Residency Migration Reference
Moving from Pennsylvania to Idaho: Residency, Taxes, and What to Prove
Pennsylvania's 3.07% top income tax rate becomes 5.30% in Idaho. This move trades a lighter tax environment for a heavier one, so timing income around the transition year matters.
Residency Tests Side by Side
Pennsylvania uses a 183-day statutory residency threshold, while Idaho uses 270 days. Track both thresholds separately during a transition year rather than assuming they line up.
| Factor | Pennsylvania | Idaho |
|---|---|---|
| Statutory Residency Test | A person domiciled outside Pennsylvania becomes a Pennsylvania statutory resident, taxed the same as a domiciliary, if they maintain a permanent place of abode in Pennsylvania and spend more than 183 days in the state during the tax year. This runs independently of, and in addition to, the domicile test. | Idaho Code §63-3013 defines a resident as an individual either domiciled in Idaho for the entire taxable year, or someone who maintains a place of abode in Idaho for the entire taxable year and spends in the aggregate more than 270 days of the taxable year in Idaho, a materially higher threshold than the 183-day test most states use. Presence within the state for any part of a calendar day counts as a full day toward that 270-day total. |
| Domicile Test | Pennsylvania residents are taxed on all income, Pennsylvania-source and otherwise, based on domicile: the place a person regards as home and intends to return to. The Department of Revenue's guidance lists the practical factors it weighs, where the person spends most of their time, where they maintain bank accounts, where they own real estate, where they hold professional licenses, where they vote, and where they hold a driver's license and register vehicles, the same multi-factor evidentiary approach used in New York and other statutory-resident states. | Idaho defines domicile administratively (IDAPA 35.01.01.030 and the Tax Commission's public guidance) as the place that is the center of an individual's personal and business life, the permanent home a person intends to return to whenever absent. An individual can have multiple residences but only one domicile at a time, and once established, domicile persists until it is affirmatively abandoned, a new one is acquired, and the person is actually living in the new domicile. Evidence weighed includes where the family lives, comparison of homes in different states, where business activity occurs, how time is actually spent during the year, where sentimentally important belongings are kept, and whether the person has given up an Idaho driver's license or the Idaho homeowner's exemption. |
| Day Count Threshold | 183 days | 270 days |
| Any Part of a Day Rule | Not explicitly detailed as any-part-of-a-day in the Department's published guidance reviewed for this research; the statutory test is framed as spending more than 183 days in Pennsylvania while maintaining a permanent place of abode, so the safe planning assumption is that any day of Pennsylvania presence, however brief, counts toward the total. | Yes. Idaho Code §63-3013(1)(b) explicitly states that presence within the state for any part of a calendar day counts as a full day toward the 270-day aggregate threshold, the strict any-part-of-a-day standard. |
| Presumptions | None published | None published as a separate presumption distinct from the domicile-plus-270-day statutory test; Idaho instead runs its 445-day absence safe harbor (below) as the primary mechanism for domiciled Idahoans to be treated as nonresidents. |
| Safe Harbors | Non-permanent abode carve-out | 445-day absence exception |
Leaving Pennsylvania
Philadelphia's collar counties (Montgomery, Bucks, Chester, Delaware) and the Pittsburgh suburbs are the areas practitioners most associate with Pennsylvania domicile disputes, typically retirees or high earners who move to Florida or another no-income-tax state but keep a Pennsylvania home, spend significant time there, and maintain local professional or business ties. Pennsylvania is not consistently named alongside New York, California, New Jersey, Connecticut, Maryland, and Minnesota as one of the most aggressive dedicated exit-audit states in the practitioner and community sources reviewed for this research, but the statutory-resident 183-day-plus-abode test gives the Department a straightforward mechanism to challenge a departure if the taxpayer keeps a maintainable Pennsylvania residence and spends too much time in it.
Trailing Income
Pennsylvania taxes Pennsylvania-source income earned by a nonresident after departure under its standard sourcing framework, wages for work performed in Pennsylvania, income from a Pennsylvania business, and Pennsylvania real property income; no Pennsylvania-specific deferred-compensation clawback statute distinct from ordinary multistate sourcing was located in this research pass. Separately, local EIT obligations can continue to apply based on where work is actually performed even after a person's state domicile has changed.
