Seattle, Washington Mortgage Calculator - Estimate Your Monthly Payment with Taxes, PMI & Insurance
Seattle adds a city market adjustment (~0.10%) on top of the King County benchmark (~0.85%), for a combined planning rate near 0.95%. Actual tax bills vary by school, port, library, EMS, and voter-approved levies. On a $400,000 example with 20% down at 6.5% for 30 years, P&I is about $2,023 and tax escrow is about $317/mo—estimated PITI near $2,440 before PMI.
Loan Details
$70,000 · LTV 80%
Buyer Profile
Extra Payment
Optional principal-only payment used to estimate payoff speed and interest savings.
Monthly Payment
$1,770 Principal & Interest · $277 Property Taxes · $125 Other
Embed this calculator
Paste the HTML below into your site or CMS (WordPress Custom HTML, static pages, docs). The iframe loads a lightweight, noindex surface of this tool. Keep the attribution link so visitors can open the full calculator on dailycalcs.com.
- Width is responsive (100%); default height is 900px — raise it if your theme clips the form.
- Host page should be HTTPS; iframe src is always HTTPS.
- Do not remove the “Powered by dailycalcs.com” link — it points to the canonical tool page.
Methodology and limitations
Last reviewed:
Methodology
Uses standard principal-and-interest mortgage math, then models housing-cost inputs such as tax, insurance, PMI, and extra-payment scenarios where available. National pages include worked PITI, term, and PMI comparison examples for planning. Local HMDA denial context and Freddie Mac PMMS rate history snapshots were re-verified on the last-reviewed date.
Limitations
Planning estimate only. Actual approval, escrow, PMI, fees, taxes, insurance, and closing disclosures depend on lender, property, borrower profile, and local rules.
Seattle, Washington Mortgage Calculator - Estimate Your Monthly Payment with Taxes, PMI & Insurance
Washington · King County
Seattle adds a city market adjustment (~0.10%) on top of the King County benchmark (~0.85%), for a combined planning rate near 0.95%. Actual tax bills vary by school, port, library, EMS, and voter-approved levies. On a $400,000 example with 20% down at 6.5% for 30 years, P&I is about $2,023 and tax escrow is about $317/mo—estimated PITI near $2,440 before PMI.
Use this mortgage calculator for Seattle, Washington to estimate the monthly payment with principal, interest, configured annual taxes, eligible exemptions, and assistance programs when the buyer profile matches the conditions.
Enter your income to see your approval odds in Seattle, Washington — based on 29,988 2025 HMDA applications.
What This Estimate Uses
- Geographic level: city
- Configured property tax rate: 0.95%
- Configured benefits or exemptions: 1
- Reviewed sources: 3
What Changes in Seattle, Washington
- Data level used: city. This page uses the most specific available data layer for Seattle, Washington.
- Configured combined annual property tax rate: 0.95% before exemptions and buyer-specific conditions are applied.
Local Tax Assumptions
These are the annual tax assumptions configured for this page. The calculator applies them to the appropriate value, then accounts for exemptions or conditions when the buyer selects them.
- Washington Local Property Tax - 0.850%
- Seattle Property Tax Market Adjustment - 0.100%
Programs and Exemptions Included
These benefits do not mean automatic approval. The calculator models them when the buyer inputs match the configured eligibility conditions.
- Mortgage Credit Certificate (MCC) - 20% of mortgage interest (requires: first-time buyer, primary residence, buyer has a Mortgage Credit Certificate)
When This Estimate Can Change
- The actual property tax bill depends on the address, overlapping taxing jurisdictions, approved exemptions, and appraised value.
- Home insurance, flood insurance, HOA dues, and PMI can vary by property, lender, and buyer profile.
- Configured closing costs include Washington Real Estate Excise Tax, but other settlement charges may appear on a real loan estimate.
2026 Loan Limits in King County, Washington
In King County, Washington, the 2026 FHFA conforming loan limit for a one-unit home is $1,063,750. The approximated FHA one-unit limit is $1,063,750. The national baseline is $832,750; this county is a high-cost area.
Loan limits are set at the county level, not the city alone.
| Units | Conforming (FHFA) | FHA (approx.) |
|---|---|---|
| 1-unit (single-family) | $1,063,750 | $1,063,750 |
| 2-unit | $1,361,800 | $1,362,111 |
| 3-unit | $1,646,100 | $1,646,306 |
| 4-unit | $2,045,700 | $2,045,747 |
National baseline (1-unit): $832,750 · High-cost area
Source: FHFA conforming loan limits 2026 · Snapshot verified · Methodology & CSV
2025 Local Home-Purchase Mortgage Market in King County, Washington
Local home-purchase mortgage market context for King County, Washington: in 2025 Home Mortgage Disclosure Act (HMDA) data, King County logged 29,988 final-action applications. The mortgage denial rate was 6.43% and the originated share was 71.70%.
These figures reflect the county market, not the city alone.
| Metric | King County | State |
|---|---|---|
| Final-action applications | 29,988 | 119,467 |
| Mortgage denial rate | 6.43% | 6.75% |
| Originated share | 71.70% | 72.12% |
Source: FFIEC HMDA (modified LAR, home purchase) 2025 · Snapshot verified · Texas vs California mortgage denial rates (methodology)
ACS 2019-2023 Housing Costs in King County, Washington
In ACS 2023 (2019-2023), the median home value in King County, Washington is $811,200; the median effective property tax rate (taxes ÷ value) is 0.84%; the median price-to-income ratio is 6.6×; 28.0% of owners with a mortgage pay ≥30% of income on housing.
