Mortgage Calculator for Washington
Estimate your monthly payment in Washington using adjustable example inputs and official housing resources.
Enter Your Loan Details
Defaults are illustrative inputs, not local averages. Replace taxes, insurance and rate with property-specific estimates.
Planning a purchase in Washington
The prefilled price, tax percentage, and interest rate are illustrative inputs, not verified Washington averages or lender quotes. Replace them with the property's price, a local tax estimate, an insurance quote, and your lender's rate.
Do not cap your personal tax bill increase at 1%
Washington’s 1% property tax levy limit generally constrains a taxing district’s levy growth, not the change in an individual homeowner’s bill. Relative property values and voter-approved measures can produce a different change for a particular home.
For your estimate: Use the assessor’s property-specific annual estimate rather than applying a 1% increase to the seller’s bill. Revisit the estimate after reassessment or changes in local levies.
Washington Department of Revenue: how the levy limit worksPlan for Home Advantage’s deferred second mortgage
The Washington State Housing Finance Commission’s Home Advantage down payment assistance is a deferred second mortgage under the program terms. A zero current payment does not erase the balance: sale, refinancing and other specified events can make repayment due.
For your estimate: Compare the participating lender’s first-mortgage quote and assistance documents together. Include the deferred balance in future sale or refinance planning rather than only comparing today’s monthly payment.
WSHFC: Home Advantage program manualLocal guidance reviewed . Confirm eligibility, funding and property-specific costs directly before making a decision.
Using local estimates in this tool
The tax field multiplies the home's price by a percentage. If your assessor estimates an annual tax bill, divide that bill by the entered home price and multiply by 100. Do not enter an assessment ratio or millage directly. For example, an illustrative $4,800 annual bill on a $400,000 price corresponds to 1.2%; these are not local averages.
This payment includes principal, interest, property tax and home insurance. Budget mortgage insurance, HOA dues, maintenance and closing costs separately.
Official resources and next steps
HUD housing and homeownership resources for Washington provides further counseling and housing contacts.
For FHA financing, use HUD's county and unit-count lookup. Select Washington, the property's county, the calendar year, and the number of units. The 2026 national one-unit floor of $541,287 is a baseline, not a determination of the limit for every county in Washington.
HUD directory reviewed 2026-09-25. HUD state directory. Local figures are not represented as verified statistics.
Amortization Schedule
| Year | Principal Paid | Interest Paid | Tax Paid | Insurance Paid | Balance |
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How to Use This Mortgage Calculator in Washington
Enter the price of the property you are considering in Washington, then adjust the down payment and rate. The payment combines principal, interest, property tax, and insurance. It does not include HOA dues, maintenance, or mortgage insurance.
For example, at the illustrative price of $561,000 and 7% down, the base loan is $521,730. These are calculation examples, not a statement about prices or typical buyers in Washington.
Compare the same home under different rates and down payments. A lower monthly payment from a longer term can still mean more lifetime interest. Confirm taxes and insurance for the property before relying on the estimate.