Part-Year Filing
Part-year residents file Form PA-40, the same form used by full-year residents and nonresidents, using the residency status and apportionment schedules to report worldwide income for the Pennsylvania-resident portion of the year and only Pennsylvania-source income for the nonresident portion.
Enforcement Methods
Common Exit Mistakes
Establishing Idaho Residency
| Action | Agency | Deadline |
|---|---|---|
| Get an Idaho driver's license | Idaho Transportation Department | within 90 days of becoming an Idaho resident |
| Title and register vehicles in Idaho | Idaho Transportation Department / county assessor's motor vehicle office | within 90 days of moving to Idaho |
| Register to vote | Idaho Secretary of State / county clerk | 11 days before an election for mail or online registration; same-day registration is available at early voting locations and on Election Day with proof of residency |
Declaration of Domicile
Idaho has no formal declaration-of-domicile filing comparable to Florida's. The Tax Commission's own guidance points to concrete, checkable evidence instead: where your family lives, where you do business, how you actually spend your time during the year, where sentimentally important belongings are kept, and whether you've obtained an Idaho driver's license or filed for the Idaho Homeowner's Exemption.
Homestead
Idaho's Homeowner's Exemption (Idaho Code §63-602G) exempts 50% of a primary residence's assessed value, capped at $125,000, from property tax, but requires an affirmative application with the county assessor rather than applying automatically. It lasts only until ownership changes or the home stops being used as the owner's primary residence, so a person who moves out but forgets to cancel the exemption leaves an easy paper trail contradicting a claimed departure.
Voter Registration
Mail and online registration must be received 11 days before an election; Idaho also permits same-day registration in person at early voting locations and on Election Day with proof of residency. https://voteidaho.gov/voter-registration/
Vehicle Registration Deadline
90 days
New Resident Tax Traps
Idaho taxes worldwide income from the date Idaho domicile begins, requiring the Form 43 part-year apportionment for the year of the move. Because Idaho and Washington are both community property states, a couple where one spouse lives and works in Idaho and the other in Washington must generally report one-half of all community income, including the out-of-state spouse's earnings, on the Idaho return, a wrinkle that surprises newly arrived couples who assume only Idaho-source income is reportable.
What Changes on Tax
Pennsylvania Top Rate
3.07%
Idaho Top Rate
5.30%
Moving from Pennsylvania to Idaho raises the top marginal income tax rate from about 3.07% to about 5.3%, an increase of roughly 2.23 percentage points.
Withholding Reciprocity
Pennsylvania and Idaho do not have a wage-withholding reciprocity agreement with each other, so this move follows ordinary source-state and resident-state filing rules rather than a reciprocity exception.
Community Property Transition
Pennsylvania uses common law marital property rules and Idaho is a community property state. Property acquired during marriage after the move may be characterized differently going forward, which matters for estate planning and for basis step-up on a spouse's death.
Beyond Income Tax
Pennsylvania
Capital gains: Capital gains are one of Pennsylvania's eight enumerated income classes and are taxed at the same flat 3.07% rate as wages; there is no separate lower rate or holding-period distinction the way the federal system has.
Estate or inheritance tax: Pennsylvania has no estate tax but does impose an inheritance tax on the transfer of a decedent's property, based on the beneficiary's relationship to the decedent: 0% to a surviving spouse or to a parent inheriting from a child 21 or younger, 4.5% to direct descendants and other lineal heirs, 12% to siblings, and 15% to all other heirs. The tax is due at death and becomes delinquent nine months later, with a 5% discount for payment within three months.
Property tax: Effective property tax rate on owner-occupied housing runs about 1.26%, on the higher side nationally, reflecting Pennsylvania's heavy reliance on local property taxes to fund school districts. Homeowners can apply for the statewide Homestead/Farmstead Exclusion under Act 1 of 2006, which reduces school property tax using gaming revenue, and Philadelphia separately runs its own Homestead Exemption reducing the taxable assessed value of an owner-occupied primary residence; this research pass could not confirm the current dollar amount of Philadelphia's exemption from a primary city source.
