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US relocation · 2026

Pennsylvania flagPhiladelphia → Idaho flagBoise

At $100,000 gross, you’d need about $96,226 in Boise to match Philadelphia purchasing power — and same-gross take-home shifts by −$2,230/year.

By Sammy S. · Founder · AuthorUpdated for 2026

Stronger purchasing power

Boise leads

City COL moves -4 from Philadelphia (106) to Boise (102). Parent median income delta (Pennsylvania → Idaho): −$2,000. At $100,000 gross: equivalent salary ~$96,226; same-gross take-home −$2,230/year.

Side-by-side city scoreboard

Philadelphia

94

Purchasing power index · 100 = national avg

COL index
106
Parent median income
72,800 USD
Sales tax
~6.34%
Property tax
~1.26%
Income tax
Taxed
$100k take-home
$76,110
Open calculator →

Boise

98

Purchasing power index · 100 = national avg

COL index
102
Parent median income
70,800 USD
Sales tax
~6.03%
Property tax
~0.5%
Income tax
Taxed
$100k take-home
$73,880
Open calculator →
●Example scenario: $100,000 gross (Single filer, 2026)
Illustrative numbers only—same formulas as the calculator. Take-home rows assume you earn the scenario gross while living in each city (local taxes apply). Below the tables, use “Open calculator — personalize results” to enter your salary, filing status, rent or buy, and more—the full tool uses this same city pair.

Salary & estimated take-home (USD)

Annual gross (scenario)

Philadelphia

$100,000

Boise

$100,000

Est. annual take-home

Philadelphia

$76,110

Boise

$73,880

Approx. combined tax + payroll burden

Philadelphia

23.9%

Boise

26.1%

Take-home difference at same gross

$-2,230 / yr in Boise vs Philadelphia

Equivalent gross for same lifestyle (COL-adjusted)

Boise only

$96,226

Change vs scenario gross

Boise only

-3.8%

Est. take-home at equivalent gross

Boise only

$71,425

Burden at equivalent gross

Boise only

25.8%

Snapshot: how to read this move ($100,000 scenario)

  • Monthly take-home at the same gross. At $100,000/year, estimated take-home is about $6,343/mo in Philadelphia vs $6,157/mo in Boise—roughly $186/mo less in Boise before housing ($2,230/yr annualized).

  • Cost of living vs taxes. Our benchmark COL index is 106 for Philadelphia and 102 for Boise (100 = national average). The destination is about -3.8% less expensive than the origin for that basket—then state/province and payroll taxes shift take-home further.

  • Equivalent salary to keep the same lifestyle. To match purchasing power after COL, the model suggests about $96,226/yr gross in Boise (~$8,019/mo), with estimated take-home around $5,952/mo. Versus estimated take-home in Philadelphia at the scenario gross, that is about -6.2% (by design, equivalent gross targets similar real spending power after COL and taxes; exact match varies with rounding).

  • Cash after typical 1BR rent (illustrative). Using average 1-bedroom rent in the housing table, roughly $4,793/mo is left after rent in Philadelphia at the scenario gross vs $4,877/mo in Boise at the same gross. At the equivalent gross in Boise, about $4,672/mo after rent. Typical rent differs by about $270/mo between the two cities in our data.

Figures use the same tax and COL engine as the calculator; your household, deductions, and neighborhood can change outcomes. Use the calculator below for your exact salary and housing choice.

Housing snapshot · average rent · 1-bedroom apartment

Typical monthly rent

Philadelphia

$1,550

Boise

$1,280

Rent as % of scenario gross ($100,000/yr)

Philadelphia

18.6%

Boise

15.4%

Rent as % of equivalent gross (Boise)

Boise only

16.0%

Rent benchmarks are city-level estimates; neighborhoods vary. Mortgage (buy) and other home sizes are available in the full calculator.

Housing: Philadelphia → Boise

Approximate median monthly rents for the primary metros in Philadelphia and Boise. Negative delta means housing is cheaper in Boise. Figures are planning estimates — neighborhoods vary.

1BR rent delta / yr

−$3,240

1BR % of $100k (Philadelphia)

18.6%

$1,550/mo

1BR % of $100k (Boise)

15.4%

$1,280/mo

Property tax (effective)

~1.26% → ~0.5%

Philadelphia → Boise

At COL-equivalent salary in Boise, 1BR rent is about 16% of gross — vs 15.4% if you keep $100,000 gross.

Apartment rent (monthly)

SizePhiladelphiaBoiseDelta / mo
Studio$1,300$1,050−$250
1 bedroom$1,550$1,280−$270
2 bedroom$1,850$1,580−$270
3 bedroom$2,300$1,980−$320

House rent (monthly)

SizePhiladelphiaBoiseDelta / mo
2 bedroom$2,000$1,680−$320
3 bedroom$2,500$2,100−$400
4 bedroom$3,100$2,650−$450

Buy instead? Est. mortgage (3BR house)

Philadelphia payment

$2,874/mo

Boise payment

$2,414/mo

Payment delta

−$460

Est. purchase price

$540,000 → $453,600

Illustrative P&I only: 20% down, 7% APR, 30-year fixed. Price ≈ annual rent × 18 (price-to-rent). Taxes, insurance, and HOA not included — open the calculator Housing section to adjust.

Sources: approximate metro medians (Zillow / Zumper-style US benchmarks; CMHC-style for Canada). Property tax rates are statewide effective averages. Personalize unit size, rent vs buy, and down payment in the relocation calculator.

Model housing for Philadelphia → Boise

Key takeaways — Philadelphia → Boise

  • Boise has a city cost-of-living index of 102 vs 106 in Philadelphia (national average = 100) — about 4% cheaper on our index.
  • At $100,000 gross (Single filer), roughly $96,226 in Boise matches Philadelphia purchasing power (-3.8% COL-adjusted).
  • Keeping the same $100,000 gross, estimated take-home shifts by about −$2,230/year (Philadelphia → Boise) after federal, state, and FICA taxes.
  • Parent-state paycheck model at $100k (single): Pennsylvania ~$76,110 vs Idaho ~$73,880 (−$2,230/year) — city COL can still change the equivalent salary you need.
  • Illustrative 1-bedroom rent: ~$1,550/mo in Philadelphia vs ~$1,280/mo in Boise (−$3,240/year).
  • Quality-of-life snapshot (indicative): overall 50 in Philadelphia vs 63 in Boise — higher safety in the new city.

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Estimates for planning only. Cost-of-living indices and tax rules change; verify with local sources or a professional before relocating.