What moves your interest rate

Interest rates can feel like they change out of nowhere, but a handful of forces sit behind them. Knowing what they are won't tell you where rates are headed — nobody knows the next move, including us — but it does make your own AER a lot less mysterious. This is general information, not advice.

1. The Bank of England base rate

The biggest lever is the base rate — the benchmark set by the Bank of England's Monetary Policy Committee, which meets on a published schedule around eight times a year. When it changes, savings and borrowing rates across the market tend to drift in the same direction, because it's the rate banks themselves borrow and lend at. It's a reference point the whole market moves around, not a rate you're paid directly.

2. Inflation

Rates and inflation are closely linked. When prices are rising quickly, the base rate is the main tool used to cool things down, which tends to push savings and borrowing rates up; when inflation eases, that pressure comes off. It's also why your rate matters in real terms — there's a separate lesson on how to stop savings quietly losing value to inflation.

3. Competition between providers

The base rate isn't the whole story. Banks and building societies compete for deposits, and one that wants to attract savings will often pay above the base rate to stand out — while a big high-street bank sitting on plenty of deposits has little reason to. That's exactly why the best easy access rate on the market is usually nothing like the rate on an old account you've left untouched.

4. Account type, access and term

The same provider pays different rates depending on the deal. An easy access account you can dip into anytime typically pays less than a notice account (where you give warning to withdraw) or a fixed-term account (where you lock the money away for, say, one or two years). Broadly, the more access you're willing to trade, the higher the rate on offer — it's the provider rewarding certainty about how long they'll hold your money.

Put together: the base rate sets the backdrop, inflation shapes where it goes, competition decides how far a provider beats it, and the access you choose sets your own rate within that. What none of this predicts is the next decision — so rather than guess, it's worth knowing where your own rate stands today.