Sales tax: 6% state sales tax rate, with Philadelphia and Allegheny County adding local surcharges that push the average combined state-and-local rate to about 6.34%.
Idaho
Capital gains: Taxed as ordinary income at the flat rate, but Idaho allows a deduction of 60% of the net capital gain from the sale of qualifying Idaho property under Idaho Code §63-3022H. Qualifying property generally means Idaho real property held at least 12 months (18 months if sold before January 1, 2005), or certain business assets, cattle, and horses held for the required period; the deduction is claimed on Form CG and does not apply to gains on out-of-state property or most financial assets.
Estate or inheritance tax: None. Idaho has no estate tax and no inheritance tax.
Property tax: Effective rate is roughly 0.50% of value. Idaho's Homeowner's Exemption exempts 50% of a primary residence's assessed value up to a $125,000 cap (Idaho Code §63-602G), but unlike an automatic homestead protection this requires an affirmative application with the county assessor and lasts only until ownership changes or the home stops being the owner's primary residence, making it an easy domicile cross-check point.
Sales tax: 6.00% state rate, with a low average combined state-and-local rate of about 6.03%, since Idaho has very limited local-option sales taxes (mostly a handful of resort cities).
Who This Move Applies To
Travel Nurses
In Pennsylvania
Philadelphia and Pittsburgh's major hospital systems are large travel-nursing markets, and a nurse working Pennsylvania contracts needs to watch the statutory residency test: crossing 183 days of Pennsylvania presence while maintaining anything that qualifies as a permanent (not purely temporary) place of abode, an apartment lease rather than short-term corporate housing, for example, can pull the nurse into Pennsylvania statutory residency regardless of a claimed tax home elsewhere.
In Idaho
Boise's hospital systems and Idaho's rural-hospital travel contracts make the state a modest but real travel-nurse market. A nurse genuinely domiciled in Idaho who takes Idaho contracts is simply taxed as a resident. A nurse claiming an Idaho tax home while working elsewhere needs a real, regularly used, duplicated-expense Idaho residence; claiming Idaho as a federal away-from-home tax home while also trying to use the 445-day absence exception for Idaho state tax purposes is explicitly disqualifying under Idaho's own rule, so the two claims cannot be made consistently.
Professional Athletes
In Pennsylvania
Philadelphia is home to the Eagles (NFL), Phillies (MLB), 76ers (NBA), and Flyers (NHL), making it one of the country's most active jock-tax markets; visiting players owe Pennsylvania nonresident tax apportioned by duty days spent in the state for games, practices, and team activities under the standard multistate duty-day framework, while Pennsylvania-based players are taxed on their full income at the flat 3.07% state rate plus any applicable Philadelphia wage tax, with credits for tax paid to other states on away-game income.
In Idaho
Idaho has no major professional sports franchise in the four big US leagues, so jock-tax exposure runs almost entirely one direction: Idaho-domiciled or Idaho-resident athletes are taxed on income earned while playing in other states under those states' own apportionment rules, and nonresident athletes visiting Idaho for occasional events owe Idaho tax on Idaho-source duty days under the state's standard nonresident income sourcing.
Snowbirds, Long Visitors, and RVers
In Pennsylvania
A Pennsylvania domiciliary who winters in Florida or another warm-weather state but keeps the Pennsylvania home in maintainable condition and returns for more than half the year remains a Pennsylvania resident on domicile grounds alone; the more contested scenario is the reverse, someone who has genuinely moved their domicile out of Pennsylvania but keeps a Pennsylvania house available and visits often enough to cross 183 days, which can trigger Pennsylvania statutory residency even after a real domicile change, unless the retained property qualifies as non-permanent lodging (which a fully maintained house generally does not).
