Trading term

What is Nominal rate?

A nominal rate is the interest rate as quoted — the number on the advert, the statement or the loan agreement, before inflation is taken out. It tells you how many more dollars you'll have, not how much more you'll be able to buy.

Every rate you see quoted anywhere is nominal. The 4.21% US policy rate in 2025, the 6.60% mortgage, the 21.22% credit card. All nominal. It's the plain contractual number, and it's what your payments are actually computed from.

A nominal rate is incomplete in two separate directions, and the two are easy to mix up. Measure it against inflation and you get the real rate, which is what the money buys. Measure it against how often the interest compounds and you get the APY, which is what a year of it is worth. So a single advertised 5% can be three different numbers: 5% nominal, 5.1162% APY if it compounds monthly, and 1.94% real if prices rise 3% that year.

None of that makes nominal a lesser number. It's what you are contractually paid or charged, so it's the right one for working out a payment. The trouble starts when nominal rates from different eras get lined up next to each other. The 16.38% the US policy rate averaged in 1981 looks like a gift to a saver, right up until you ask what inflation was doing that year.

For example

A savings account advertises 5%. Compounded monthly, you actually earn 5.1162% — that's the APY. If prices rise 3% that year, you end up 1.94% better off in real terms. One deposit, three honest numbers.

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Why it matters to you

Nominal is the number every financial product is sold on, so it's the number in the advert, the comparison table and the headline. It's also the only one of the three that tells you nothing by itself. Two follow-up questions fix that: how often does it compound, and what's inflation doing? Answer both and a quote turns into a fact you can compare.

⚠ Two nominal rates from different years aren't the same unit

People compare today's mortgage rate to their parents' and conclude something about who had it easier. On nominal numbers alone that comparison can't be made. Prices were rising at different speeds in the two years, so the same printed percentage meant different things. Adjust both for inflation before you put them side by side.

Frequently asked questions

What does nominal interest rate mean?

It means the rate as stated, with no adjustment for inflation. It's the number on the loan agreement or the savings advert, and the number your interest payments are calculated from.

What's the difference between a nominal rate and APR?

APR is a nominal annual rate, and in most consumer-lending rules it also has to include certain required fees, so it reflects the cost of the loan rather than the interest alone. Neither one adjusts for inflation, and neither one accounts for compounding frequency. That last job belongs to APY.

Is my savings rate nominal or real?

Nominal, always. Banks quote nominal rates and APYs because those are known in advance. Nobody knows what inflation will be over the next year, so a real rate can only be worked out afterwards.

If real rates are what count, why do nominal rates matter?

Because you're paid and charged in nominal terms. The interest on your mortgage is computed from the nominal rate, not from an inflation-adjusted one. Nominal decides the cash flow; real decides whether that cash flow got you anywhere.

Read the full guide

How markets workWhat Is an Interest Rate? Who Sets It, and Why It Moves Your MoneyAn interest rate is the price of borrowing money for a year. Who sets it, why it moves, and why everything you own gets repriced when it does.12 min read

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