Mortgage Guide for Washington

No State Income Tax Boosts Take-Home Pay

Washington is one of nine states with no personal income tax . While lenders use gross income for debt-to-income ratio calculations, the absence of state income tax means Washington borrowers retain more of each paycheck. On a $100,000 salary, a borrower in a state with a 5% income tax would lose $5,000 annually to state taxes that a Washington borrower keeps. This additional cash flow helps with down payment savings, closing cost reserves, and the monthly budget cushion lenders look for during underwriting. The benefit is particularly meaningful in Washington given the state's elevated home prices, where larger down payments and cash reserves are often necessary.

Property Taxes Below the National Median

Washington's effective property tax rate of approximately 0.98% sits below the national median of approximately 1.1% . On a $580,000 home, annual property taxes total roughly $5,684, or approximately $474 per month added to your mortgage payment through escrow. While this rate is moderate nationally, the high median home price means the absolute dollar amount is significant. Lenders include this escrow amount in your DTI calculation, and at $474 per month, the tax burden has a meaningful impact on qualifying income requirements. In King County, where home prices often exceed $800,000, the monthly property tax escrow alone can surpass $650.

Real Estate Excise Tax: A Tiered Transfer Cost

Washington's Real Estate Excise Tax (REET) uses a graduated rate structure rather than a flat percentage. The first $525,000 of sale price is taxed at 1.10%, with increasing rates on amounts above that threshold . On a $580,000 home, the REET totals approximately $6,479 . This is a seller-paid tax by convention in Washington, though it can be negotiated between parties. Some cities and counties impose an additional local REET of 0.25% to 0.50% on top of the state rate. Buyers should confirm the total applicable REET rate for their specific jurisdiction. For a detailed breakdown of how transfer taxes and recording fees affect your closing costs, see the knowledge hub.

High-Cost Counties and Conforming Loan Limits

Washington has approximately 7 counties designated as high-cost areas by FHFA, with King County (Seattle) at the maximum conforming limit of $1,149,825 for a single-unit property. This elevated limit allows borrowers in the Seattle metro to use conventional conforming financing for homes up to that price, avoiding the stricter credit requirements and higher rates typical of jumbo loans. In eastern Washington, where home prices are significantly lower, the baseline conforming limit of $806,500 covers the vast majority of purchases. The FHA floor in Washington counties without a high-cost designation is $524,225, while high-cost counties carry FHA limits that mirror or approach the conforming ceiling.

Community Property State: Spouse Debt Matters

Washington is one of nine community property states . When a married borrower applies for a mortgage, the lender may factor in the non-borrowing spouse's debts when calculating DTI, even if only one spouse is on the loan application. This includes credit cards, auto loans, student loans, and other recurring obligations. For FHA loans, inclusion of the non-borrowing spouse's debts is mandatory in community property states. Borrowers should discuss this with their lender early, particularly if one spouse carries significant debt, as it can reduce the couple's combined purchasing power.

Insurance Costs and Natural Hazard Considerations

Homeowners insurance in Washington averages approximately 0.22% of home value annually, one of the lowest rates in the country. On a $580,000 home, that is roughly $1,276 per year, or about $106 per month. The state's relatively low exposure to hurricanes and tornadoes keeps premiums modest. However, Washington has specific natural hazard risks that may affect certain properties. The Cascadia Subduction Zone creates earthquake risk statewide, and volcanic hazard zones near Mount Rainier and other Cascade volcanoes carry lahar and ashfall risk . Earthquake insurance is not required by lenders but is available as a separate policy. Properties in FEMA-designated flood zones along the Puget Sound shoreline, river valleys, and floodplains require flood insurance, which can add $500 to $3,000 or more annually depending on zone designation.

State Programs Reduce Upfront Costs

The Washington State Housing Finance Commission (WSHFC) administers several programs for homebuyers. The flagship Home Advantage program offers below-market first mortgages paired with down payment assistance of up to 4% to 5% of the loan amount. Additional programs target specific populations, including veterans and buyers in rural areas. Most WSHFC programs require a minimum 620 credit score, income below county-specific limits, and completion of a homebuyer education course. Given Washington's high home prices, these programs are most accessible for purchases in suburban and rural areas outside the Seattle core.

What This Means for Your Monthly Payment

On a $580,000 Washington home with 10% down ($522,000 loan) at a 6.5% interest rate, estimated monthly costs break down as follows: principal and interest of approximately $3,300, property tax escrow of approximately $474, homeowners insurance of approximately $106, and PMI of approximately $218 (assuming 0.5% PMI rate). The total estimated monthly payment is approximately $4,098. The property tax and insurance components account for approximately 14% of the total payment. In King County, where median prices exceed $800,000, monthly totals will be substantially higher. PMI rates vary by credit score, loan-to-value ratio, and insurer, so your actual cost may differ from this estimate. Using the affordability calculator with Washington defaults will give you a personalized estimate based on your income and debts.