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Crunching costs, sorting signals, rendering insights.
Crunching costs, sorting signals, rendering insights.
No sugarcoating: the 30% rule — spending no more than 30% of gross income on housing — is the most widely cited benchmark for affordability. On a $40K salary, 0 cities (0%) meet this threshold. That's a tough market. We ran the numbers on 3 cities in Idaho using 2026 census, rent, and salary data. N…
#1 Ranked: Nampa — cost index 104, rent $1,561/mo, income $72,122
0 of 3 cities keep rent under 30% of $40K
0 of 3 cities keep rent under 30% of $40K gross income
Data sourced from Census Bureau, Zillow, BLS, and Tax Foundation — current as of 2026
No sugarcoating: the 30% rule — spending no more than 30% of gross income on housing — is the most widely cited benchmark for affordability. On a $40K salary, 0 cities (0%) meet this threshold. That's a tough market. We ran the numbers on 3 cities in Idaho using 2026 census, rent, and salary data. Nampa comes out on top — here's the full ranking and analysis.
The obvious answer isn't always the right one. And roughly speaking, exhibit A: 0 of 3 cities keep rent under 30% of $40K. The 30% rule — spending no more than 30% of gross income on housing — is the most widely cited benchmark for affordability. On a $40K salary, 0 cities (0%) meet this threshold. That's a tough market. There's real money on the table here.
A closer look at Nampa: the cost index of 104 breaks down to a Utilities index of 95 (strongest category) and a Housing index of 109 (weakest). Median rent is $1,561/month — 18% below the national median — while household income sits at $72,122, meaning locals spend about 26% of income on rent. That's within the recommended 30% threshold, though it doesn't leave much room.
On a $40K salary, the key number is $1,000/month — that's 30% of gross, the standard affordability line. And as far as the data shows, nampa ($1,561/mo, 47%), Boise ($1,703/mo, 51%), Meridian ($1,954/mo, 59%) all clear that bar. After federal tax, FICA (7.65%), and state income tax, estimated take-home ranges from $30,094 to $30,094/year across these top picks.
Quietly competitive. The definition of value.
Frankly, the trade-off becomes clearer when you add healthcare into the mix. State context matters: Idaho's 3 cities average a 110 cost index with $1,739/month median rent and $84,039 household income. Pandemic migration boom has reshaped prices. The FAQ section goes deeper on this.
Look, Bottom line: Nampa leads this ranking for clear, data-backed reasons — but the "best" city depends on your priorities. Click into any city below to see the full detail page with 12-month trend charts, profession-specific salary data, and a breakdown of all five cost categories. If you're seriously considering a move, use our salary calculator to model your specific income against these numbers.
The 30% rule — spending no more than 30% of gross income on housing — is the most widely cited benchmark for affordability. On a $40K salary, 0 cities (0%) meet this threshold. That's a tough market.
Rent in #1-ranked Nampa has increased from $1,502 to $1,561/mo over the past 12 months — a 4% increase. Rising costs may erode its top ranking over time.
114,268 residents · Idaho
Dive into Nampa's numbers: cost index 104 — for better or worse — (8 points below national average), rent $1,561/month, income $72,122, and a home price of $408,658. There's not much to say about that beyond the obvious. The city's cost profile isn't flat — Utilities is the cheapest category at 95, while Housing runs 109. With 114,268 residents, it balances mid-size city convenience with manageable costs. Surprising? Maybe. But the data's clear.
235,421 residents · Idaho
A closer look at Boise: the cost index of 110 — and that's before you even look at taxes — breaks down to a Utilities index of 101 (strongest category) and a Housing index of 125 (weakest). Median rent is $1,703/month — 10% below the national median — while household income sits at $81,308, meaning locals spend about 25% of income on rent. That's within the recommended 30% threshold, though it doesn't leave much room.
134,801 residents · Idaho
Here's Meridian by the numbers — and there's a lot to like. Cost index: 115. Rent: $1,954/month — for better or worse — . Income: $98,686/year. Home price: $526,393. Population: 134,801. The strongest category is Utilities at 106; the most expensive is Housing at 138. Translate that rent to annual numbers, and residents are costing renters $708 more per year vs. the national median. That's a number worth sharing with anyone who says affordable cities can't have good jobs.
| City | State Tax | Sales Tax | Property Tax | Est. Take-Home |
|---|---|---|---|---|
1Nampa | 5.695% | 6.02% | 0.56% | $30,094 |
2Boise | 5.695% | 6.02% | 0.56% | $30,094 |
3Meridian | 5.695% | 6.02% | 0.56% | $30,094 |
Nampa ranks #1 in Idaho for this analysis with a cost index of 104 and median income of $72,122.
Yes. On a $40K salary in Nampa, rent would consume about 47% of your gross monthly income. Financial experts recommend keeping rent under 30%. It's tight — consider a roommate or nearby suburb.
Our cost of living index uses real Zillow rent data as the foundation, indexed to 100 (national median). Sub-categories (housing, food, transport, utilities, healthcare) are derived from the overall index with regional adjustments. Data is updated monthly.
Nampa (ranked #1) has a cost index of 104 and rent of $1,561/mo, while Meridian (ranked #3) has a cost index of 115 and rent of $1,954/mo — a 11-point difference in cost of living.
City data is refreshed monthly from Census Bureau population estimates, Zillow rent and home price indices, BLS salary data, and Tax Foundation tax rates. Last updated: 2026.
The median 1-bedroom rent in Nampa is $1,561/month as of 2026, based on Zillow's Observed Rent Index. This is $334 below the national median of $1,895/month.
After federal taxes, FICA (7.65%), and 5.695% state income tax, estimated take-home on $40K in Nampa is approximately $30,094/year ($2,508/month). After median rent of $1,561/month, you'd have roughly $11,362/year for all other expenses.
The median home price in Nampa is $408,658, which is 5.7× the local median income. Most median-income households would stretch to buy at this ratio. The national median home price is $467,370.
Idaho has a 5.695% state income tax rate. Combined state and local sales tax averages 6.02%, and the effective property tax rate is 0.56%.
This ranking was generated using data current as of early 2026. Population and income data comes from the Census Bureau's American Community Survey (5-year estimates). Rent and home price data is from Zillow's monthly releases. Tax rates are from the Tax Foundation's 2025 edition. Rankings are refreshed monthly.