To keep the same standard of living as $100,000 in Boston, you'd need about $99,900 in San Diego — a $100 saving per year.
Estimated monthly spending for a middle-income household, adjusted by each metro's BEA price level.
The salary you'd need in San Diego to maintain the same purchasing power as each income level in Boston, using the BEA price ratio of 0.999.
| Salary in Boston | Equivalent in San Diego | Difference |
|---|---|---|
| $50,000 | $50,000 | +$0 |
| $75,000 | $74,900 | −$100 |
| $100,000 | $99,900 | −$100 |
| $150,000 | $149,900 | −$100 |
| $200,000 | $199,800 | −$200 |
Moving from Boston, MA to San Diego, CA means your everyday costs are cheaper by roughly 0.1%. The U.S. Bureau of Economic Analysis measures Boston's overall price level at 111.6 and San Diego's at 111.5, where 100 represents the national average. In practical terms, a household spending $5,729 per month in Boston would spend about $5,725 for the equivalent lifestyle in San Diego — a swing of $4 every month, or $48 per year.
Housing is the decisive factor. Estimated monthly housing runs $2,538 in Boston against $2,535 in San Diego. Because rent and mortgage costs vary far more between metros than groceries or utilities, the housing line alone accounts for most of the 0.1% gap.
For salary negotiation or a remote-work relocation, the key number is the equivalent salary. A $100,000 income in Boston has the same purchasing power as $99,900 in San Diego. Looked at the other way, $100,000 in San Diego is worth about $100,100 in Boston terms. Use the Cost of Living Calculator to plug in your own expenses.
Price levels don't include income tax, which can significantly swing your real take-home pay — especially between MA and CA.
San Diego is 0.1% cheaper than Boston overall. Based on the U.S. Bureau of Economic Analysis Regional Price Parities (2023), Boston has a price level of 111.6 versus 111.5 for San Diego, where 100 equals the national average.
To maintain the same purchasing power as a $100,000 salary in Boston, you would need about $99,900 in San Diego — a difference of $100 per year.
Estimated monthly housing runs about $2,538 in Boston versus $2,535 in San Diego. Housing is the single biggest driver of the cost-of-living gap between the two metros.
Sources & methodology
Price levels use the U.S. Bureau of Economic Analysis Regional Price Parities for metropolitan areas (2023, the most recent metro-level release). Boston maps to the Boston-Cambridge-Newton, MA-NH MSA; San Diego maps to the San Diego-Chula Vista-Carlsbad, CA MSA. Category spending baselines come from the U.S. Bureau of Labor Statistics Consumer Expenditure Survey. Category-level figures are modeled estimates and are illustrative; actual costs vary by household. This is a planning tool, not financial advice.