In Idaho
Idaho's 270-day statutory threshold is unusually generous compared to the 183-day standard most states use, but it comes paired with the strict any-part-of-a-day counting rule, so a snowbird or long-term visitor who owns or leases an Idaho home needs to track every day with any Idaho presence, not just overnight stays, against that 270-day ceiling. Idaho's own seasonal-worker example (a couple splitting time between an Alaska fishing operation and an Idaho off-season home) shows the state applies the ordinary domicile-or-270-day test to seasonal residents just as it would to anyone else, with no special seasonal carve-out.
Remote Workers
In Pennsylvania
Pennsylvania has no convenience-of-the-employer rule of its own; a remote worker physically performing work from Pennsylvania for an out-of-state employer generally owes Pennsylvania tax on that Pennsylvania-source income based on physical presence, and does not separately owe the employer's home state tax on those same wages unless that state applies its own convenience rule, which is the scenario Pennsylvania arrivals from convenience-rule states like New York need to watch in their employer's withholding treatment. Pennsylvania also has long-documented reciprocal wage-tax agreements with several neighboring states (commonly cited as Indiana, Maryland, New Jersey, Ohio, Virginia, and West Virginia), under which a resident of one state working in the other pays tax only to their state of residence rather than both; this research pass could not obtain a fresh confirmation directly from the Department of Revenue's site this session, so verify current reciprocal-state status before relying on it for a specific filing.
In Idaho
Idaho has no convenience-of-employer rule: a nonresident performing all work physically outside Idaho for an Idaho-based employer is not Idaho-taxed on those wages. Idaho, particularly the Boise metro area, has drawn a steady stream of remote workers relocating from higher-cost West Coast states since 2020; because Idaho and Washington are both community property states, a remote-working couple split between the two needs to account for the community-property income-sharing rule on their Idaho return, not just source-based sourcing.
Military
In Pennsylvania
Pennsylvania follows the federal Servicemembers Civil Relief Act and Military Spouses Residency Relief Act: a servicemember stationed in Pennsylvania on orders does not become a Pennsylvania domiciliary solely because of the posting, and an MSRRA-eligible spouse can generally retain the servicemember's state of legal residence for tax purposes.
In Idaho
Idaho follows the federal Servicemembers Civil Relief Act and Military Spouses Residency Relief Act, and Idaho's own guidance walks through the distinction between military home of record and state of legal residence/domicile: a service member stationed in Idaho under orders (for example, at Mountain Home Air Force Base) is taxed based on domicile, not the posting, active-duty military pay is not Idaho-taxed for nonresident service members, and a nonmilitary spouse can independently be a resident, part-year resident, or nonresident depending on their own domicile and MSRRA elections.
Airline Crew
In Pennsylvania
Philadelphia International Airport is a major American Airlines hub with a substantial resident crew population; federal law (49 U.S.C. § 40116) limits state taxation of air carrier employees to their state of residence and, in narrow cases, a state where more than 50% of pay is earned, so Pennsylvania-domiciled crew are taxed on their full wages at the flat 3.07% rate regardless of how flight time is distributed across other states.
In Idaho
Boise Airport is not a major airline crew base, so Idaho's most relevant federal transportation carve-out runs to interstate rail and motor carrier employees rather than airline crew specifically: Idaho's guidance confirms that employees of interstate rail or motor carriers with regularly assigned duties in more than one state are, under federal law, taxable only in their state of residence, with the Idaho-earned portion of a nonresident's income remaining Idaho-taxable.
Tools for This Move
Pennsylvania to Idaho FAQ
I moved out of Pennsylvania but still own my old house and visit a lot. Am I still a Pennsylvania resident?+
You could be, even with a genuine domicile change, if you spend more than 183 days a year in Pennsylvania and the property qualifies as a permanent place of abode, meaning it can be maintained as a household indefinitely, not a dorm room or short-term corporate housing. That combination triggers Pennsylvania's statutory residency test independent of your stated domicile, so if you're keeping the house in livable condition, watch your day count closely.
Does Idaho use the 183-day rule?+
No. Idaho's statutory residency threshold is 270 days, not 183, and any part of a calendar day with Idaho presence counts as a full day toward that total under Idaho Code §63-3013(1)(b). You're a statutory resident if you maintain a place of abode in Idaho for the entire year and hit that 270-day aggregate, independent of domicile.
