How to Invoice After Pressure Washing, Line by Line

Short answer: How to invoice after pressure washing, in order: one line per surface with the measured square footage and the method used (surface cleaner at 3,500 PSI on concrete, soft wash under 500 PSI on siding), then separate lines for chemistry, stain pretreatment, water haul, access, and wash water recovery. Apply your minimum service charge when the measured lines land under it. Attach the before and after photos, and collect on site before you unhook the trailer.

A pressure washing invoice fails in exactly one way: it reads “Pressure washing — $625,” and the customer decides that number is negotiable because nothing on the page explains it. The fix is to put the measured surfaces, the method, and the chemistry on the paper. The general checklist in what to include on an invoice covers the basics; below are the parts that only matter when you are dragging 200 feet of hose across somebody’s lawn.

What has to be on a pressure washing invoice?

Write it while the trailer is still hooked up. Every block below is either something you measured or something you will want six weeks from now when the algae starts coming back.

Block	What it reads
Property and surfaces	Address, then each surface with its measured ft² or linear ft
Method per surface	Surface cleaner PSI, soft wash, hand detail, downstream or 12V
Chemistry	The mix used per surface, and the post-treat
Pretreatment	Stain type, spot count, dwell time (oil, rust, artillery fungus, gum)
Site conditions	Water source, tank haul, hose run, second story, gated access
Wash water	Containment and recovery, disposal, where it went
Setup and travel	Trailer setup and teardown, or the minimum service charge
Condition notes	Pre-existing damage found and photographed before starting
Photos	Count of before and after images, timestamped
Totals and terms	Subtotal, tax if your state taxes cleaning, due on completion

The condition notes line is the one nobody writes and everybody needs. Chalky oxidized siding, failing mortar joints, curled shingles, a section of driveway somebody else already etched with a turbo nozzle, rotted deck boards, torn screens, an unsealed exterior light — photograph it and name it on the invoice before you pull the trigger. That paragraph is what answers the phone call three days later.

Should I bill by the square foot or by the surface?

Both, on the same invoice, with one line per surface. Never let flatwork and a house wash collapse into a single number, because they are different pressures, different chemicals, and different risk.

Surface	Bill by	How the line reads	Method on the line
Concrete driveway, walk, patio	ft²	Concrete driveway, 940 ft²	Surface cleaner, 3,000–4,000 PSI, post-treat
Paver patio	ft²	Paver patio, 420 ft²	Surface cleaner, then joint sand as its own line
Vinyl or aluminum siding	ft² of wall, or per elevation	House wash, 1,850 ft² wall area	Soft wash under 500 PSI
Brick and masonry	ft²	Brick facade, 610 ft²	Low pressure, mortar checked before start
Wood deck or fence	ft², or linear ft × height	Cedar deck, 340 ft²	500–1,200 PSI fan tip, cleaner plus brightener
Asphalt shingle roof	ft² of roof plane	Roof soft wash, 1,400 ft²	No pressure, applied and rinsed
Gutter faces	linear ft	Gutter brightening, 168 lf	Hand applied, hand rinsed

Measure it and print the number. “Driveway” is an opinion; “940 ft²” is a fact, and it is also how you hold the price when the neighbor claims he got a driveway done for $200. If you are still setting those per-foot numbers, work through how much to charge for pressure washing before you build the invoice around them.

One rule to keep the math honest: pick a single house wash convention — wall area or elevation count — and stay in it for the whole invoice. Mixing methods inside one document is how a customer finds a discrepancy and treats the whole page as guesswork.

How do I write the chemical and soft wash lines?

Name the chemistry per surface, never as one lump called “chemicals.” A single “chemicals — $85” line reads like a fuel surcharge and invites a haggle.

Job	Chemical line	Second line, if applicable
House wash	Soft wash mix, sodium hypochlorite with surfactant	Landscape pre-wet and tarp protection
Roof	Roof soft wash application and rinse	Gutter and downspout flush
Concrete	Post-treat to kill algae and mold in the pores	—
Wood deck	Wood cleaner (percarbonate or sodium hydroxide)	Oxalic acid brightener, neutralizing rinse
Rust staining	Oxalic acid rust treatment, 4 spots	Note: irrigation rust returns without a filter
Oil and grease	Degreaser pretreat with dwell, 3 spots	Hot water pass if you carry it

Two of those deserve a sentence in the notes field. Concrete post-treat is what keeps the driveway clean for a season instead of six weeks, so when a customer declines it, write the decline on the invoice: “Post-treat declined. Organic growth will return sooner.” And wood is a two-step process by nature — the cleaner opens the grain and the brightener resets the pH — so it is two lines, not one, and the invoice should say so.

