St. Louis vs Boston Cost of Living
Boston is approximately 34.1% more expensive than St. Louis. See salary equivalence, taxes, and side-by-side breakdown.
St. Louis, MO
Boston, MA
| Salary in St. Louis | Equivalent in Boston | Difference |
|---|---|---|
| $50,000 | $67,000 | +$17,000 (+34.0%) |
| $75,000 | $100,500 | +$25,500 (+34.0%) |
| $100,000 | $134,100 | +$34,100 (+34.1%) |
| $150,000 | $201,100 | +$51,100 (+34.1%) |
| $200,000 | $268,100 | +$68,100 (+34.1%) |
St. Louis vs Boston: which is more affordable?
On an overall cost-of-living basis, Boston is 34.1% more expensive than St. Louis. That means if you currently spend $5,000/month in St. Louis, you'd spend approximately $6,703 for the same lifestyle in Boston. Or: $100,000 in St. Louis ≈ $134,066 in Boston for equivalent purchasing power.
These multipliers are based on Bureau of Economic Analysis Regional Price Parities and reflect average housing, food, transportation, and services costs. Real personal costs vary by neighborhood (urban core vs suburb), housing choice (rent vs own, apartment vs house), and lifestyle (frequency of dining out, car-dependent vs transit, etc.).
Tax differences
Both Missouri and Massachusetts levy state income taxes (typical effective rate ~5% at middle incomes). Tax burden is roughly comparable.
City local taxes: St. Louis 1.00% vs Boston no local tax.
What costs more (and less) in Boston
Cost of living differences are driven mostly by housing — typically the biggest expense category. Boston's housing index (1.10×) compared to St. Louis's (0.54×) is the dominant factor.
Food, groceries, and transportation typically vary 5–15% between metros — much less than housing. For a couple moving from St. Louis to Boston, expect roughly:
- Rent / mortgage: 104% higher
- Groceries: 19% higher
- Transportation: 14% higher
- Healthcare, services: roughly proportional to overall index
Things this calculator can't fully capture
- Quality-of-life: weather, walkability, school quality, crime rates, commute times — not in the index.
- Career opportunities: a metro with higher cost-of-living often pays correspondingly higher salaries for the same role. See our salary calculator by job and city.
- Family situation: childcare, school district, eldercare costs vary independently of overall index.
- Lifestyle preferences: a frugal renter pays less than the index suggests; a property owner in a hot market might pay much more.
Related tools
St. Louis Paycheck Calculator — exact take-home in St. Louis. Boston Paycheck Calculator — exact take-home in Boston. Salary Calculator — hourly ↔ annual conversion. Inflation Calculator — purchasing power over time. Mortgage Calculator — what you can afford.