Fixed Deposits — The Dollar Dictionary

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Finance

Fixed Deposits

A savings product where you lock a sum of money with a bank for a fixed period at a guaranteed interest rate — typically earning more than easy-access accounts in exchange for reduced flexibility.

Fixed deposit terms range from 1 month to 5 years — longer terms generally (but not always) offer higher rates. The yield curve determines the relationship: when the yield curve is normal (upward sloping), longer terms pay more. When it's inverted (as it was in 2023-2024 in the UK and US), shorter-term deposits can actually pay more than longer ones — meaning locking in long-term was less rewarding than rolling over short-term deposits repeatedly.

Key considerations: early withdrawal penalties (most fixed deposits don't allow early access at all, or charge a significant interest penalty — typically 90-180 days of interest forfeited), FSCS protection (£85,000 per person per institution — spread large sums across multiple providers to maintain full protection), rate comparison (use comparison sites to find the best rates — loyalty to one bank almost never results in the best fixed deposit rate), and interest payment timing (some pay interest monthly, some annually, some at maturity — which you choose affects cash flow and tax treatment if interest pushes you over your Personal Savings Allowance).

A fixed deposit is a deal with your bank: you promise not to touch the money for a set period, and the bank promises to pay you a higher interest rate as a reward for that commitment. The bank values your guaranteed deposit because it can plan around it. You value the guaranteed rate because you know exactly what you'll earn regardless of what interest rates do during the period. Both sides get certainty — which is exactly what both sides want.

Real world: In the UK, fixed-rate savings bonds (the retail equivalent of fixed deposits) from challenger banks like Shawbrook, Aldermore, and Atom Bank consistently offer among the highest rates available. In 2023-2024, 1-year fixed deposits were offering 5-5.5% while easy-access accounts paid 3.5-4.5%. On £20,000, locking in a 1-year fix at 5.5% earns £1,100 — versus £900 in easy access. The extra £200 requires only the willingness to not touch the money for 12 months, which for an emergency fund buffer most people shouldn't need anyway.

💡 A fixed deposit is the simplest interest-rate upgrade available — commit to leaving money untouched for a defined period and the bank pays you meaningfully more than it would if you insisted on instant access.

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