Cost of Living in Boston vs Seattle

When comparing the cost of living in Boston, MA and Seattle, WA, the data shows a clear difference across all major expense categories. Boston has a cost index of 162 while Seattle sits at 155 — both measured against the US national average of 100.

The average 1-bedroom apartment in Boston rents for $2,950/month, compared to $2,400/month in Seattle. That's a 19% difference in housing costs alone — the single largest expense for most households.

Beyond rent, everyday expenses like groceries, utilities, and transportation also vary significantly. Boston residents spend an average of $460/month on groceries, while Seattle residents spend $420/month. Transportation costs are $115/month in Boston versus $102/month in Seattle.

In total, the estimated monthly cost of living in Boston is $4,213, while Seattle comes in at $3,505. Over a full year, that gap amounts to $8,496 — a meaningful figure for anyone planning a relocation or comparing job offers across these two cities.

Based on current cost-of-living data, Seattle is the more affordable option. Living in Seattle costs approximately 17% less per month than Boston, saving residents around $708/month or $8,496/year.

Housing is typically the biggest driver of this difference. The lower rent in Seattle ($2,400/month) compared to Boston ($2,950/month) accounts for a significant portion of the overall savings. Utilities and groceries also tend to be lower in Seattle.

That said, cost of living is only one factor in a relocation decision. Job market conditions, salary levels, quality of life, climate, and proximity to family all play important roles. Use the calculator above to personalize these numbers based on your actual spending habits — the default figures are city averages and your individual costs may vary.

For a broader comparison, explore our City vs City Comparison Tool or check the Rent Comparison Tool to see how Boston and Seattle stack up against other US cities.