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FDIC national average as of October 1, 2026 via FRED · top APYs reviewed September 2026

Best High-Yield Savings Accounts in Massachusetts

Top APYs around 4.2% for Massachusetts residents — 11× the national average of 0.38%. Account for Massachusetts's 5% state tax to see your real after-tax yield.

HYSA APY Snapshot — Massachusetts

Top-tier online banks offer the same APYs nationwide. The state difference is what you keep after taxes.

Top HYSA APY
4.2%
National Avg
0.38%
FDIC-insured
Massachusetts Tax on Interest
5.00%
marginal
After-Tax Yield
2.98%
at 24% federal

What $25,000 Earns in Massachusetts

Gross Interest
$1,050.00/yr
at 4.2% APY
Tax Owed
−$304.50
federal + 5.0% state
You Keep
$745.50/yr
~2.98% after-tax
Math assumes 24% federal bracket (~$100k+ household income), 5.00% Massachusetts marginal rate. Lower brackets keep more.
Massachusetts snapshot

What Massachusetts does to your interest — and what a home here costs

Zillow Home Value Index for Massachusetts, August 2026, combined with the Freddie Mac 30-year rate of 7.18% (November 5, 2026), Massachusetts's 1.15% effective property tax rate, and a $1,700/yr average insurance premium.

Median home value
$661,896
+2.3% vs. a year ago · +80% vs. US
State tax on interest
up to 5%
Top marginal rate
4.20% HYSA, after tax
2.98%
24% federal + state
4.38% 1-yr Treasury, after tax
3.33%
State-tax exempt
20% down on a median home
$132,379
What a down-payment fund needs to reach
Largest Massachusetts metros (Zillow median · income needed at 20% down)
Boston, MA · $733,574 · needs $202,700Worcester, MA · $479,429 · needs $134,600Springfield, MA · $376,569 · needs $107,000
Full payment breakdown on a $650,000 Massachusetts home →Compare all 50 states and 100 metros →

How to Pick the Best Savings Account in Massachusetts

Online banks consistently beat brick-and-mortar APYs because they have lower overhead. The top high-yield savings accounts available to Massachusetts residents pay around 4.2% APY — roughly 11× what your local bank pays on its standard savings account. Don't forget: Massachusetts taxes interest as ordinary income at up to 5%, so your real after-tax return is lower than the headline APY.

What to look for

Compare APY (the longer-term benchmark, not promotional rates), monthly fees (avoid them), minimum balance requirements (avoid those too — top HYSAs have $0 minimums), and whether the account is FDIC-insured up to at least $250,000. Some online banks offer extended insurance through sweep accounts.

HYSA vs CD vs Money Market

For Massachusetts residents, HYSAs are the most liquid option — money is accessible within 1-3 business days. CDs lock your money for 3 months to 5 years in exchange for slightly higher rates. Money market accounts blend the two but typically pay slightly less than top HYSAs. For an emergency fund, HYSAs win.

Treasury bills as a state-tax-free alternative

For Massachusetts residents in higher tax brackets, Treasury bills (T-bills) offer a unique advantage: their interest is exempt from Massachusetts state income tax. At 5% state, that's worth roughly 3.0% in extra effective yield vs. an HYSA paying the same headline rate. Worth comparing if you have $10k+ to allocate.

More for Massachusetts savers
Emergency Fund Calculator →Compound Interest →Best HYSAs Guide →HYSA Article →