Seattle vs Denver cost of living
Two mountain cities, two different tax stories on the same offer letter. If you are weighing Seattle against Denver, you are probably comparing clouds and ferries vs sunshine and Front Range sprawl—but your bank account cares about something quieter first: Washington does not take a state wage income tax the way Colorado does, while both metros can still eat rent for breakfast. Below is a rounded teaching sketch at $110,000/year gross plus the real-world levers Americans actually fight over (parking, daycare, ski weekends that are not “free” just because the mountains are close). Run your numbers on the Washington after-tax page and the main calculator with Colorado selected.
At a glance: Seattle-side paychecks often look bigger on the same gross because Washington skips broad state wage income tax (watch for small WA payroll premiums on some stubs). Denver usually shows Colorado state withholding, which can narrow the gap fast. Housing and childcare in both metros can erase paystub wins if you need space near work. Neither city is “cheap”; this page is about which pain shows up where—tax line vs rent line vs car line. Comparing other metros? See other city-pair guides after the sections below.
Metro snapshot: Seattle vs Denver (what people argue about)
Use the table as orientation, then replace every row with your lease quotes, daycare tuition, and insurance PDFs.
| Topic | Seattle area (Washington) | Denver area (Colorado) |
|---|---|---|
| State wage income tax | No broad WA wage income tax; paystub may still show small program premiums (for example WA-paid family leave style lines). | Colorado state income tax on taxable income—most W-2 workers see meaningful state withholding versus Washington. |
| Housing vibe | Puget Sound premium: Seattle and Eastside (Bellevue/Redmond) often land in the “ouch” rent tier for US tech hubs. | Front Range growth: Denver proper and close suburbs heated up with migration; still compare your ZIP to your Seattle ZIP. |
| Mobility default | Bus + light rail + ferries exist, but many households still run a car for Eastside commutes or mountain weekends. | Mostly car-first; winter traction, parking, and mileage add steady monthly lines. |
| “Soft” cost shocks | Grey-season energy, water views that cost money, childcare waitlists that feel like a second rent payment. | Altitude and dry air (humidifiers, skin care—small but real), hail-season insurance stories on homeowners policies. |
Paystub: where Washington and Colorado diverge
Federal tax + FICA do not care if you can see Mount Rainier or the Flatirons—they start the same. The fork is Colorado’s state slice on wages versus Washington’s absence of a broad wage income tax, with Washington program premiums sometimes nibbling the deposit anyway.
Seattle area (WA)
Illustrative month · $110k/yr gross (~$9,167/mo)
- Gross
- $9,167
- Federal + FICA
- −$2,380
- WA wage income tax
- $0
- WA premiums (bundle sketch)
- −$90
≈ Net $6,697
Denver area (CO)
Same gross · Colorado resident sketch
- Gross
- $9,167
- Federal + FICA
- −$2,380
- Colorado state withholding (bundle sketch)
- −$445
≈ Net $6,342
Gap in this model: about $355/month (~$4.3k/year) from tax-like lines before rent—enough to matter, not enough to skip the housing spreadsheet. Run Washington and run Colorado in the main tool with your deductions.
| Line | Seattle (WA) | Denver (CO) |
|---|---|---|
| Gross / mo | $9,167 | $9,167 |
| Fed + FICA | ~$2,380 | |
| State wage income tax | $0 | included in next line |
| CO state withholding (sketch) | — | ~$445 |
| WA premiums (sketch) | ~$90 | — |
| ≈ Net | ~$6,697 | ~$6,342 |
Colorado taxable income can differ from gross because of 401(k), HSA, and other adjustments. Washington premiums vary by employer reporting. Property tax and sales tax still exist in both states outside this wage snapshot.
Housing, altitude, and the “weekend tax”
Americans in both cities joke about outdoor access—then quietly fund it with gear, passes, gas, and lost Saturdays. That is not a line item on Zillow, but it is why two people with the same salary can feel broke for different reasons.
Tie it back to monthly cash
After tax, most US households still solve life with rent, food, car, insurance, savings. If you want a bucket picture before you move, read average monthly expenses and salary needed to live comfortably—then drop your Seattle and Denver numbers into those frames.
Example: Jamie at $110k—same W-2, two different months
Jamie has a remote-friendly role at $110,000 and can anchor in either metro. Jamie is not you, but the order of operations is how most US relocators avoid regret:
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Print the paystub delta Use Washington vs Colorado in the main calculator at the same gross. Notice whether Colorado withholding is the whole story or just chapter one.
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Subtract two real housing lines Maybe Cap Hill vs Fremont on one side and Congress Park vs Baker on the other—whatever matches Jamie’s commute and noise tolerance.
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Keep the lifestyle honest If Jamie will buy season passes + flights out of habit, model that as cash—not as “free because mountains.”
If Jamie itemizes or has RSUs, bonus season, or a partner with W-2 income, the sketch below stops being representative—this is why we link calculators instead of pretending one table fits every US worker.
Comparing a different city pair?
This page is built for Seattle vs Denver—Washington no broad wage income tax vs Colorado withholding, Puget Sound vs Front Range housing, and mountain-west mobility tradeoffs. If your move is really another pair, open the guide written for that tax and housing story (each comparison stays on its own URL for readers and search).
Your next clicks (Income Clarity)
- Washington after-tax income — Puget Sound context, no state wage income tax.
- After-tax calculator (choose Colorado) — Denver paycheck modeling.
- Other city-pair comparisons — California vs Texas and NYC vs Austin (not Seattle vs Denver).
- How much rent can I afford — stress-test the biggest line.
Frequently asked questions
Does Washington tax wages like Colorado?
Not with a broad state wage income tax the way Colorado does. You may still see payroll-funded premiums on a Washington paystub; always read your actual stub.
Which city is better for remote workers?
“Better” is time zone, travel, childcare, and partner job market—not just tax. Use take-home + housing + mobility, then decide if the Mountain West lifestyle is worth the trade for your chapter.
Is Seattle more expensive than Denver?
Seattle-area housing can be steeper in many neighborhood matches, while Denver’s state tax line can claw back paystub advantage from Washington. The expensive city is whichever side leaves less slack after your real bills.
Where should I start if I only have 20 minutes?
Same gross in both calculators, then a quick two-address rent check on whatever listing sites you trust. If those two steps disagree with your gut, trust the spreadsheet.