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The Pressure Washing Pricing Mistake Most Owners Don't Catch

June 6, 2026 · 6 min read

Search "how much to charge for pressure washing" and you'll get the same answer everywhere: pick a price per square foot, multiply it by the size of the job, done. It feels simple and fair. It's also how a lot of pressure washing businesses quietly lose money on more than half the jobs they book.

Short answer: Don't price on square footage alone. The same 1,000 sq ft driveway can take one hour or three depending on condition, surface, and access. Start from your true hourly cost, estimate the real time the job needs, and use square footage as a starting estimate — not the final answer.

The flat-rate trap

A flat price per square foot treats every job like it's the same job. It isn't. A driveway with a light layer of dust washes off in one pass. A driveway with three years of rust stains, oil drips, and baked-on grime needs degreaser, multiple passes, and a lot more time standing there with the wand. Both might measure exactly 1,000 square feet. They are not the same job — but a flat per-square-foot rate prices them as if they were.

Same goes for surface and access. Concrete at ground level is one thing. A second-story deck, a stretch of vinyl siding, or a roof that needs a softwash setup and a ladder is a completely different amount of time, risk, and chemical — on the same number of square feet.

Let's run the numbers

Say your true cost to run a job — labor, fuel, water, chemical, equipment wear, and your share of overhead, what SolidScope calls your burdened labor cost — comes out to about $85 an hour.

A simple 1,000 sq ft driveway with light dirt takes about an hour. Your real cost: roughly $85 in labor and overhead, plus $15 in chemical — call it $100. Quote it at 20 cents a square foot and you're charging $200. That's a $100 profit. Good job.

Now picture the same 1,000 square feet, but caked in rust and old oil stains. That job takes three hours and twice the chemical. Your real cost: roughly $255 in labor and overhead, plus $30 in chemical — about $285. Quote it at the same "20 cents a square foot" rate, and you're still charging $200.

Two driveways. Same square footage. One earns you $100. The other costs you $85 to complete. A flat rate can't tell them apart — but your real costs sure can.

Why this quietly drains you

Owners default to a flat per-square-foot rate because it's fast to quote over the phone, it sounds fair, and "that's what everyone in town charges." The problem is that charging the same price for very different amounts of work means your easy jobs are secretly subsidizing your hard ones. As long as most of what you book is the easy kind, you might never notice. But the moment your schedule fills up with the tough jobs — the ones with years of neglect, the two-story jobs, the commercial accounts with grease and grime — that's exactly when your "successful" month quietly turns into a break-even one.

What to actually price on

The fix isn't to throw out square footage — it's to stop treating it as the whole formula. Three things actually drive how long a job takes, and therefore what it costs you to do it:

• Surface type — concrete, wood, composite decking, vinyl siding, and roofing all behave differently and call for different equipment, pressure settings, and chemical.
• Condition — light dust versus mildew versus rust, oil, and years of buildup. This is the single biggest swing factor in how long a job actually takes.
• Access — ground level versus a ladder, lift, or roof work. More time, more risk, more insurance exposure.

Start from your true hourly cost, estimate how long the job will actually take given its real condition and access, and let that number set your price. Square footage becomes your starting estimate — not your final answer.

A simple way to adjust on the spot

You don't need a complicated system. A short walk-through before you quote — even five minutes — is usually enough to sort a job into one of these buckets:

• Light dust or dirt, ground level, easy surface → your base rate
• Moderate buildup — mildew, light staining → base rate × 1.5
• Heavy buildup — oil, rust, gum, years of neglect → base rate × 2 to 2.5
• Second story, ladder, lift, or roof access required → add 25–50%

Five minutes on-site, walking the property and looking closely at what you're actually dealing with, can be the difference between a job that pays you fairly and one that quietly costs you money to finish.

The bottom line

Per-square-foot pricing isn't wrong. It's just incomplete on its own. Anchor your price to what the job will actually cost you to do — your time, your chemical, your equipment, your overhead — and use square footage as a starting point for your estimate, not the finish line for your quote.

Keep reading: What is burdened labor cost, and why it's killing your margins →