Does Pennsylvania tax my Social Security or pension?+
No. Social Security is fully exempt, and pension income is fully exempt once you've reached the plan's retirement age, generally treated as 59 1/2 or older for most retirees. 401(k) and IRA distributions are also fully exempt at that point, which makes Pennsylvania one of the more retiree-friendly states on income tax specifically, even though its property and inheritance taxes are less generous.
I'm domiciled in Idaho but working out of state for years. Am I still an Idaho resident?+
Not necessarily, if you qualify for Idaho's 445-day absence exception: being out of Idaho for at least 445 days within a 15-month period lets a domiciled Idahoan be treated as a nonresident. But the exception doesn't apply if your spouse or minor children keep living in your Idaho home more than 60 days a year, or if you claim Idaho as your federal tax home for away-from-home expenses.
What is this local Earned Income Tax I keep seeing, separate from the state tax?+
Pennsylvania layers a local Earned Income Tax on top of the flat 3.07% state rate, collected through county Tax Collection Districts under Act 32. Your municipality and school district both levy a share, at rates that vary by location, and your employer withholds it based on where you live and work. It's a real, separate bill, not a replacement for the state tax, and new residents often underbudget for it.
How many months can I spend in Idaho as a snowbird before I owe Idaho income tax?+
Up to 270 days in the aggregate during the year, since Idaho's statutory residency test kicks in above that threshold for anyone maintaining an Idaho place of abode. But Idaho counts any part of a day as a full day, so short visits add up faster than in states with a majority-of-day rule.
Does Pennsylvania have an estate tax?+
No estate tax, but Pennsylvania does have an inheritance tax based on your relationship to the deceased: 0% for a surviving spouse, 4.5% for children and other direct descendants, 12% for siblings, and 15% for everyone else. It's due within nine months of death, with a 5% discount if paid within the first three months.
What form do I file if I only lived in Idaho part of the year?+
Form 43, the Idaho Part-Year Resident & Nonresident Income Tax Return. If you and your spouse have different residency statuses and file a joint federal return, you must also file a joint Idaho Form 43, with each spouse's status listed separately.
What form do I file for the year I move to or from Pennsylvania?+
Form PA-40, the same return used by full-year residents and nonresidents, marked with your part-year residency status and using the state's apportionment schedules to allocate income between the resident and nonresident portions of the year.
Does Idaho tax Social Security?+
No. Idaho fully exempts Social Security benefits from state income tax. Other retirement income like pensions, 401(k), and IRA withdrawals is generally taxed at the flat 5.30% rate, though a separate Retirement Benefits Deduction covers qualifying public-system pensions for taxpayers 65 and older or 62 and disabled.
I'm a travel nurse on back-to-back Pennsylvania contracts. Could I become a Pennsylvania resident by accident?+
Yes, if you cross 183 days of Pennsylvania presence in a tax year and your housing there qualifies as a permanent place of abode, meaning an apartment lease rather than short-term corporate or hospital-provided housing, you can be classified as a statutory resident regardless of your claimed tax home in another state. Track your Pennsylvania day count across consecutive contracts, and pay attention to what kind of housing you're in.
Does Idaho have a capital gains tax break?+
Idaho taxes capital gains as ordinary income but allows a 60% deduction on net gains from qualifying Idaho property, generally real property held at least 12 months, claimed on Form CG. The deduction is specific to Idaho property; gains on out-of-state real estate or most stocks and financial assets don't qualify.
Considering the reverse move?
Idaho to Pennsylvania
Moving the other direction is a different fact pattern, not a mirror image: exit risk and establishment mechanics both flip.
View the Idaho to Pennsylvania guideAlso Consider, Leaving Pennsylvania
Pennsylvania to Idaho Reading
Reviewed Against 22 Primary Sources
ResidencyIQ organizes public residency research into a reviewable reference. It does not provide legal or tax advice. Consult a qualified professional before making a residency decision.
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