Crypto taxes in Illinois (2026): federal + state basics
Illinois keeps it flat and simple: one 4.95% rate on nearly everything, including crypto gains of either holding period, on a return that starts from federal AGI.
Who has to file in Illinois
Illinois residents file Form IL-1040 if they must file a federal return (or owe Illinois tax) and are taxed on worldwide income, crypto included. Nonresidents and part-year residents file IL-1040 with Schedule NR to allocate income; crypto gains of a nonresident are intangible income generally sourced to their state of residence, but Illinois wages or business activity can still require the filing. Illinois notably exempts retirement income — pensions, Social Security, IRA distributions — but crypto gains are not retirement income and get no such shelter.
The federal layer comes first
Every state discussion starts with the federal return, because the IRS decides what counts as a taxable event in the first place. Selling crypto for dollars, trading one coin for another, or spending crypto is a disposition: you compute gain or loss as proceeds minus cost basis, and the one-year holding line separates short-term from long-term results. Staking and mining rewards are ordinary income at fair market value when you gain dominion and control over them. Federal reporting runs through Form 8949 and Schedule D, summarized in our how-to-report guide, and the rate tables live in the 2026 capital gains guide. Illinois builds directly on it: the IL-1040's first income line is your federal AGI.
How Illinois taxes crypto
Illinois runs one of the simplest state systems in this guide. The income tax is a constitutionally flat 4.95% on Illinois net income, with no separate capital gains schedule and no distinction between short-term and long-term results. If it is in your federal AGI, it is generally in your Illinois base, taxed at the same 4.95%.
The return starts from federal adjusted gross income (IL-1040, Step 2), then applies Illinois additions and subtractions on Schedule M — things like adding back certain federally exempt interest or subtracting federally taxed Social Security and retirement income. A routine crypto gain needs no Schedule M entry at all: it is already inside federal AGI and simply stays there. The personal exemption allowance ($2,850 per person for 2025, per the IL-1040 instructions) reduces the base before the flat rate applies.
There is no Chicago or Cook County income tax layered on top. For a crypto holder, Illinois is a one-line story: compute the federal gain correctly, multiply by 4.95%.
2026 Illinois rates at a glance
| Income type | Illinois treatment |
|---|---|
| Short-term capital gains | 4.95% flat |
| Long-term capital gains | 4.95% flat (no preference) |
| Staking, mining, airdrops | 4.95% flat |
| Brackets | None — single flat rate; personal exemption allowance applies ($2,850 per person for 2025) |
Illinois individual income tax rate per the Form IL-1040 instructions (Illinois Department of Revenue). The rate is set in statute and unchanged for 2026.
Where crypto lands on the Illinois return
File Form IL-1040. Federal adjusted gross income is entered at Step 2, line 1 — your crypto gains are already inside it. Illinois additions and subtractions are itemized on Schedule M (lines 3 and 7 of the IL-1040); the flat 4.95% is applied to net income at Step 5. File free through MyTax Illinois or any approved software; attach your federal return where the instructions require it.
Illinois-specific gotchas
- No benefit to holding long-term at the state level. The one-year line changes your federal bill only; Illinois takes 4.95% either way.
- Retirement income is exempt — crypto gains are not. Illinois's famous exemption covers pensions, Social Security, and retirement-plan distributions. Gains from a brokerage or exchange account, however large, are fully taxed.
- Losses follow the federal computation. Because Illinois starts from federal AGI, the federal $3,000 capital-loss limitation is already baked into the number Illinois taxes — there is no separate state loss claim.
- Credits for taxes paid elsewhere. If another state taxes the same income (for example during a move year), Schedule CR can credit it against Illinois tax — a reason to keep the other state's return in the same file.
What to do: Illinois checklist
- Pull your records together. Export every exchange and wallet history and save any Form 1099-DA you received — brokers report proceeds for 2025 sales, and the basis box may be blank or wrong.
- Reconcile before you compute. Run each 1099-DA through the free 1099-DA reconciler so the proceeds on the form match your own basis records before anything reaches a return.
- Finish the federal numbers first. Use the crypto tax calculator and the 2026 capital gains guide to get your short-term and long-term totals — {state} starts from them.
- Carry federal AGI onto Form IL-1040. Check Schedule M for any Illinois-only adjustments, then the flat 4.95% applies — no separate crypto schedule exists.
- Check estimates and deadlines. A large one-off gain can require estimated payments during the year, not just a balance due in April — see the estimated taxes guide.
- Keep the file. Transaction records, wallet addresses, and basis elections should be kept for years after filing; our record-keeping guide lists what to save.
Frequently asked questions
Sources & verification
- Illinois Department of Revenue — Form IL-1040 instructions
- IRS Topic 409 — Capital Gains and Losses
- CryptoTaxAI — Form 1099-DA basis reporting 2026
Rates verified November 2026 against the Illinois Department of Revenue (tax.illinois.gov); check the current figures again before filing, because states adjust brackets and forms between seasons.
Keep learning
- Crypto taxes by state — compare all 12 state guides.
- Crypto Capital Gains Tax Rates 2026 — the federal short-term vs long-term tables.
- Free Crypto Tax Calculator — estimate your gain before the state layer.