---
title: Inflation — what it means and why it matters | Allocate AI
description: The general rise in prices over time, which means each dollar buys a little less every year and savings must grow just to keep their value.
canonical: https://allocateai.io/glossary/inflation
site: Allocate AI — https://allocateai.io
---

# Inflation

The general rise in prices over time, which means each dollar buys a little less every year and savings must grow just to keep their value.

Inflation is the slow rise of prices across the economy. When it runs at 3%, something that costs $100 today costs $103 next year and about $134 in ten years. The dollar bill did not change; what it buys did. The Federal Reserve targets about 2% per year, though recent years have run higher.

The effect on savings is quiet but large. Cash in a drawer loses about a third of its purchasing power over a decade at 3% inflation. A savings account paying 1% when inflation is 3% is losing 2% a year in real terms even as the balance grows. This is the reason for investing at all: to earn more than inflation so money keeps its worth.

Inflation also reshapes long plans. A retirement budget of $60,000 a year in today's dollars needs to be about $108,000 a year in 20 years at 3% inflation. The 4% rule handles this by raising withdrawals with inflation each year, which is why it needs a portfolio that grows.

Salary needs the same lens. A 3% raise in a 3% inflation year is a raise of zero. A 2% raise is a pay cut.

The common mistake is planning in nominal dollars, comparing a figure ten years from now with one today as if they were equal. Any long-range number, from a retirement target to a college fund, should be stated in today's dollars or explicitly grown for inflation.

[Try the Time Value of Money Calculator →](https://allocateai.io/calculators/time-value)

## Related terms

- [Real vs nominal return](https://allocateai.io/glossary/real-vs-nominal-return) — A nominal return is the headline growth figure; a real return subtracts inflation to show how much your buying power actually grew.
- [Time value of money](https://allocateai.io/glossary/time-value-of-money) — The idea that a dollar today is worth more than a dollar later, because today's dollar can be invested and grow in the meantime.
- [Safe withdrawal rate (the 4% rule)](https://allocateai.io/glossary/safe-withdrawal-rate) — The percentage of a portfolio you can spend each year, adjusted for inflation, with a good chance it lasts 30 years; the classic estimate is 4%.

**Plan in plain language.**

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Allocate AI is a budgeting and financial-planning app: link your accounts, say what you want in plain words, and it writes the plan and stages every change for your approval. Read more at https://allocateai.io or see all pages in https://allocateai.io/llms.txt.