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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 Delaware

Top APYs around 4.2% for Delaware residents — 11× the national average of 0.38%. Account for Delaware's 6.6% state tax to see your real after-tax yield.

HYSA APY Snapshot — Delaware

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
Delaware Tax on Interest
6.60%
marginal
After-Tax Yield
2.91%
at 24% federal

What $25,000 Earns in Delaware

Gross Interest
$1,050.00/yr
at 4.2% APY
Tax Owed
−$321.30
federal + 6.6% state
You Keep
$728.70/yr
~2.91% after-tax
Math assumes 24% federal bracket (~$100k+ household income), 6.60% Delaware marginal rate. Lower brackets keep more.
Delaware snapshot

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

Zillow Home Value Index for Delaware, August 2026, combined with the Freddie Mac 30-year rate of 7.18% (November 5, 2026), Delaware's 0.53% effective property tax rate, and a $1,200/yr average insurance premium.

Median home value
$406,074
+1.3% vs. a year ago · +10% vs. US
State tax on interest
up to 6.6%
Top marginal rate
4.20% HYSA, after tax
2.91%
24% federal + state
4.38% 1-yr Treasury, after tax
3.33%
State-tax exempt
20% down on a median home
$81,215
What a down-payment fund needs to reach
Full payment breakdown on a $400,000 Delaware home →Compare all 50 states and 100 metros →

How to Pick the Best Savings Account in Delaware

Online banks consistently beat brick-and-mortar APYs because they have lower overhead. The top high-yield savings accounts available to Delaware residents pay around 4.2% APY — roughly 11× what your local bank pays on its standard savings account. Don't forget: Delaware taxes interest as ordinary income at up to 6.6%, 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 Delaware 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 Delaware residents in higher tax brackets, Treasury bills (T-bills) offer a unique advantage: their interest is exempt from Delaware state income tax. At 6.6% state, that's worth roughly 4.0% in extra effective yield vs. an HYSA paying the same headline rate. Worth comparing if you have $10k+ to allocate.

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