Buy Your Next Idaho Home Before This One Sells
Program and regulatory figures verified September 25, 2026. Details change; confirm your scenario with us.
If you have read that renting out your old house protects your property tax break, that is true one state south. Idaho's statute says the opposite, and the difference shows up in the payment.
Idaho's exemption is not a percentage
Most write-ups call Idaho's homeowner's exemption a 50% break. Read the statute and it is narrower than that. Idaho Code 63-602G(1) exempts the first $125,000 of market value, or 50% of market value, whichever is the lesser.
Those two branches cross at $250,000. Below that, 50% governs. At or above it, the $125,000 cap governs. And the lowest typical home value among Idaho's metros is Pocatello at $353,114, as of August 2026. So for a real Idaho home the exemption is a flat $125,000.
That has a consequence people rarely state. A flat exemption is worth less as a share of value the more the house is worth. The same $125,000 covers 35.4% of a typical Pocatello home and 20.7% of a typical Coeur d'Alene home. Detail on the exemption page.
Renting the old house forfeits it
Idaho Code 63-602G(2)(a) allows the exemption only where the homestead is owner-occupied and used as the primary dwelling place of the owner. Subsection (2)(f) defines primary dwelling place as the single place where an owner has a true, fixed and permanent home. Subsection (4)(c) repeats the occupancy condition for continuing the exemption without reapplying.
Nowhere in the section is there a tenant or rental exception. Move out and put a renter in, and the house stops being owner-occupied, so it stops qualifying.
This matters because the neighbouring state does the reverse. Utah Code 59-2-103(6)(b)(ii) preserves Utah's 45% residential exemption for each residential property that is the primary residence of a tenant, which makes renting the departing home the cheapest Utah structure. Copy that reasoning into Idaho and you get the wrong answer. Full comparison on the owner-occupancy page.
How Idahoans buy first
| Structure | Works best when | What it does to the exemption |
|---|---|---|
| Carry both, recast after | Income supports both payments on its own | Departing home is vacant, so it no longer qualifies as owner-occupied |
| Borrow against current equity | Equity is strong, sale is near | Same. Idaho places no CLTV cap on the lien itself |
| Keep it and rent it | The departing home carries its own payment | Forfeits the exemption under 63-602G(2)(a). No tenant carve-out exists |
In Idaho none of the three preserves the exemption on the departing home, which simplifies the decision: choose on the financing, not the tax. Compare them on the structures page.
The timing rules are unusually strict
Three dates from 63-602G(5) belong in any Idaho move plan. The exemption takes effect as of January 1 of the tax year in which a complete application is submitted and approved. It shall not be prorated, so it is all or nothing for the year rather than split by months of occupancy. And the application is due by the end of the county's normal business hours on the last business day of the year, with approved applications received after the second Monday in July granted as tax cancellations instead.
Add 63-602G(4): you apply once and keep the exemption only while you still occupy the same homestead. A move breaks that, so the new house needs its own application.
Idaho does not cap borrowing against your home
Idaho Code 55-1003 caps the homestead exemption at $175,000, amended in 2020. That figure protects equity from creditors. It is not a cap on voluntary liens, so a second mortgage or equity line on the departing residence is available here, subject to investor guidelines. Texas is the contrast: Article XVI Section 50(a)(6) of its constitution caps all homestead liens at 80% combined loan-to-value and prohibits a subordinate equity line outright.
One county changes the whole plan
Idaho's 2026 one-unit conforming limit is $832,750 in 43 of 44 counties. Teton County is $1,249,125, with a two-unit limit of $1,599,375, because it sits in CBSA 27220 alongside Jackson, Wyoming.
The counterintuitive part: Blaine County, which contains Sun Valley and Ketchum, sits at the baseline. Two Idaho resort counties, $416,375 apart in conforming ceiling. See the jumbo page and the Teton Valley page.
If you do rent it, the lease will not help you qualify
Fannie Mae Selling Guide B3-3.8-05, dated 09/02/2026 under Announcement SEL-2026-08, states that lease agreements are not permitted for any departing residence. Market rent is documented by a full appraisal with market rents, a Form 1007 rent schedule, or market analysis tools with at least three comparable rentals.
The math is gross rent times 75%, less that property's PITIA. A positive result offsets the departing residence's payment and nothing more. Negative goes into your debt-to-income ratio. With under 12 months of property management experience, six months of reserves on the vacated home apply. Mechanics on the Form 1007 page.
Frequently asked questions
Can I buy a home in Idaho before my current one sells?
Yes. Three financing structures exist for it: carry both payments and recast the new loan after the sale, borrow against the equity in your current home, or keep the current home as a rental. Idaho places no constitutional cap on borrowing against your own residence, so all three are available.
How much is Idaho's homeowner's exemption?
Idaho Code 63-602G(1) exempts the first $125,000 of market value, or 50% of market value, whichever is the lesser. Because the two branches cross at $250,000 and every Idaho metro's typical home is worth more than that, the practical answer for most Idaho homes is a flat $125,000.
Is Idaho's exemption a percentage of my home's value?
Only below $250,000 of value. Above that the $125,000 cap governs, so the exemption is flat in dollars and falls as a share of value: 35.4% of a typical Pocatello home at $353,114, 25.3% in Boise City at $493,522, and 20.7% in Coeur d'Alene at $605,220, using August 2026 values.
Does renting out my Idaho home keep the homeowner's exemption?
No. Idaho Code 63-602G(2)(a) grants the exemption only where the homestead is owner-occupied and used as the primary dwelling place of the owner, and the section contains no tenant or rental exception. Renting the departing residence forfeits the exemption.
Why does Utah treat this differently from Idaho?
Because Utah's statute has a carve-out Idaho's does not. Utah Code 59-2-103(6)(b)(ii) preserves that state's 45% residential exemption for each residential property that is the primary residence of a tenant. Idaho Code 63-602G requires owner-occupancy throughout, so the same decision produces opposite tax outcomes on either side of the state line.
Is Idaho's homeowner's exemption prorated if I move mid-year?
No. Idaho Code 63-602G(5) states the exemption shall not be prorated and is in effect as of January 1 of the tax year in which a complete application is submitted and approved. Applications are due by the last business day of the year, and approved applications received after the second Monday in July are granted as tax cancellations.
Do I have to reapply for the exemption when I move within Idaho?
Yes. Idaho Code 63-602G(4) lets an owner apply only once, but only while that owner still occupies the same homestead for which the application was made. A move ends that continuity, so the new home requires its own application.
What is the 2026 conforming loan limit in Idaho?
$832,750 on one unit in 43 of Idaho's 44 counties, including Ada, Kootenai, Bonneville, Canyon, Twin Falls, Bannock and Blaine. Teton County alone is $1,249,125 one-unit and $1,599,375 two-unit, because it shares CBSA 27220 with Jackson, Wyoming.
Mike Certo · NMLS #260555 · Cornerstone First Mortgage NMLS #173855 · Equal Housing Lender. Educational content about financing, not a loan commitment and not legal, tax, or real estate advice. Idaho's homeowner's exemption is administered county by county under Idaho Code 63-602G and 63-703, and eligibility depends on your facts; your county assessor, your CPA or an Idaho attorney, and your real estate agent each handle their own part. Loans are subject to borrower and property qualification.