HSA state tax: only California and New Jersey
The federal "triple-tax-free" headline is simply wrong for a large share of the population — but for exactly two states, not the "29" some pages claim. Here's what's real for 2026.
What CA and NJ actually do
California and New Jersey are the only two states that tax HSAs in 2026. In both, the treatment is the same in two ways:
- No deduction on contributions. You add your HSA contribution back to state income — so the "money goes in pre-tax" advantage applies federally but not at the state level.
- Annual tax on in-account earnings. Interest, dividends, and capital gains inside the HSA are taxed every year at ordinary rates, with no long-term capital gains break. This is the part that quietly erodes the "grows tax-free" premise.
Qualified distributions still aren't taxed by either state — the "comes out tax-free for medical" leg survives. And New Jersey adds one small offset: it lets HSA-paid medical expenses count toward its medical-expense deduction above a 2%-of-income floor, so ignoring that slightly overstates the NJ cost.
The strongest HSA strategy — max, invest, and let it compound for decades — leans entirely on tax-free growth. In CA and NJ that growth is taxed annually, so a CA or NJ resident should not assume their HSA compounds state-tax-free. Our calculator's projection already applies this drag when you select either state.
Everywhere else conforms — or doesn't tax at all
Two other groups of states need no special handling:
- No-income-tax states. Alaska, Florida, Nevada, South Dakota, Texas, Wyoming — plus Tennessee and New Hampshire — have no state income tax that reaches HSA earnings, so the question is moot.
- Every other income-tax state. These conform automatically, because state taxable income flows from your federal adjusted gross income, which already reflects the HSA deduction. There's no separate add-back and no annual earnings tax.
Two outdated claims to ignore
A lot of stale pages still get this wrong. First, they list Tennessee and New Hampshire as taxing HSA interest and dividends. That's obsolete: Tennessee's Hall tax was repealed (effective 2021) and New Hampshire's Interest & Dividends tax was repealed (effective January 1, 2025) — neither taxes HSA earnings anymore. Second, some tools assumed California would "conform" for 2026; it did not. California's AB 781, the bill that would have allowed the federal deduction, died on January 31, 2026, so California remains non-conforming.
And you may see the claim that "29 states tax HSAs." That number conflates "has no separate state HSA deduction line on the form" with "actually taxes the account." Once you account for conformity through federal AGI, the real count of states that impose a distinct HSA tax is two.
The 2026 HSA Triple-Tax Optimizer lets you pick your state and marginal rate, then nets the CA/NJ earnings tax out of the growth figure and the projection. See also the Medicare 6-month lookback and what the 2026 OBBBA law changed.
Reflects state law as of June 1, 2026. California (AB 781 died Jan 31, 2026) and New Jersey remain the only two states taxing HSAs; TN's Hall tax and NH's Interest & Dividends tax are repealed. State-conformity bills can change each legislative session — a New Hampshire I&D reinstatement proposal (HB 503-FN) has been floated but is not law. Verify with your state tax authority. This guide is educational, not advice; see our disclaimer.
Sources: California FTB 2025 Schedule CA (540) instructions; California AB 781 bill status; New Jersey Division of Taxation income-tax deductions; Newfront, "California and New Jersey HSA state income tax"; IRS Pub 969.