Soft washing is not a cheaper version of pressure washing. It is more chemical, more dwell time, and more rinsing, and the only thing missing is the pressure that would drive water behind the siding or strip granules off a roof. Price and describe it that way, or customers assume low pressure means low effort.

Which site conditions get their own line?

The surfaces set the base price. These are what actually move a job from profitable to break-even, and every one of them belongs on the page as its own line.

Condition	Line on the invoice	Why it costs
No usable spigot or non-potable water	Water haul and tank fill	A pro machine pulls 4–8 GPM; a house spigot barely feeds it, and no spigot means hauling
Second story and above	Elevated soft wash, ladder or extension access	Slower, two-person on some sites, higher risk
Long hose run or gated-only access	Extended setup, 200 ft hose run	Setup and teardown are the real clock
Wash water containment	Containment, vacuum recovery, disposal	Required on many commercial flatwork sites
Heavy organic or stain load	Pretreat and second pass, named by stain	Dwell time is labor even when nothing is running

Wash water is the one with rules attached. Runoff from cleaning that carries detergent, oil, or grease into a storm drain is a discharge, and it is regulated under the federal NPDES stormwater program with the specifics set by your state and municipality. Restaurant pads, dumpster corrals, fuel islands, and fleet lots are where you get asked. When you contain and recover, put the recovery and the disposal on the invoice and keep the disposal ticket, because a property manager’s compliance file is the reason they hired a licensed contractor instead of a kid with a hose.

When does the minimum charge show up on the invoice?

On any job where the measured lines fall below your floor — which for a small operator is most single-surface residential calls. The cost of pressure washing is not the washing. It is the drive, the unhook, the fill, the hose run, the teardown, and the drive back.

Look at a 180 ft² front walkway at an example rate of $0.22/ft². The measured line is $39.60. Setup, production, teardown, and travel on that stop run past an hour. The floor used in the table below is $175, and it is an illustration rather than a going rate — yours moves with your drive radius, fuel, water haul, and what the machine and the insurance cost to put on the road, and it sits visibly higher in a dense metro than on a rural route. Once you have your own number, you have two clean ways to show it:

Approach	How the invoice reads	Best for
Named minimum	”Minimum service call — includes up to 250 ft² of flatwork” as one line	Residential, quoted on the phone
Measured plus adjustment	”Concrete walkway, 180 ft² — $39.60” then “Minimum service adjustment — $135.40”	Customers who asked for the square foot rate

The second version looks blunt, and it is the one that sells the next surface. A customer staring at a $135 adjustment line asks what else you can do while you are set up, and the driveway you add costs them a fraction of a second trip. Say the minimum on the phone before you drive out. Discovering it on the invoice is what turns a routine minimum-charge stop into a forty-minute argument.

Should before-and-after photos go on the invoice?

Yes, and it ends most disputes before they start. Clean concrete looks unremarkable within ten minutes; the only proof of what you did is the frame you shot before you started.

Shot	When	Framing
Whole surface, before	Before the first drop of chemical	From a fixed spot — corner of the garage, end of the walk
Whole surface, after	Same spot, same lens, same day	Identical framing so the pair reads as one comparison
Pre-existing damage	Before start, close up	Etching, chalking, cracked mortar, curled shingles, rot
Worst stain, before and after	Both	Include a reference object — expansion joint, downspout
Recovery and disposal	On commercial sites	Containment in place, ticket in frame

Attach them to the invoice PDF or reference the count on the paper: “8 before, 8 after, timestamped, on file.” Pair the photos with an honest sentence where results are limited: “Oil shadowing below the surface is pre-existing staining in the porous concrete, reduced but not removed.” That line costs you nothing and buys you every callback you avoid.

How do I get paid before I unhook the trailer?

Walk the job with the customer while the surfaces are still wet and the contrast is at its peak. Hold the phone up with the before photo next to the actual driveway, then hand them the invoice on the same screen with the payment link rendered as a QR code they scan on the spot.

