Taxes in Mountain Brook
Alabama's near-flat 5% income tax and Mountain Brook's recently-increased 9% combined sales tax apply to residents, layered with a property tax rate that runs above the already-highest-in-Alabama Jefferson County average.
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Learn moreAlabama's graduated income tax -- restated as place-level context
Alabama applies a graduated state income tax: 2%/4%/5%, with the top 5% rate starting at just $3,000 taxable income (single) / $6,000 (MFJ) -- effectively near-flat for most earners. Alabama's real, uncapped federal-income-tax-deduction provision (one of only three states offering it) applies identically here, likely delivering a larger absolute dollar benefit given Mountain Brook's genuinely high household incomes.
Mountain Brook's 9% combined sales tax, recently increased
Mountain Brook's combined sales tax is 9% in 2026; the city's own local Sales and Use tax rate rose from 3% to 4%, effective April 1, 2026 -- a real, recent, and disclosed increase confirmed directly against the city's own official announcement.
Property tax runs above the Jefferson County average
On a $1 million home, expect $6,000-$10,000 in annual property tax -- above Jefferson County's own ~0.596% average rate (itself the highest of Alabama's 67 counties, per this project's companion Birmingham record), reflecting Mountain Brook's additional local millage. Even at the high end of this range, the effective rate remains below the national median.
No state estate or inheritance tax
Alabama levies no state estate tax or inheritance tax. Confirm current guidance directly for any actual estate-planning decision, since sufficiently large estates may still owe the federal estate tax -- a genuinely more relevant consideration for Mountain Brook's high-net-worth residents than for many other Alabama markets in this dataset.
Key takeaways
- Alabama's graduated income tax runs near-flat 5% for most earners; the federal-deduction offset likely delivers a larger absolute benefit given Mountain Brook's high incomes.
- Mountain Brook's combined sales tax rose to 9% as of April 1, 2026.
- Property tax on a $1M home ($6,000-$10,000/year) runs above Jefferson County's already-highest-in-Alabama average.
- Alabama levies no state estate or inheritance tax, though the federal estate tax is a genuinely more relevant consideration for high-net-worth residents here.
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