What is the property tax rate in Twin Falls County?

The combined effective property tax rate in Twin Falls County, Idaho is approximately 0.66%.

Twin Falls County Property Tax Calculator (2026)

Property Tax in Twin Falls County, 2026

A calculator and field guide for Twin Falls-area homeowners — and for anyone considering a move to Twin Falls County — including Idaho's 100% assessment ratio, the $125,000 Homestead Exemption (Idaho Code §63-602G — lesser of $125K or 50% of MV), the HB 292 of 2023 Homeowner Property Tax Relief Account (state-funded ~$200-500/yr automatic credit, made permanent at $50M/yr by HB 304 of 2025), the parallel School District Facilities Fund ($50M/yr state payment of eligible school bond debt), the Property Tax Reduction (Circuit Breaker §63-705) for 65+/widowed/disabled with HHI ≤ $39,130 ($250-$1,500 refundable), and the $1,500 Veterans Property Tax Reduction (NOT full — Idaho is NOT a categorical full-vet state).

Twin Falls County operates under Idaho's 100% assessment ratio + $125,000 Homestead Exemption system (Idaho Code §63-602G). Owner-occupied primary residences receive an exemption equal to $125,000 OR 50% of market value, whichever is LESSER, applied as a reduction in taxable value. Twin Falls's combined mill levy is approximately 10.43 mills per $1,000 of taxable value, producing typical homestead effective rates around 0.66%. HB 292 of 2023 adds a state-funded credit (~$200-500 typical) automatically on the December tax bill.

How the bill is built

Idaho is a 100% AR state — the assessor sets market value with no AR reduction. For owner-occupied homesteads, subtract $125,000 OR 50% of MV (whichever is lesser) to get taxable value. A $400K homestead: TV = $275K. A $200K homestead: TV = $100K (50% cap). Tax = TV × combined mill levy / 1000. State credits (HB 292, PTR Circuit Breaker, Veterans Reduction) apply to the bill after calculation. Bills issue in November, half due Dec 20 and half June 20.

HB 292 of 2023 was Idaho's response to the 2020-2022 housing boom. Two state-funded mechanisms apply automatically to homesteads: the Homeowner Property Tax Relief Account (~$200-500 December bill credit) and the School District Facilities Fund (state pays eligible school bond debt). HB 304 of 2025 made both permanent at $100M/year combined.

Idaho is NOT a full-vet-exemption state. The Veterans Property Tax Reduction (Idaho Code §63-701) caps at $1,500/year for 100% P&T or IU disabled vets — no income limit, but the ceiling means high-bill Boise/CDA homestead owners still pay the difference. Stack with the $125K Homestead Exemption + HB 292 credit for compounded benefit.

2026 Twin Falls County rate breakdown (combined mill levy per $1,000 of taxable value (100% AR; FMV − $125K Homestead Exemption); HB 292 Homeowner Tax Relief Credit ~$200-500 applied post-bill, Twin Falls district)

Taxing entity	Rate
Twin Falls County combined mill levy (county + city + school district + highway district + library district + irrigation district); typical Twin Falls residential tax code area, post 100% AR + $125K Homestead Exemption	10.4300
Combined total	10.4300

As of April 27, 2026 · From Twin Falls County Assessor.

Note: Twin Falls County anchors the Magic Valley region — south-central Idaho’s irrigated agricultural heartland. Twin Falls (~52,000) sits on the Snake River Canyon, a 500-foot-deep gorge cut by the Snake River. The Magic Valley earned its name from the dramatic 1900s-1910s transformation of the Snake River Plain from sagebrush desert to highly productive irrigated farmland through massive irrigation projects (notably the Milner Dam, completed 1905). The valley is a major US producer of potatoes (Idaho is #1 US potato state, with most production in the Magic Valley + eastern Idaho), sugar beets, dairy (Idaho is #2 US milk state, behind only California, with Magic Valley producing ~70% of Idaho’s milk), and beans.

Note: Twin Falls County’s 0.66% effective rate matches Bonneville County’s — reflecting Twin Falls’ mill levies around 10.43 per $1,000 of taxable value applied to a $340,000 median homestead with the $125,000 Homestead Exemption. Net taxable value of $215,000 produces typical bills of ~$2,242. Twin Falls saw substantial 2020-2024 home value growth (~70% from 2019) driven primarily by Chobani’s rapid expansion (described below), regional dairy industry growth, and remote-work in-migration from California and the Pacific Northwest.

