worth understanding rather than just quoting, because it shows the direction of travel. In July, Chief Economist Huw Pill, Megan Greene and Catherine Mann all voted for an immediate quarter-point rise to 4.00%, with Mann switching from the "hold" side the meeting before. That's a hawkish drift that has widened at every meeting since March, and it's the reason a hold this week wouldn't settle anything — it would just delay the same argument to November, this time with two more months of energy data behind it.
A quarter-point sounds trivial written down. On a £200,000 tracker mortgage it's roughly £29 more a month, and it moves the moment the decision is announced rather than at your next renewal.
What a hold — or a hike — actually changes for your mortgage
The honest answer for most people is: less than you'd think, and the reason why matters more than the number itself.
If you're on a fixed rate
Around 87% of UK mortgage holders are on fixed deals, and for them Thursday's announcement changes precisely nothing about this month's payment. What it does affect is the rate on offer for your next deal, and lenders have already been pricing in the risk of a hike for weeks rather than waiting for the actual vote. The average new two-year fixed rate hit 5.62% as of 30 July, up from 4.83% at the start of March; five-year fixes averaged 5.66%, up from 4.95% over the same stretch. Neither of those moves needed Thursday to happen — they happened because swap rates, which lenders actually price against, had already absorbed the higher odds of a hike.
Roughly 800,000 fixed-rate deals priced at 3% or below are due to expire every year until the end of 2027, and those borrowers are facing a jump in repayments whatever the Bank decides this week. If your current deal ends within six months, don't wait for the announcement to start comparing rates — most lenders let you lock a new rate up to six months ahead, and the pricing you see today already reflects the market's current guess about Thursday, not a guess it's about to make.
If you're on a tracker or standard variable rate
Around 500,000 homeowners are on mortgages that track the base rate directly, and for them a hike lands in the next payment, not the next renewal. Another 500,000 sit on their lender's standard variable rate (SVR), which usually follows the base rate but on the lender's own timetable rather than automatically. The average two-year tracker currently runs at 4.51% — genuinely cheaper than the average new fixed deal, which tells you something about how much of the expected hike is already baked into fixed pricing. If you're on a tracker purely because you assumed rates were heading down this year, that assumption no longer holds, and it's worth pricing up a five-year fix properly rather than treating the tracker as the default.
Savers: the decision you don't need to wait for
Here's the part most coverage of Thursday's vote misses entirely.
Fixed savings rates, like fixed mortgage rates, move on swap-rate expectations rather than on the base rate itself, and they've already climbed well past where the base rate sits. GB Bank was offering 4.91% on a one-year fixed bond, 4.98% on two years, 5.02% on three years and 5.03% on five years as of 10 September — all comfortably above the 3.75% base rate, and none of them waiting on Thursday's outcome to be worth taking. The average one-year fixed bond rate reached 4.28% by early September, its highest in almost two years, according to Moneyfacts. Notice accounts have moved too: RCI Bank pays 4.00% on 14 days' notice, Kent Reliance 4.25% on 60 days, and Bank of London and the Middle East an expected profit rate of 4.37% on 90 days.
Compare that with what's still sitting in easy-access accounts and cash ISAs paying closer to the average: 2.55% for easy access on £10,000, and 2.73% for an easy-access cash ISA. If a chunk of your savings hasn't moved in over a year and you don't need to touch it for twelve months, a fixed bond at 4.9%+ is the better home for it — not "might be worth considering", the actual better choice given what's on the table right now. The one exception is money you might genuinely need at short notice: don't lock away your emergency fund chasing an extra percentage point, because the penalty for breaking a fixed bond early usually wipes out the gain several times over.
What to actually do this week
None of this requires waiting to see what nine people in London decide tomorrow morning. The pricing has already moved, and Thursday mostly confirms or slightly adjusts a picture the market has been drawing since the oil price started climbing.
- If your fixed mortgage deal ends in the next six months, get a rate locked in now rather than after the announcement — most lenders hold the offer for three to six months, so there's no cost to securing today's price even if you don't need it yet.
- If you're on a tracker or SVR and staying there on the assumption rates were about to fall, that assumption is the thing to re-check, not your mortgage itself.
- Move idle cash out of an easy-access account paying 2.5% and into a fixed bond above 4.9%, provided you're genuinely comfortable not touching it for the term.
- Keep three to six months of essential spending in easy access regardless of what the fixed rates are doing — liquidity has a price, and that price is worth paying for the money you might actually need.
- Check whether your notice account or cash ISA has quietly fallen behind the market since you opened it — providers rarely write to tell you a better rate has appeared elsewhere.
The MPC will publish its minutes alongside the decision, and those are worth a glance even if the headline is "held" — the language on wage growth and energy pass-through is what will move November's odds, and November is now genuinely live in a way it wasn't a month ago.