Property Taxes in Moses Lake, Washington
Median Moses Lake, Washington effective property tax rate: 1.16%, significantly lower than the national median of 1.02%, and higher than the Washington state median of 0.92%.
Median Moses Lake, Washington home value: $217,747
Median annual Moses Lake, Washington tax bill: $2,482, $82 higher than the national median property tax bill of $2,400.
How are property taxes in Grant calculated?
Property taxes in Moses Lake, Washington are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.
Understanding Moses Lake's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Moses Lake, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
How Does the Moses Lake Property Tax Calculator Work?
Use this Moses Lake property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Moses Lake's median effective tax rate of 1.16% — based on actual property records in Grant County — to generate your estimate.
Enter your property's estimated assessed value — the figure the local assessment system uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Moses Lake's median effective rate across all local levies, providing a more accurate estimate than applying a single county millage rate.
Your bill may vary by ZIP code within Moses Lake: rates range from 1.16% in 98837 to 1.16% in 98837, primarily due to differences in school district levies and local assessment districts.
For a more precise estimate, scroll down to explore ZIP code-level tax rate trends across Moses Lake.
About Moses Lake Property Taxes
About Property Taxes in Moses Lake, Grant, Washington
Moses Lake's median effective property tax rate of 1.16% is lower than the Washington state median of 0.92% and higher than the national median of 1.02%. This rate reflects the Grant County base levy combined with local school district levies and Local improvement districts (LIDs) that vary by subdivision throughout the city.
Property tax rates are not uniform across Moses Lake. Homeowners in the 98837 ZIP code carry a median effective rate of 1.16%, while those in 98837 pay 1.16%. This spread — 0 percentage points across the same city — reflects how school district boundaries and local assessment districts are drawn across Grant County. Understanding which part of Moses Lake you live in can make a meaningful difference to your annual tax bill.
Moses Lake homeowners who believe their assessed value is too high can file a formal appeal with the Tax Assessor before the July 1, 2026 deadline each year.
If your estimated bill above seems higher than expected, Ownwell can review your assessment and protest on your behalf. You only pay if we save you money.
Property Tax Rates Across Moses Lake, Grant County, Washington
As noted earlier, local government entities set tax rates, which can vary widely within a state.
Why? Because annually, each county estimates its required budget to provide services and divides that by the total value of all taxable property within its jurisdiction. This calculation results in the property tax rate.
While there are votes and laws involved in setting tax rates and budgets, in a nutshell, this is the annual process.
Below, you can compare Moses Lake's effective property tax rate to other cities in Washington and the median property tax rates in Washington and the U.S.
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Moses Lake Tax Rate
1.16%
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Grant County Tax Rate
1.12%
Median Effective Washington Tax Rate
0.92%
Median Effective United States Tax Rate
1.27%
Property Tax Rates Across Moses Lake, Grant County, Washington
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 98837 | 1.01% | 1.12% | 1.16% | 1.24% | 1.54% |
Source: Ownwell
Property Tax Assessment Values Across Moses Lake, Grant County, Washington
When examining property taxes in Moses Lake, Washington, understanding the distinction between "market value" and "assessed value" is crucial.
The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. The Grant County assessor estimates the market value for tax purposes.
The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The tax assessed value is the figure used to calculate your property taxes or the amount multiplied by your tax rate to get your tax bill.
Assessment notices:
In Grant County, assessment notices are sent in the spring each year. They'll typically reach your mailbox by the middle of the month.
Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill. By providing insights into how assessed and market values are determined, this section helps property owners navigate their tax responsibilities and understand the valuation processes affecting their property taxes in Moses Lake.
For example, the median home price in Moses Lake is $217,747, with tax bills ranging significantly across the county. 98837 has the highest median home price at $217,747.
Property Tax Assessment Values Across Moses Lake, Grant County, Washington
Source: Ownwell
$24,000
$127,565
$231,130
Median Moses Lake Market Value
$217,747
Median Grant County Market Value
$160,157
Median Washington Market Value
$501,600
Median United States Market Value
$274,101
Property Tax Assessment Values Across Moses Lake, Grant County, Washington
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 98837 | $25,540 | $116,117 | $217,747 | $331,663 | $452,398 |
Source: Ownwell
Property Tax Bills Across Moses Lake, Grant County, Washington
Property tax bills in Moses Lake are calculated by applying local tax rates to a home’s assessed value, which is based on the market value of the property. The assessed value is the starting point for determining how much a homeowner owes each year, and the final bill reflects the combined rates set by local taxing districts in Grant County.
For a home with a median price of $217,747, the property tax bill can vary widely depending on the property’s assessed value and the levies that apply. In Moses Lake, the 25th percentile tax bill is $1,282, while the 75th percentile tax bill is $3,743 and the 90th percentile tax bill is $5,031. The median tax bill is $2,482 in ZIP code 98837.
For homeowners, this means property taxes can be a significant ongoing expense, especially when assessed values rise. Understanding how the bill is calculated can help homeowners better anticipate costs and evaluate whether their tax bill is aligned with the value of their home.
Median Moses Lake Tax Bill
$2,482
Median Grant County Tax Bill
$1,689
Median Washington Tax Bill
$4,512
Median United States Tax Bill
$3,209
Property Tax Bills Across Moses Lake, Grant County, Washington
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 98837 | $413 | $1,282 | $2,482 | $3,743 | $5,031 |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | July 1 |
| Tax Bill | |
| Issued | February 10 |
| Due Date #1 | April 30 |
| Due Date #2 | October 31 |
Links | |
|---|---|
| Grant Tax Assessor | |
| Website | grantwa-taxsifter.publicaccessnow.com |