Note: Chobani — the Greek yogurt company founded in 2005 by Turkish immigrant Hamdi Ulukaya — built its Twin Falls plant in 2012, choosing Twin Falls over competing sites because of the Magic Valley’s massive milk supply (a typical 2 million pounds/day required for the plant). At the time of its 2012 opening, the Twin Falls plant was the largest yogurt manufacturing facility in the world (~1 million square feet, ~1,000 employees by 2020). Chobani’s Twin Falls plant transformed the local economy — single-handedly accounting for ~10% of Twin Falls County’s employment growth 2012-2020. Hamdi Ulukaya (born 1972 in Ilic, Turkey) became one of the most-celebrated immigrant entrepreneurs in the US, taking the company public in 2025 for ~$13B valuation.

Deductions and exemptions for 2026

Idaho homeowner relief operates through four mechanisms: the $125,000 Homestead Exemption (applies automatically to all primary residences), HB 292's Homeowner Tax Relief Credit (state-funded, ~$200-500 automatic), the Property Tax Reduction Program / Circuit Breaker (income-tested, $250-$1,500 for 65+/widowed/disabled), and the Veterans Property Tax Reduction (up to $1,500 for 100% disabled vets, no income limit). Idaho is NOT a full-vet-exemption state — the $1,500 ceiling matters for high-bill homesteads.

Homestead Exemption (Idaho Code §63-602G)

Reduces taxable value by the LESSER of $125,000 OR 50% of market value, for owner-occupied primary residences. Examples: $400K home → $125K exemption (cap), TV = $275K. $200K home → $100K exemption (50% cap), TV = $100K. Apply with County Assessor; the homestead must be owner-occupied as primary dwelling on January 1 (or before April 15 if purchased after; later filings prorate). One-time application — auto-renews unless ownership or residency changes. Raised from $100K to $125K effective Jan 1, 2022 (HB 389 of 2021).

HB 292 of 2023 Homeowner Property Tax Relief Account

State-funded direct credit applied automatically to the December tax bill on all homestead-exempted properties — no application required. Typical reduction $200-500/year. HB 304 of 2025 made the funding permanent at $50M/year, plus another $50M/year to a parallel School District Facilities Fund that pays eligible school bond debt (reducing the school levy portion for all property owners with eligible bonds). The credit was Idaho's response to the 2020-2022 housing boom that drove Treasure Valley and Coeur d'Alene home values up 80-100%.

Property Tax Reduction Program (Circuit Breaker, Idaho Code §63-705)

Refundable credit of $250-$1,500 for homeowners 65+ OR widowed OR disabled OR blind OR former POW/hostage with 2025 income (after medical expenses) ≤ $39,130 for 2026 tax year. Home value cap: market value ≤ 200% of county median assessed value. Apply with County Assessor or Idaho State Tax Commission between Jan 1 and Apr 15; annual application required. New online portal at the Tax Commission since 2024. A separate Property Tax Deferral program (income limit ~$61,674) lets seniors defer with a state lien repaid at sale.

Veterans Property Tax Reduction (Idaho Code §63-701 et seq.)

Up to $1,500 maximum tax credit for veterans with 100% service-connected disability OR 100% individual unemployability rating. NO income limit. Apply by April 15 with County Assessor or Idaho State Tax Commission; submit VA disability rating letter + DD-214. P&T disabled: one-time application, auto-renews. Non-P&T 100% disabled / IU: annual application required. Stacks with Homestead Exemption + HB 292 credit — a 100% disabled vet in Boise can bring a typical ~$3,800 bill down to ~$1,800-2,100.

Appealing your assessment

Assessment notices are mailed in early June. Contact the County Assessor's office immediately to request informal review; if unsatisfied, file formal appeal with the County Board of Equalization no later than the FOURTH MONDAY OF JUNE (Idaho Code §63-501A). The BOE meets July-August. Appeal further to the Idaho Board of Tax Appeals within 30 days, then District Court. Idaho's tight ~3-week appeal window catches many homeowners off guard — assessment notices arrive early June and BOE deadline is fourth Monday of June.

Cities and towns in Twin Falls County

Twin Falls County contains 4 incorporated municipalities, ranging from Twin Falls to the smallest village. Search volume for property tax is often city-specific, so here is the complete list — with population from the 2020 US Census, rounded to the nearest 100.

Data: US Census Bureau, 2020 Decennial Census. Populations rounded. Cities marked as "split" straddle a county border — the portion inside Twin Falls County is subject to Twin Falls County's tax rolls, while the portion outside is subject to the adjacent county's.

City or town	Type	Population (2020)
Twin Falls County seat	city	52,000
Kimberly	city	5,000
Buhl	city	4,500
Filer	city	3,000

About city-level property tax rates: The rate breakdown and calculator on this page reflect the Twin Falls tax district. Other cities in Twin Falls County may pay into different school districts, city rates, and special districts — so their combined rates can differ, sometimes substantially. Always verify the specific rates for your address with the Twin Falls County Assessor before relying on any estimate.

