Tax Benefits of Buying in Chicago, IL
Buying a home in Chicago, IL comes with meaningful federal income tax advantages. Based on this scenario — a $325,000 home with a $260,000 loan — a single filer can expect approximately $2,521 in Year 1 income tax savings from homeownership. This figure reflects both the federal mortgage interest deduction and, where applicable, the state-level benefit.
Federal Mortgage Interest Deduction
The IRS allows homeowners to deduct mortgage interest on up to $750,000 of qualified loan debt from federal taxable income — one of the largest tax advantages available to homeowners. To benefit, your total itemized deductions (mortgage interest + property taxes, up to the SALT cap, plus any other eligible deductions) must exceed the $16,100 standard deduction for a single filer in 2026.
This loan ($260,000) is under the $750,000 federal cap, so the full interest amount is eligible for the federal deduction.
Year 1 mortgage interest on this loan is approximately $16,814. That figure shrinks every year as your principal balance decreases.
Illinois State Tax Treatment
Unfortunately, Illinois does not allow the mortgage interest deduction on state income taxes. Illinois does not allow homeowners to deduct mortgage interest from state income taxes, limiting the tax benefit to the federal level only. This means homeowners in Illinois can only capture the federal benefit — the state portion of their tax liability is unaffected by the deduction.
How Your Tax Benefit Evolves Over Time
Mortgage interest is front-loaded. Early payments are mostly interest; as the balance declines, each payment shifts toward principal and the deductible amount shrinks. Here's how interest — and the associated potential deduction value — changes for this loan:
| Year | Approx. Annual Interest | Est. Deduction Value |
|---|---|---|
| Year 1 | $16,814 | ~$45 |
| Year 10 | $14,666 | ~$40 |
| Year 20 | $10,055 | ~$27 |
Est. deduction value uses the combined marginal rate (federal + state) applied to the deductible interest. Actual benefit depends on whether itemized deductions exceed the standard deduction in that year.
SALT cap note: The State and Local Tax (SALT) deduction — which covers state income taxes and property taxes combined — is capped at $40,000 through 2029 for most filers, then reverts to $10,000. High-income filers in high-tax states may be partially limited by this cap regardless of their mortgage interest.
This section is for informational purposes only and does not constitute tax advice. Tax outcomes depend on your full financial picture. Consult a qualified tax professional.