Washington Real Estate Transfer Tax Calculator

Washington's Real Estate Excise Tax under RCW 82.45.060 is a marginal bracket schedule that climbs sharply at the top: 1.1% on the portion of the sale price up to $525,000, 1.28% up to $1,525,000, then a much steeper 2.75% up to $3,025,000, and 3.0% on anything above that, thresholds that adjust for inflation every four years. Most cities and counties separately impose the maximum permitted local rate of 0.25% on top of the state brackets, so nearly every Washington transaction carries that local add-on as a practical matter rather than an exception.

The excise tax is customarily paid by the seller at closing, consistent with how it is structured under RCW 82.45, though the specific allocation can be addressed in the purchase contract. Among the bracketed states in this dataset, Washington's top marginal rate of 3.0% is exceeded only by New Jersey's mansion fee cliff at 3.5% on its highest tier.

Using the calculator's baseline $380,000 sale price, which falls entirely within the first bracket:

• Sale Price: $380,000
• Combined rate in first bracket: 1.10% state + 0.25% local = 1.35%
• Transfer Tax Due: $380,000 × 0.0135 = $5,130.00
• Net Proceeds After Tax: $380,000 minus $5,130 = $374,870.00
• Effective Rate: 1.350%

At the higher-value scenario of $1,500,000, the sale crosses into the second bracket: the first $525,000 is taxed at the combined 1.35% ($7,087.50), and the remaining $975,000 is taxed at the combined 1.53% ($14,917.50). Combined transfer tax due: $7,087.50 + $14,917.50 = $22,005.00, an effective rate of roughly 1.47%, illustrating how the effective rate climbs as more of the price falls into higher brackets.

• Jurisdictions charging less than the maximum local REET. A small number of Washington cities and counties impose a local REET rate below the 0.25% maximum this calculator uses as its baseline, which would modestly lower the effective total in those specific areas.
• The flat rate for timberland and agricultural land. Washington taxes qualifying timberland and agricultural property at a flat 1.28% state rate instead of the graduated bracket schedule, a distinct classification this calculator does not model.
• Exemptions for certain transfer types. Washington exempts certain transfers, including those between spouses or domestic partners, into revocable trusts, and by operation of law, from REET. This calculator assumes a standard taxable arm's-length sale.
• Additional voter-approved local REET for specific purposes. Some Washington jurisdictions have authorized supplemental REET increments for affordable housing or conservation funding beyond the standard local rate, which are not modeled in this calculator's baseline.

• Applying the top bracket's combined rate to the entire sale price. Washington's REET is marginal at every tier, so only the portion of the price within each bracket is taxed at that bracket's rate; applying 3.25% to the full price of a $4,000,000 sale instead of just the amount above $3,025,000 substantially overstates the tax.
• Forgetting the local REET component. The state bracket schedule alone understates total tax due, since nearly every Washington jurisdiction adds its own local REET on top of the state brackets.
• Assuming every jurisdiction charges exactly 0.25% locally. While 0.25% is the maximum and most common local rate, a handful of jurisdictions charge less, and confirming the exact local rate with the county treasurer avoids a small but real discrepancy.
• Confusing REET's marginal structure with a cliff-style mansion tax. Unlike New York's or New Jersey's mansion tax, where crossing a threshold can apply a rate to the full price, Washington's REET brackets are genuinely marginal at every tier, so liability increases smoothly rather than jumping at each threshold.

• Washington Department of Revenue: Real Estate Excise Tax guidance under RCW 82.45.060
• Engine table: engine/tables/2026/state-real-estate-transfer-tax.json, Washington entry, verified 2026-08-21