Monthly Mortgage Payment on a $400K House
A labeled PITI-plus-PMI table for a $400k home at four down payments, plus rate sensitivity, tax and insurance scenarios, and a cash-to-close example.
A Seattle home budget built from dated Census, Freddie Mac and CFPB figures, covering cash to close, the monthly payment and the ongoing costs buyers tend to forget.
Published · 6 min read

The Census Bureau's 2020–2024 estimates put the median value of an owner-occupied home in Seattle at $938,600, and a down payment and closing costs come on top of that. Below, that benchmark is turned into estimates for cash to close and the monthly payment, and every projected number is labeled as an estimate.
These are the dated benchmarks used throughout this guide:
Treat these as benchmarks, not a quote for any specific home. Home value and owner costs describe Seattle owners as a group, so your own numbers will depend on the price, loan and property you choose.
Cash to close is the down payment plus closing costs, minus any credits. FHA loans require as little as 3.5% down, while a down payment below 20% of the target price likely means paying for mortgage insurance.
To see how the formula works, one calculator example shows a $400,000 home with $80,000 down. It has closing costs of about $12,654.79 and needs about $92,654.79 in cash to close, and the source notes that fees vary by state, lender and home.

Example: Say you buy at $938,600 (the Census median value, used here as a stand-in price), with closing costs at the low end (2%) and high end (5%) of the CFPB range and no credits.
| Down payment | Down payment amount | Closing costs (2%–5%) | Estimated cash to close |
|---|---|---|---|
| 3.5% | $32,851 | $18,772–$46,930 | $51,623–$79,781 |
| 10% | $93,860 | $18,772–$46,930 | $112,632–$140,790 |
| 20% | $187,720 | $18,772–$46,930 | $206,492–$234,650 |
These totals leave out moving costs, any cash reserves you want to keep and other personal expenses. Once you have a lender, ask for the Loan Estimate to replace the range with real figures.
Closing costs are a bundle of smaller charges. Here are the common pieces:
Example: On the 20%-down loan above ($750,880), an origination fee of 0.50% to 1% would be about $3,754 to $7,509.
Lenders must give you the Closing Disclosure at least three business days before closing. Compare it line by line with your Loan Estimate so nothing surprising shows up at the table.
Our sources do not include verified figures for Washington-specific items such as transfer taxes or title and escrow fees. Ask your lender and the escrow or title company for an itemized estimate early in the process.
The CFPB says the total monthly home payment includes principal, interest, property taxes, mortgage insurance and homeowner's insurance. A rate-based estimate shows how much of that is just the loan.
The Freddie Mac 30-year fixed mortgage rate average was 7.24% for the week of October 29, 2026. Rates change weekly and this guide makes no forecast, so check a current rate before you rely on these numbers.
Example: Using M = P·r(1+r)^n / ((1+r)^n − 1) with r = 0.0724 / 12 ≈ 0.006033, n = 360 months and (1+r)^n ≈ 8.719, on the $938,600 price:

| Down payment | Loan amount | Principal and interest | Median property tax (÷12) | Subtotal |
|---|---|---|---|---|
| 3.5% | $905,749 | about $6,173 | about $611 | about $6,784 |
| 10% | $844,740 | about $5,757 | about $611 | about $6,368 |
| 20% | $750,880 | about $5,117 | about $611 | about $5,728 |
The tax column spreads the $7,337 Census median over 12 months, so it is a stand-in, not a bill for a particular home. Mortgage insurance, homeowner's insurance and HOA dues are not included, so get quotes for each.
The 3.5% row uses the same average rate as the other rows, so treat it as a rough stand-in. If you are considering an FHA loan, ask a lender for loan-specific rates and insurance costs.
The 30-year fixed average was 7.03% for the week of September 24, 2026, lower than the 7.24% of October 29, 2026. In the same example, the 20%-down loan at 7.03% works out to about $5,011 a month, roughly $106 less in principal and interest.
The Census median owner cost of $3,505 per month is for Seattle housing units with a mortgage. It describes owners in general, so it is not a quote for a new loan today. To test your own numbers, try the mortgage calculator.
In the Census data, median real estate taxes paid in Seattle were $7,337 per year. That works out to roughly $611 a month, but the tax on a specific home depends on its assessment and local levies, and our sources do not include verified details on King County's assessment methods.
Insurance is a separate line item. Homeowner's insurance generally does not cover floods.
Our sources also have no verified Washington premium figures, so it helps to request insurance quotes before you make an offer. Ask whether the property sits in a flood hazard area, and ask your lender what coverage it will require.
Seattle's median household income was $123,860, which is about $10,322 a month when divided by 12. Setting that next to the other Census medians gives a rough sense of the gap.
| Comparison | Result |
|---|---|
| Median owner costs ($3,505) vs. monthly equivalent of median income | about 34% |
| Median home value ($938,600) vs. median household income | about 7.6 times |
| Example principal, interest and median tax, 20% down | about 55% of that monthly figure |
| Example principal, interest and median tax, 10% down | about 62% |
| Example principal, interest and median tax, 3.5% down | about 66% |
These ratios mix medians from different groups, and the example rows leave out insurance and HOA dues, so they are not qualification rules. Lenders set their own standards, so a preapproval conversation is the best way to learn what you can borrow.
The CFPB advises budgeting for maintenance, repairs and utilities. Use this checklist to build your own monthly total:

Add the monthly items together, then set aside a repair amount you can sustain every month. Compare that total with your take-home pay, not just the lender's approval amount.
Related reading: Cost of Buying a House in Austin: A Budget Guide and Monthly Mortgage Payment on a $400K House.
Checked automatically each week (last update November 6, 2026). Figures in the article above reflect the date it was written; these numbers may be newer.
| Week of | 30-year fixed rate |
|---|---|
| October 29, 2026 | 7.24% |
| October 22, 2026 | 7.32% |
| October 15, 2026 | 7.40% |
| October 8, 2026 | 7.40% |
| October 1, 2026 | 7.28% |
| September 24, 2026 | 7.03% |
| September 17, 2026 | 6.95% |
| September 10, 2026 | 6.76% |
| September 3, 2026 | 6.71% |
| August 27, 2026 | 6.66% |
| August 20, 2026 | 6.65% |
| August 13, 2026 | 6.67% |
| August 6, 2026 | 6.69% |
| July 30, 2026 | 6.66% |
| July 23, 2026 | 6.58% |
| July 16, 2026 | 6.55% |
| July 9, 2026 | 6.49% |
| July 2, 2026 | 6.43% |
| June 25, 2026 | 6.49% |
| June 18, 2026 | 6.47% |
| June 11, 2026 | 6.52% |
| June 4, 2026 | 6.48% |
| May 28, 2026 | 6.53% |
| May 21, 2026 | 6.51% |
| May 14, 2026 | 6.36% |
| May 7, 2026 | 6.37% |
| April 30, 2026 | 6.30% |
| April 23, 2026 | 6.23% |
| April 16, 2026 | 6.30% |
| April 9, 2026 | 6.37% |
| April 2, 2026 | 6.46% |
| March 26, 2026 | 6.38% |
| March 19, 2026 | 6.22% |
| March 12, 2026 | 6.11% |
| March 5, 2026 | 6.00% |
| February 26, 2026 | 5.98% |
| February 19, 2026 | 6.01% |
| February 12, 2026 | 6.09% |
| February 5, 2026 | 6.11% |
| January 29, 2026 | 6.10% |
| January 22, 2026 | 6.09% |
| January 15, 2026 | 6.06% |
| January 8, 2026 | 6.16% |
| December 31, 2025 | 6.15% |
| December 24, 2025 | 6.18% |
| December 18, 2025 | 6.21% |
| December 11, 2025 | 6.22% |
| December 4, 2025 | 6.19% |
| November 26, 2025 | 6.23% |
| November 20, 2025 | 6.26% |
| November 13, 2025 | 6.24% |
| November 6, 2025 | 6.22% |
Source: Freddie Mac via FRED (Federal Reserve Bank of St. Louis). National averages; your quoted rate depends on credit, down payment and loan type.
Seattle city, Washington
Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Medians for the whole city, not a specific home.
In the example above, estimated cash to close ranges from about $51,623 at 3.5% down to about $234,650 at 20% down, before moving costs and reserves. Your own figure depends on price, loan type and lender fees, so ask for a Loan Estimate.
No. FHA loans require as little as 3.5% down, though a down payment below 20% likely means paying for mortgage insurance.
The $938,600 figure is a 2020–2024 5-year estimate of the median value of owner-occupied housing units, so it is not the same measure as the asking price of any given listing.
Lenders must give you the Closing Disclosure at least three business days before closing. Compare it with your earlier Loan Estimate.
A labeled PITI-plus-PMI table for a $400k home at four down payments, plus rate sensitivity, tax and insurance scenarios, and a cash-to-close example.
A breakdown of Austin homebuying costs using Census Bureau and CFPB figures, showing what is fixed, what varies by lender, and how to build a realistic cash-to-close and monthly budget.
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