Buyer resource
Seattle & Bellevue mortgage calculator
Estimate your full monthly housing cost — principal, interest, property taxes, homeowners insurance, HOA, and mortgage insurance — using current Freddie Mac rates for the Seattle and Eastside market.
Rates: Freddie Mac Primary Mortgage Market Survey via Federal Reserve (FRED) · Updated May 28, 2026
Home price
Loan amount: $680,000 · LTV: 80.0%
Down payment
Loan term
Interest rate
Monthly cost estimates
King County estimate · 0.9%/yr
Estimated monthly payment
$5,098
Estimates only — not a lender quote. P&I from standard amortization. Property tax uses King County 0.9% annual estimate; verify with the King County Assessor. PMI estimate assumes conventional coverage and drops at 20% equity. FHA and VA loans have different insurance structures.
Why PITI matters more in Seattle
In a market where median prices regularly exceed $900K, even a small interest rate change moves monthly payments by hundreds of dollars. Lenders qualify you based on total PITI relative to gross income — so understanding all four components helps you shop with a realistic budget before you tour.
King County property taxes average around 0.9% annually, but vary significantly by parcel. The calculator pre-fills this estimate and lets you override it with the actual tax record from any listing.
HOA and mortgage insurance
HOA dues vary widely: most single-family homes in Bellevue and Kirkland have no HOA or a low one ($50–$150/month), while condos and master-planned communities can run $400–$1,200/month. HOA health — not just the monthly fee — matters; underfunded reserve accounts are a common source of post-purchase surprises.
Mortgage insurance (PMI) applies to conventional loans with less than 20% down. It's not permanent — once your equity reaches 20%, you can request removal. FHA loans use a different structure (MIP) that may persist longer; verify the terms with your lender.
Mortgage calculator FAQ
- What does PITI mean?
- PITI stands for Principal, Interest, Taxes, and Insurance — the four components that make up a typical mortgage payment. Lenders use your total PITI to calculate your debt-to-income ratio when you apply for a loan. This calculator adds HOA dues and mortgage insurance on top of PITI so you see your full monthly housing cost.
- Is mortgage insurance required?
- For conventional loans, mortgage insurance (PMI) is typically required when your down payment is less than 20% of the purchase price. PMI usually costs 0.5%–1.5% of the loan amount annually and can be removed once your equity reaches 20%. FHA loans require a mortgage insurance premium (MIP) regardless of down payment — the structure is different and worth discussing with your lender.
- What is the conforming loan limit in King County?
- King County is a FHFA high-cost market, so the conforming loan limit is higher than the national baseline. Loans above this threshold require jumbo financing, which typically comes with stricter underwriting, larger down payment requirements, and slightly different rates. Confirm the current limit with your lender — it adjusts annually.
- How accurate is the property tax estimate?
- The default estimate uses King County's approximate effective rate of 0.9% annually. Actual property taxes vary by specific parcel, assessed value, and any applicable exemptions. For a precise figure, look up the property on the King County Assessor website (kingcounty.gov/assessor) or ask your agent for recent tax records on any home you're considering.
- How do I get the best mortgage rate in Washington?
- Rate depends on credit score, loan-to-value ratio, loan type, and the lender you choose. Borrowers above 760 typically access the best tiered pricing. Comparing at least three lenders — including a local credit union or regional bank familiar with Seattle-area jumbo files and RSU income — often surfaces meaningful differences. Your RexMont agent can connect you with lenders who close reliably and understand Eastside purchase timelines.
Methodology & data sources
Interest rates are sourced from the Freddie Mac Primary Mortgage Market Survey (PMMS), published weekly, via the Federal Reserve Bank of St. Louis (FRED). Property tax uses King County's approximate effective rate of 0.9% annually — verify with the King County Assessor. PMI is estimated at 0.85% annually of the loan amount — a mid-range figure for standard conventional coverage. Actual PMI varies by lender, credit score, and LTV. All figures are estimates and not a lender commitment.