Bank Gap by State
The Bank Gap in Kansas
Kansas taxes savings interest at a top graduated rate of 5.7%, similar to several of its Midwest neighbors, against a cost of living that stays comfortably below the national average.
Last reviewed August 7, 2026 · SwitchWize Research Desk
Before KS tax
$1,005/yr
on a $25,000 balance
After KS 5.7% tax
$948/yr
recoverable by switching
On a $25,000 balance, the gap is about $1,005 a year before tax. After Kansas's 5.7% top income-tax rate on the additional interest, you keep about $948. Because Treasury interest is exempt from Kansas income tax, routing that cash through a state-tax-exempt Treasury vehicle can recover most of the difference.
Estimated Bank Gap by balance
| Balance | Current earnings | Better-fit earnings | Estimated Bank Gap | After KS tax |
|---|---|---|---|---|
| $5,000 | $19 | $220 | $201 | $190 |
| $10,000 | $38 | $440 | $402 | $379 |
| $25,000 | $95 | $1,100 | $1,005 | $948 |
| $50,000 | $190 | $2,200 | $2,010 | $1,895 |
| $100,000 | $380 | $4,400 | $4,020 | $3,791 |
Estimates over 12 months at 0.38% current APY and 4.40% better-fit APY. The "After KS tax" column applies KS's 5.7% top income-tax rate to the additional interest; federal tax applies on top and is not shown. Example only — your result depends on your balance, rates, and time horizon.
Why Kansas changes the math
Kansas applies a top graduated rate of 5.7% to interest income. Treasury interest is exempt from that tax, giving higher-income Kansas savers a moderate after-tax edge from T-Bills or a government money market fund over a comparably priced taxable account.
Below-average living costs keep typical Kansas emergency-fund targets modest relative to the coasts, though the Bank Gap still applies in full to whatever balance is sitting at a national-average rate.
Cost of living in Kansas is below the national average, which shapes how large an emergency fund needs to be and therefore how many dollars the Bank Gap quietly costs on idle cash.
Because Kansas taxes savings interest but not Treasury interest, the highest after-tax yield is not always the highest headline APY. Run your tax profile through the short-term savings tool to see whether a Treasury bill or government money market fund beats a taxable account for you.
Open the short-term savings toolFrequently asked questions
Does Kansas tax high-yield savings account interest?
Is a high-yield savings account worth it in Kansas?
Are T-Bills better than a HYSA for Kansas savers?
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Calculate my Bank GapEducational information, not tax or financial advice. State tax rules are summarized at a high level and depend on your full situation. Rates are illustrative of current market conditions and should be confirmed with the provider. Confirm tax treatment with a qualified professional.