Renting vs buying in Washington: the 5-year math

Deciding whether to buy a home in Washington state often comes down to a race between rising equity and the heavy friction of transaction costs. If you plan to move again in three years, the math almost never works in your favor, but at the five-year mark, the financial outcome shifts from a clear loss to a nuanced calculation of risk and opportunity.

Between 2019 and 2024, Washington’s median home price climbed significantly, creating a sense of urgency for renters. However, high interest rates and stiff property taxes have changed the equation. To understand the real cost of ownership, we must compare a monthly rent of $2,650 against a $650,000 starter home—a price point typical for a modest condo in Seattle or a small single-family home in Pierce or Snohomish County.

The hidden weight of the entry and exit

Most prospective buyers focus on the monthly mortgage payment, but the five-year math is actually driven by the bookends of the investment. Buying a $650,000 home requires more than just a down payment. Closing costs in Washington typically range from 2% to 5% of the purchase price. At a conservative 3%, a buyer pays $19,500 just to receive the keys. This is "sunk" money that provides no equity; it is a fee paid to lenders, title companies, and the state in the form of excise taxes.

The exit is even more expensive. In Washington, the seller traditionally pays the commission for both the listing agent and the buyer’s agent, totaling roughly 5% to 6% of the sale price. On a $650,000 home, that is a $39,000 hit to the bottom line. When you add the state’s graduated real estate excise tax (REET)—which starts at 1.1% for the first $525,000—the cost of selling wipes out a massive portion of any appreciation gained over five years.

If your home appreciates by 4% annually, it will be worth approximately $790,000 after five years. On paper, you have gained $140,000 in equity. However, after paying $47,000 in commissions and taxes to sell it, and accounting for the $19,500 you spent to buy it, your "real" gain drops significantly. This friction is why the five-year horizon is the absolute minimum for most Washington buyers; anything shorter, and the transaction costs likely exceed the appreciation.

Monthly cash flow and the 1% rule

A renter paying $2,650 per month has a predictable, ceiling-capped liability. Over 60 months, assuming a 3% annual rent increase, that renter will spend approximately $169,000 on housing. This money is gone, but the renter’s responsibility ends with the check.

The homeowner’s monthly experience is more volatile. On a $650,000 home with 20% down ($130,000) and a 6.8% interest rate, the principal and interest payment is roughly $3,390. Property taxes in Washington vary by county but hover around 1% of assessed value. In King or Snohomish County, that adds roughly $540 a month. Homeowners insurance adds another $150. Your starting "carrying cost" is $4,080—over $1,400 more than the renter’s monthly payment.

Then there is the "1% Rule" for maintenance. Houses in the Pacific Northwest face specific environmental pressures: moss growth on roofs, gutter cleaning necessitated by heavy evergreen debris, and the constant battle against moisture in crawlspaces. A homeowner should budget 1% of the home’s value annually for maintenance and repairs. On a $650,000 home, that is $6,500 a year, or $541 a month.

When you add it all up, the homeowner is spending $4,621 per month compared to the renter’s $2,650. This creates a "monthly deficit" of $1,971. For ownership to make sense, the home must appreciate enough to overcome this monthly cash-flow gap, plus the transaction costs.

The opportunity cost of the down payment

One of the most overlooked factors in the Washington housing market is what else that $130,000 down payment could have done over five years. This is the "opportunity cost." If a renter takes the $130,000 they would have used for a down payment and places it in a low-cost S&P 500 index fund, history suggests a conservative 7% annual return.

After five years, that $130,000 would grow to approximately $182,300. Furthermore, the $1,971 per month that the renter saved by not having a mortgage and maintenance bills could also be invested. If the renter invested just half of that monthly difference ($985) into the same 7% fund, they would have an additional $69,000 after five years.

For the homeowner, the down payment is "locked" in the walls of the house. It earns a return only if the house appreciates. If the Washington housing market remains flat or grows at a sluggish 2%, the renter who invested their cash in the stock market will almost certainly end the five-year period with a higher net worth than the homeowner. Ownership is a leveraged bet on a single asset in a single geographic market; renting and investing is a diversified bet on the broader economy.

Taxes and the phantom "write-off"

Buyers often cite the mortgage interest deduction as a primary reason to purchase. However, the 2017 Tax Cuts and Jobs Act significantly raised the standard deduction. For a married couple filing jointly in 2024, the standard deduction is $29,200.

While a homeowner with a $520,000 mortgage at 6.8% will pay roughly $35,000 in interest in the first year, they only benefit from the amount that exceeds the standard deduction. In this scenario, the "extra" deduction is about $5,800. At a 24% marginal tax rate, that results in a tax savings of only $1,392 for the year—or $116 a month. This is a far cry from the massive tax windfall many buyers expect. It barely covers the cost of a single professional gutter cleaning and a tank of water heater sediment flushing.

Washington’s lack of a state income tax means there is no additional state-level deduction to claim, unlike in Oregon or California. This makes the federal tax benefit even thinner. When evaluating the five-year math, the tax "shield" is a minor footnote, not a structural pillar of the investment.

Forcing a breakeven analysis

To find the breakeven point, we have to look at the "net wealth" at the end of month 60.

The Renter's Side: The renter has paid $169,000 in rent. They have a brokerage account that has grown from $130,000 to roughly $250,000 (assuming they invested the down payment and a portion of the monthly savings). Their net housing-related wealth is $250,000.

The Homeowner's Side: The homeowner has paid $244,800 in mortgage, taxes, and insurance. They have paid $32,500 in maintenance. They paid $19,500 in closing costs. Total out-of-pocket: $296,800. However, they have a house. If the house appreciated by 4% annually, it is worth $790,000. They still owe roughly $485,000 on the mortgage. After selling the house and paying $47,000 in fees, they walk away with $258,000 in cash.

In this specific 4% appreciation scenario, the homeowner and the renter end up almost exactly at the same spot after five years. The homeowner has $258,000 in cash; the renter has $250,000 in their brokerage account.

However, this "breakeven" is fragile. If appreciation is only 3%, the homeowner loses. If a major system like the HVAC or roof fails in year four, the homeowner loses. If the stock market returns 10% instead of 7%, the renter wins by a landslide. Ownership in Washington only becomes a clear, dominant winner when the timeframe extends to 7 or 10 years, allowing the principal paydown to accelerate and the appreciation to compound.

Assessing the lifestyle premium

The math rarely accounts for the "utility" of the home. In Washington’s competitive rental market, a $2,650 rent might get you a two-bedroom apartment in a managed complex. Buying a $650,000 home might get you a three-bedroom house with a yard and a garage. For a family, the extra space and the stability of not facing a landlord’s decision to sell the property may be worth the financial "deficit" or the risk of lower returns.

Conversely, the renter enjoys "mobility liquidity." If a job opportunity opens in the Vancouver tech hub or a medical residency starts in Spokane, the renter can leave within 30 days. The homeowner is tethered to the property by those high exit costs. Selling a home in a "down" month or a slow season can cost an extra 2-3% in concessions, further pushing back the breakeven point.

In Washington, the decision to buy is a bet that the state’s constrained housing supply will continue to drive appreciation above the national average. If you believe the Puget Sound area or the growing hubs in Eastern Washington will continue to see 5% or 6% annual growth, buying is a powerful wealth generator. If you believe we are entering a period of stagnation or 2% growth, renting is the mathematically superior path.

Run your own numbers using a 5% selling cost and a 1% annual maintenance budget to see if your "dream home" is actually a profitable investment. If you aren't certain you will stay for at least sixty months, stay in the rental and put your down payment into a high-yield environment where it can grow without being eaten by excise taxes.