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HEAD-TO-HEAD TAX COMPARISON · 2026

COUNTRY A Washington State VS COUNTRY B Massachusetts

Side-by-side analysis of income tax, effective rates, and take-home pay for Washington State and Massachusetts in 2026.

Daniel · CountryTaxCalc Updated June 2026 Tax Comparison 2026
Calculate your take-home → See all comparisons →
OVERVIEW
Washington State has no state income tax (0%), while Massachusetts charges a flat 5% on most income, rising to 9% on income above $1,000,000 (the 4% 'millionaire surtax' added by 2022 ballot initiative). At $100,000, Washington State saves approximately $4,750/year. Both states are major tech/biotech hubs — Seattle (Amazon, Microsoft) and Boston/Cambridge (biotech, Harvard, MIT corridor). Massachusetts has lower housing costs than Seattle in some areas, but Boston proper is equally expensive. Washington State wins clearly on income taxes for earners under $1M; the gap expands dramatically for million-dollar earners.
Section 01

The Big Picture

Top-line rates and effective take-home for a typical earner — including income tax, social contributions, and applicable surcharges.

🌲
COUNTRY A
Washington State
TAX RATE
0%
No Income Tax
No state income tax (never had one, unconstitutional)
🦞
COUNTRY B
Massachusetts
TAX RATE
5-9%
Flat + Surtax
5% flat rate plus 4% millionaire surtax above $1M
TYPICAL ANNUAL DIFFERENCE
Moving from Massachusetts → Washington State at $100,000
$4,750
That's $396/month back in your pocket
Section 02

Tax Savings by Income Level

Net take-home after all income tax, social contributions, and surcharges — for a single employee with no dependents.
GROSS INCOME
🌲 WA TAX
🦞 MA TAX
SAVINGS
10-YEAR
$50,000
$0
$2,375
$2,375
$23,750
$100,000
$0
$4,750
$4,750
$47,500
$200,000
$0
$9,500
$9,500
$95,000
$1,000,000
$0
$87,500
$87,500
$875,000
💡

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🌲

Washington State Pros & Cons

+ PROS
  • Zero income tax: Save $4,750/year on $100k, $9,500 on $200k, $87,500 on $1M
  • No millionaire surtax: WA has 7% capital gains tax above $262k but no 9% income surtax
  • Amazon, Microsoft, Boeing — world-class salaries competitive with Boston tech
  • No retirement income tax: All retirement income untaxed at state level
  • Lower property tax: ~1.03% (vs MA ~1.14%) — similar but WA slightly lower
− CONS
  • Very expensive housing: Seattle median ~$780k; Boston metro also ~$700k-$800k (similar)
  • Higher sales tax: 10.1-10.5% Seattle (MA has only 6.25% with no local add-ons)
  • Business & Occupation tax affects contractors and self-employed
  • Rainy winters: Seattle averages 150+ cloudy days per year
  • 7% capital gains tax on gains above $262k (since 2023) — affects investors
🦞

Massachusetts Pros & Cons

+ PROS
  • World-class universities: Harvard, MIT, Boston University, Tufts, Northeastern nearby
  • Biotech corridor: Kendall Square is global biotech capital — exceptional life sciences jobs
  • Lower sales tax: 6.25% (vs Seattle 10.1-10.5%) saves $500-$1,000/year on spending
  • Historic culture: Freedom Trail, Red Sox, world-class museums, four seasons
  • Strong public schools: MA consistently ranks #1 nationally for K-12 education
− CONS
  • Income tax: 5% flat costs $4,750/year on $100k; rises to 9% (total) above $1M
  • Millionaire surtax: 4% additional rate on income above $1M (passed via 2022 ballot)
  • Expensive housing: Boston metro median $700k-$800k (similar to Seattle)
  • High sales tax by East Coast standards: 6.25% (lower than WA, but higher than NH 0%)
  • Traffic: Mass Pike, I-93 among worst commutes in northeastern US
FAQ

Frequently Asked Questions

What is the Massachusetts millionaire surtax?

Massachusetts voters approved a 4% surtax on income above $1,000,000 in November 2022 (effective 2023). Combined with the base 5% flat rate, millionaires in MA pay 9% on income above $1M. On $2,000,000 income: $1M × 5% + $1M × 9% = $50,000 + $90,000 = $140,000 in MA income tax. Washington State: $0 in income tax. The surtax has driven some high earners to relocate — particularly to Florida, New Hampshire, and Washington State.

Boston vs Seattle: which is better for tech workers?

Seattle wins on income tax (save $4,750+/year on $100k salary). Boston wins on: biotech/life sciences career opportunities, Ivy League alumni networks, East Coast culture, lower sales tax (6.25% vs 10.1%). Housing costs are similar ($700k-$800k median in both). Tech salary differences are narrowing — Boston AI/biotech salaries now rival Seattle. The decision often comes down to field: software engineering/cloud → Seattle advantage; biotech/life sciences → Boston advantage.

Does Massachusetts have any tax advantages over Washington State?

Massachusetts has several tax advantages over Washington State: (1) Much lower sales tax: 6.25% flat (no local additions) vs Seattle's 10.1-10.5% — saves $500-$1,000/year for average households. (2) No Business & Occupation tax on gross receipts. (3) Similar property tax rates (~1.14% vs WA 1.03% — very close). But income tax completely reverses these: MA's 5% costs $4,750/year on $100k vs WA's $0, meaning income tax dominates for most earners.

How does the WA capital gains tax compare to MA income tax for investors?

Washington State has a 7% tax on long-term capital gains above $262,000/year (enacted 2023). Massachusetts taxes capital gains as ordinary income at 5% (or 8.5% for short-term gains held under 1 year). For an investor with $500,000 in long-term capital gains: WA taxes ($500k - $262k) × 7% = $16,660. MA taxes $500k × 5% = $25,000. Washington State still wins for capital gains investors — but the gap is narrower than for wage earners.
From the brief
CY0%dividends, 60-day rule
PT20%flat rate, tech workers
GB39%non-dom regime gone
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