Is Seattle, WA cheaper than Thornton, CO?

Based on cost of living data, Seattle, WA is 62.0% more expensive than Thornton, CO. This translates to spending an extra $4649 per month.

What salary do I need in Seattle, WA to live like I do in Thornton, CO?

If you earn $150,000 in Thornton, CO, you'd need approximately $205,782.188 in Seattle, WA to maintain the same standard of living.

How does housing cost compare between Thornton, CO and Seattle, WA?

Housing in Seattle, WA is 167.0% more expensive than in Thornton, CO. For a two-bedroom apartment, rent is $2,630/month in Seattle, WA compared to $1,748/month in Thornton, CO.

How much can I save per month by moving from Thornton, CO to Seattle, WA?

Living in Seattle, WA costs approximately $4649 more per month than Thornton, CO, or $55782 more per year, based on a $150,000 salary.

Thornton, CO vs Seattle, WA: Cost of Living Comparison 2026

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Cost of Living Comparison 2026

Data: HUD rent estimates, BLS cost of living

Current salary in Thornton, CO

Numbers update automatically as you type

You'd spend $4.6K/month more in Seattle, WA

$150.0K in your current city equals $205.8K in Seattle, WA

Rent data from HUD ZIP-level estimates · COL index from Denver-Aurora-Lakewood, CO area

Overall Cost

↑ 62.0%

More expensive

Monthly Impact

$4,649

Extra cost

Annual Impact

$55.8K

Per year

Based on monthly living costs (rent, groceries, utilities, transport, healthcare). Home purchase prices shown separately below.

Thornton, CO

Population:145K

Cost Index:

100

100 = national average

Median Home:$417K

Seattle, WA

Population:749K

Cost Index:

162

(62% above avg)

Median Home:$808K

Thornton, CO

The Centennial State

145K

Population

State Tax

Yes

Located in Colorado, this city has a population of 145K residents.

Seattle, WA

The Evergreen State

749K

Population

State Tax

No Income Tax

Climate

Oceanic

Notable Facts

•Coffee culture birthplace
•Major tech center
•Pacific Northwest gateway

Major Industries

TechnologyAerospaceMaritime TradeCoffee Industry

Cost Breakdown by Category

Annual spending: Thornton, CO vs Seattle, WA

Category	Thornton, CO	Seattle, WA	Difference	Change
Housing	$2,822/mo	$7,536/mo	↑ $4,714more	167.0%
Transportation	$1,411/mo	$1,899/mo	↑ $488more	34.6%
Other	$1,713/mo	$1,975/mo	↑ $262more	15.3%
Healthcare	$621/mo	$824/mo	↑ $203more	32.7%
Groceries	$1,011/mo	$1,079/mo	↑ $67.96more	6.7%
All Utilities	$510/mo	$481/mo	↓ $29.17less	5.7%

Housing

↑ 167.0%

Thornton, CO

$2,822

Seattle, WA

$7,536

Difference

$4,714

Transportation

↑ 34.6%

Thornton, CO

$1,411

Seattle, WA

$1,899

Difference

$488

Other

↑ 15.3%

Thornton, CO

$1,713

Seattle, WA

$1,975

Difference

$262

Healthcare

↑ 32.7%

Thornton, CO

$621

Seattle, WA

$824

Difference

$203

Groceries

↑ 6.7%

Thornton, CO

$1,011

Seattle, WA

$1,079

Difference

$67.96

All Utilities

↓ 5.7%

Thornton, CO

$510

Seattle, WA

$481

Difference

$29.17

less

🏠Rent Comparison

Studio

From$1,378

To$2,180

↑ $802

1 Bed

From$1,469

To$2,260

↑ $791

2 Bed

From$1,748

To$2,630

↑ $882

3 Bed

From$2,289

To$3,440

↑ $1,151

Thornton, COZIP-level data

1BR range: $1,790–$1,790/mo

Seattle, WAZIP-level data

1BR range: $1,900–$3,210/mo

💡 Note: Rent prices are based on HUD Fair Market Rent data and represent median costs. Actual prices vary by neighborhood, amenities, and condition. Source: HUD Small Area Fair Market Rents FY2026.

$8,088

Monthly in Thornton, CO

$13,794

Monthly in Seattle, WA

$5,706

Difference

Home Values

Thornton

Seattle

$417K

Median Value

$808K

↓ -3.5%

YoY Change

↓ -2.5%

↑ +19.7%

5-Year Change

↑ +12.5%

$417K

Price Range

$433K - $1.34M

Homes in Seattle are 94% more expensive than Thornton

Calculate payment - Thornton Calculate payment - Seattle

Source: Zillow Home Value Index (ZHVI), January 2026

Tax Comparison

Annual tax burden comparison at $150.0K salary

Tax Savings

↑ $6.6K

Per year

Monthly Difference

$550

More take-home

Effective Rate Diff

4.4%

Rate difference

Thornton, CO

Federal Income Tax

Effective: 18.9%

$25.5K

Colorado State Tax

Effective: 4.4%

$6.6K

FICA Taxes

Social Security + Medicare

$11.5K

Total Taxes

Effective: 29.1%

$43.6K

Take-Home Pay

$8,866/month

$106.4K

Seattle, WA

Federal Income Tax

Effective: 18.9%

$25.5K

Washington State Tax

No state income tax

FICA Taxes

Social Security + Medicare

$11.5K

Total Taxes

Effective: 24.7%

$37.0K

Take-Home Pay

$9,416/month

$113.0K

Additional Tax Information

Thornton, CO Tax Rates

Sales Tax:7.8%

Property Tax:0.5%

Seattle, WA Tax Rates

Sales Tax:9.2%

Property Tax:0.9%

💡 Note: Tax calculations are estimates based on 2024/2025 tax brackets for single filers with standard deduction. Actual taxes may vary based on filing status, deductions, credits, and local variations.