What does a cost-of-living index of 159 mean?

An index of 159 means costs in Washington DC are about 59% above the US average, which is set to 100. A salary stretches noticeably less in DC than in an average-cost city.

Which categories drive the index?

The composite blends housing, groceries, transportation, utilities, and healthcare. Housing carries the heaviest weight, and DC's expensive housing market pulls the overall index well above 100.

How do I compare two cities?

Convert a salary using each city's index. If DC is 159 and another city is 100, you would need far less income there to maintain the same standard of living.

Is this an official figure?

It is a representative composite for planning, not an official government statistic. Real costs vary by neighborhood and lifestyle, so treat the index as a directional guide.

Does the index include taxes?

Cost-of-living indices focus on consumer prices rather than income taxes. Use a separate tax tool for District income or sales tax effects.

Washington DC Cost-of-Living Index

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Compare Washington DC living costs

Washington DC sits well above the US average for everyday costs, with a composite cost-of-living index near 159 against a national baseline of 100. This tool shows how far an income stretches locally and the per-category picture behind the headline number.

How it works

A cost-of-living index expresses local prices as a percentage of the national average. To convert purchasing power between cities, you scale income by the ratio of indices:

equivalent income = your income * (target index / 100)
purchasing power  = your income * (100 / local index)

The composite is a weighted blend of housing, groceries, transportation, utilities, and healthcare, with housing weighted most heavily. Because DC housing is among the most expensive in the country, the overall index lands far above 100 even where some categories run closer to average.

Tips and example

If you earn 100000 and DC’s index is 159, your effective purchasing power equals 100000 * (100 / 159) = 62893 of an average-cost city’s dollars — a sharp cut. To match a 100000 lifestyle in an average city, you would need 100000 * (159 / 100) = 159000 of DC income.

Use the per-category bars to see where DC costs the most; housing is by far the dominant factor.