Residential is due on completion. Not “I will email it tonight,” which becomes Thursday, which becomes a text you send twice. Larger commercial work takes a deposit and a balance at completion. Check whether your state taxes cleaning services before you decide whether the invoice carries a tax line — plenty do, and it is easier to collect once than to chase later.

What changes on a commercial or recurring invoice?

	Residential, one-off	Commercial or recurring
Priced from	Surfaces measured that day	Contracted scope per visit
Terms	Due on completion	Net 30 with a PO number
Cadence	One invoice per job	Per visit, or a monthly rollup by site
Required fields	Address	Site or store number, PO, date and time on site, crew names
Extra lines	Rare	Wash water recovery, after-hours window, insurance certificate on file

Missing the PO number is why one invoice pays in a week and an identical one sits for sixty days in someone’s accounts payable queue, which is the whole subject of how to get clients to pay. For recurring flatwork, keep the measured square footage on every visit’s invoice even though nothing changed. It is what stops a new property manager from deciding two years in that the scope was smaller than it is.

What should I keep after the invoice goes out?

Keep the invoice, the before and after photos tied to that job, the chemical purchase receipts, the disposal ticket if you contained wash water, and the miles you towed. The photos are the dispute defense. The receipts and the mileage are the deduction. The moment a customer pays at the door, the paid confirmation becomes a separate document from the invoice, which is the practical difference laid out in invoice vs receipt and the thing a property manager asks for months later.

Keel is an iOS app that runs entirely on the device: no account, no bank connection, no cloud, no login, and an App Store privacy label that reads Data Not Collected. In practice, that means the invoice gets built in the driveway while the trailer is still hooked up — your logo, your numbering, the surface lines you just measured, and the payment link as a QR code the customer scans off your screen. Photograph the SH and surfactant receipt at the supply counter and Apple Intelligence reads it on the phone. Tows between jobs get logged. At year end it exports as one file, or as the Accountant Pack: a CSV plus a one-page summary PDF. The ledger is append-only and hash-chained, so nothing quietly changes after the fact. Free is $0 with unlimited invoices, receipts, and mileage; Keel Pro is a one-time $249.99 lifetime purchase, not a subscription.

Frequently asked questions

Should a pressure washing invoice list square footage?

Yes, for every measured surface. “Concrete driveway, 940 ft²” defends the price in a way that “driveway” cannot, and it gives you a record when the same customer calls next season or a property manager questions the scope two years later. It also stops a neighbor’s cheaper quote from being a fair comparison, since that quote was almost certainly for a smaller slab.

How do I bill a job where the oil stain did not fully come out?

Bill the pretreatment as its own line and write the result in plain words on the invoice: degreaser applied with dwell to three spots, hot water pass, shadowing reduced but not removed because the oil sits below the surface in porous concrete. Say the same thing during the walkthrough with the before photo in hand. Customers accept an honest limit; they do not accept discovering it alone.

What is a reasonable minimum charge for pressure washing?

Calculate it rather than copying a number. Add your round-trip drive, setup, teardown, fuel and chemical for the smallest job you will accept, then add the hourly rate you need to earn. That total is your floor, and most single-surface residential calls land under it. Say the minimum on the phone before you drive out, and print it as a line on the invoice.

Do I charge extra if the property has no water?

Yes, as a separate water haul line. A professional machine draws roughly 4 to 8 gallons per minute, more than many house spigots comfortably supply, which is why a buffer tank is standard equipment. No usable or potable source at all means hauling water, and that is fill time, weight, and often a second trip. Confirm the water source when you book the job.

Should before-and-after photos be attached to the invoice?

Attach them or reference their count and timestamps on the invoice. Shoot each surface from a fixed spot before the first chemical goes down and again from the identical spot afterward. Also photograph pre-existing damage — chalky siding, cracked mortar, curled shingles, previously etched concrete — before you start. That set of images resolves nearly every dispute without a second visit.

Is pressure washing taxable on the invoice?

It depends on your state, and many states do treat cleaning services as taxable while others tax only tangible goods. Some draw the line at residential versus commercial property. Check your own state revenue department rather than trusting a software default, then apply it consistently on every invoice. Collecting it wrong for a year is far more expensive than reading the rule once.

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This article is general information, not professional or tax advice.