Frequently asked questions

When are Idaho property taxes due?

Bills are issued in November by the county treasurer. Most counties allow split-payment: first half due December 20, second half due June 20. Late payments accrue 1% per month + 2% penalty. Most homeowners pay through escrow. The HB 292 credit applies automatically to the December bill if your homestead exemption is on file with the County Assessor.

How does Idaho's $125,000 Homestead Exemption work?

The exemption (Idaho Code §63-602G) reduces taxable value by the LESSER of $125,000 OR 50% of market value. A $400K home: $125K exempt, TV = $275K. A $200K home: $100K exempt (50% cap), TV = $100K. Apply once with the County Assessor — auto-renews unless ownership or residency changes. Idaho is a 100% AR state, so the exemption directly reduces taxable value (no AR layer).

What is HB 292 of 2023?

HB 292 was Idaho's response to the 2020-2022 housing boom. It created two state-funded mechanisms: a Homeowner Property Tax Relief Account (~$200-500 automatic credit on the December bill for all homestead-exempted properties) and a School District Facilities Fund (state pays eligible school bond debt, reducing the school levy for all owners with eligible bonds). HB 304 of 2025 made both permanent at $100M/year combined. No application required.

How does the Property Tax Reduction (Circuit Breaker) work?

Refundable credit of $250-$1,500 for homeowners 65+ OR widowed OR disabled OR blind OR former POW with 2025 income (after medical expenses) ≤ $39,130 for 2026. Home value cap: market value ≤ 200% of county median assessed value. Apply with County Assessor or Idaho State Tax Commission between Jan 1 and Apr 15; annual application required. Sliding scale by income — lowest-income filers get the full $1,500.

Why isn't Idaho a full-vet-exemption state?

The Veterans Property Tax Reduction (Idaho Code §63-701) is a $1,500 maximum credit, not a full exemption. A 100% disabled veteran in Boise with a typical ~$3,800 bill still owes ~$2,300 after the credit; in lower-bill rural counties (Bingham ~$1,500), the $1,500 credit approximates full exemption. The benefit has NO income limit (unlike the senior PTR Circuit Breaker), and stacks with the $125K Homestead Exemption + HB 292 credit. Apply by April 15.

About Twin Falls County

Beyond the property tax — a few things you might not know about the place.

Weird fact

Shoshone Falls — on the Snake River 5 miles east of downtown Twin Falls — is sometimes called "the Niagara of the West" because at 212 feet it is approximately 45 feet TALLER than Niagara Falls (167 feet at Horseshoe Falls). Shoshone Falls’ width (~900 feet during peak flow) is also larger than Niagara’s American Falls. The falls flow only at full force during spring snowmelt and during high-water release years; for much of the year, Idaho Power’s upstream dams divert most of the Snake River for irrigation and hydroelectric generation, leaving Shoshone Falls reduced to a trickle. The original name comes from the Shoshone Indians, who used the falls as a salmon fishing site for thousands of years before salmon were extirpated by 20th-century dam construction.

Hometown hero

Evel Knievel’s Snake River Canyon Jump

On September 8, 1974, daredevil Evel Knievel (1938-2007, born in Butte, Montana) attempted to jump the Snake River Canyon in Twin Falls in a custom-built steam-powered "Skycycle X-2" rocket. The launch site sits 1.5 miles east of downtown Twin Falls; the Snake River Canyon at the jump site is ~1,580 feet wide and ~500 feet deep. The Skycycle X-2 launched at approximately 350 mph but its drogue parachute deployed prematurely, causing the rocket to drift down into the canyon without crossing — Knievel survived with minor injuries. The jump was sold as a closed-circuit pay-per-view event for $10/ticket (the equivalent of ~$60 in 2024 dollars), drawing ~50,000 attendees on-site and millions of pay-per-view viewers. The original launch site is preserved as a Twin Falls tourist attraction; multiple Knievel-inspired jump attempts have been made there since (including Eddie Braun’s successful 2016 reproduction of the jump using an updated rocket design).

Biggest annual event

Twin Falls County Fair

Held annually for 5 days in late August/early September at the Twin Falls County Fairgrounds in Filer (8 miles west of Twin Falls) since 1908, the Twin Falls County Fair features livestock competitions, a PRCA rodeo, and traditional county fair programming. Twin Falls also hosts the annual Western Days festival (early June, downtown Twin Falls) celebrating the city’s pioneer heritage. The Snake River Canyon attracts substantial year-round tourism — especially for BASE jumping at the Perrine Bridge (the only US bridge where BASE jumping is legal year-round without a permit, drawing ~10,000 jumps annually).

Property Tax in Twin Falls County, 2026