These ACS figures reflect the county, not the city alone.
| Metric | King County |
|---|---|
| Median home value | $811,200 |
| Median real estate taxes | $6,785 |
| Median household income | $122,148 |
| Median monthly owner costs (w/ mortgage) | $3,150 |
| Median effective tax rate (tax ÷ value) | 0.84% |
| Price-to-income ratio | 6.6× |
| Cost burden ≥30% (with mortgage) | 28.0% |
Source: U.S. Census Bureau ACS 5-year 2023 · Snapshot verified
Home Prices & Fair Market Rent in King County, Washington
The FHFA house price index (2024) shows compound annual appreciation of +2.5%/yr (1-year), +6.1%/yr (5-year), and +9.2%/yr (10-year) in King County, Washington (index 428.6). The HUD FY2026 two-bedroom Fair Market Rent for this area is $2,015/month (Seattle-Bellevue, WA MSA).
Price and FMR figures are reported at the county level.
| Metric | King County |
|---|---|
| 1-year appreciation | +2.5%/yr |
| 5-year appreciation (CAGR) | +6.1%/yr |
| 10-year appreciation (CAGR) | +9.2%/yr |
| HUD 2-bedroom FMR | $2,015/mo |
Source: FHFA House Price Index 2024 · Snapshot verified
Source: HUD Fair Market Rents 2026 · Snapshot verified
Nearby location comparison
Planning comparison on a $400,000 home with 20% down, 6.5% fixed for 30 years, and $100/mo insurance. Monthly tax uses each page's configured property tax rate.
| Location | Est. property tax rate | Est. monthly tax | Est. monthly PITI |
|---|---|---|---|
| Seattle (this page) | 0.95% | $317 | $2,439 |
| Clark County | 1.05% | $350 | $2,473 |
| Pierce County | 1.10% | $367 | $2,489 |
| Snohomish County | 0.90% | $300 | $2,423 |
| Spokane County | 1.10% | $367 | $2,489 |
| Thurston County | 1.05% | $350 | $2,473 |
Local Data and Sources
Last editorial verification: May 15, 2026. This page combines the official data layers configured for Seattle, Washington.
The sources used on this page are Consumer Financial Protection Bureau mortgage cost guidance, Washington Department of Revenue property tax statistics, Washington Department of Revenue property tax levies. Each source lists which rate, exemption, or program it validates and when it was last reviewed.
- Consumer Financial Protection Bureau mortgage cost guidance - verified May 3, 2026 - General U.S. mortgage closing-cost and mortgage-cost guidance.
- Washington Department of Revenue property tax statistics - verified May 15, 2026 - Official source for Washington property-tax levy, collection, assessed-value, and tax-rate statistics.
- Washington Department of Revenue property tax levies - verified May 15, 2026 - Official source for Washington levy administration and levy-rate limits.
Frequently Asked Questions
Does Washington have one statewide property tax rate?
No. Washington property taxes depend on local levy districts, including schools, county, city, fire, and other districts. Use this state mortgage calculator to combine that assumption with principal, interest, insurance, and PMI, then drill into county or city pages when you have a specific address.
What Washington transfer tax is modeled?
The state page uses a baseline Washington real estate excise tax estimate. Actual REET can vary by sale price tier and local add-ons. Use this state mortgage calculator to combine that assumption with principal, interest, insurance, and PMI, then drill into county or city pages when you have a specific address.
What is a sample Washington PITI on $400,000?
With 20% down at 6.5% for 30 years, principal and interest are about $2,023. At ~0.95% statewide property-tax planning rate, monthly escrow is about $317; with $100 insurance, estimated PITI is about $2,440 without PMI. Drill into county or city calculators for address-level millage.
Does this King County estimate include Seattle city tax?
No. This county page models the broader King County market. The Seattle city page adds a Seattle-specific layer. Use this county mortgage calculator to combine that local assumption with principal, interest, insurance, and PMI so your monthly PITI estimate is closer to a full housing payment before you talk to a lender.
What property tax rate does the King County mortgage calculator use?
King County uses a local planning benchmark of about 0.85% on this page. On a $400,000 home that is roughly $3,400 per year or $283 per month in escrow before exemptions or special districts. Parcel bills can still differ—verify the levy code on the address you are buying.
What is a sample King County PITI on $400,000?
With 20% down at 6.5% for 30 years, principal and interest are about $2,023. At ~0.85% property tax, monthly escrow is about $283; with $100 insurance, estimated PITI is about $2,406 without PMI. Enter your real price and down payment above to resize the estimate, including PMI if you put less than 20% down.
Do overlapping levies change King County bills?
Yes. King County's ~0.85% planning benchmark can sit under city, school, port, and voter-approved levies. Use this PITI estimate as a baseline, then confirm the levy code on the county parcel record. Use this county mortgage calculator to combine that local assumption with principal, interest, insurance, and PMI so your monthly PITI estimate is closer to a full housing payment before you talk to a lender.
Does Seattle have one simple property tax rate?
No. Seattle bills combine King County, city, school, and other voter-approved levies. This calculator uses a King County benchmark plus a Seattle adjustment as a planning estimate—not a parcel quote. Check the King County assessor for the exact levy code on the address you are buying.
What is a sample Seattle PITI on $400,000?
With 20% down at 6.5% for 30 years, P&I is about $2,023. At ~0.95% combined planning tax, escrow is about $317/month; add $100 insurance for roughly $2,440 PITI without PMI. In practice many Seattle purchases are priced above $400,000, which scales both loan payment and tax escrow.
How does Seattle compare with Tacoma for mortgage costs?
Seattle usually has higher purchase prices and different levy stacks than Tacoma even when statewide rate headlines look similar. Compare both city calculators on the same down payment and rate, then factor insurance and HOA dues. Use the nearby comparison table for a quick tax-rate and PITI side-by-side.