Water Bill Analysis to Verify Laundromat Revenue: The Real Method

By Jason Taken, business broker · HedgeStone Business Advisors · Updated 2026-09-24 · 10 min read

Scope and method limit: This guide explains gathering and reconciling utility evidence. The water-bill calculator lets you test explicit consumption scenarios. Neither a modeled mismatch nor agreement alone proves revenue, unreported cash or dishonesty. Unequal machine usage, billing dates, settings and shared water use must be investigated.

Why This Test Exists

A laundromat's water meter is the closest thing this industry has to an independent revenue recorder. Every paid washer cycle consumes water, the utility measures it, and neither the seller nor the buyer controls the measurement.

That makes it uniquely valuable in a business where a meaningful share of revenue historically arrived as coin. It also makes it uniquely easy to misuse, and that is why most versions of this analysis you will find are wrong in the same way: they apply one gallons-per-dollar number to a store nobody has measured.

Step 1: Get the Right Documents

Ask for 24-36 months of original water bills, showing meter reads and billed consumption. Also request:

• the serving utility's current commercial rate schedule
• the meter size and the fixed meter charge
• the volumetric rate blocks
• exactly how sewer is calculated, including any multiplier of metered water
• seasonal averaging rules, surcharges, and taxes
• whether the meter and service line belong to the landlord or the tenant
• whether any other premises share the service

A seller-typed summary will not do. The bills carry the meter reads, and the rate schedule carries the sewer method — and you need both.

Step 2: Build the Installed Machine List

Every washer, by model and capacity. Then look up the manufacturer's per-cycle water consumption for each model.

This is where the analysis becomes store-specific. Per-cycle consumption varies substantially by:

• Capacity. A 20 lb machine and an 80 lb machine are not comparable.
• Type. Top-load vertical-axis machines generally use more water per pound than comparable front-load horizontal-axis machines.
• Cycle selection. Extra rinse or hot-wash cycles consume more.
• Model generation. ENERGY STAR reports that certified commercial washers use about 45% less water and are on average 9% more energy efficient than standard models (Source: ENERGY STAR, Commercial Clothes Washers) — a large enough difference to change the whole calculation if you assume the wrong generation.

Manufacturers publish technical documentation with consumption figures; Dexter and Continental Girbau both maintain public technical libraries, and distributors can supply spec sheets for any installed model.

Step 3: Subtract Non-Machine Use

Not all metered water runs through washers:

Read the meter yourself with every machine off and the store closed. If it moves, you have found a leak, and until it is fixed the analysis cannot say anything about revenue.

Step 4: Convert to a Range of Implied Cycles

Take annual billed consumption, subtract the non-machine allowance, and divide by per-cycle consumption — twice. Once using a low per-cycle assumption and once using a high one, reflecting the uncertainty in cycle selection and machine mix.

That produces a range of implied washer cycles, which is the honest output. Then convert to implied vend revenue using the store's weighted average vend price across its capacity mix.

Step 5: Compare and Investigate

Note the asymmetry that traps sellers: consumption implying more volume than the returns show tells a buyer there is unreported income — and tells a lender the returns cannot be relied on. See selling a laundromat with unreported cash.

A Worked Example

Illustrative. Every figure is an assumption, and the point is the method.

A store with 28 washers: 10 at 20 lb, 12 at 40 lb, 6 at 60 lb. Annual billed consumption of 1,940,000 gallons.

Claimed vend revenue of $268,000 sits below the implied range. That is a flag, not a verdict. Candidates, in the order to check them: a leak (read the meter with everything off), a water heater or boiler cycling and dumping, a softener regenerating excessively, free-cycle promotions, or unreported cash.

Claimed vend revenue of $460,000 would sit above the high case, which is a different and more serious problem: the store physically cannot have produced it at those vend prices.

Why Is Water the Best Independent Witness?

Because it is the one input to a laundromat that a third party meters, bills, and keeps records of — and that nobody involved in the sale controls.

Every other measurement in laundromat diligence has a weakness. Tax returns are prepared by the seller's accountant from the seller's figures. Deposits reflect what reached the bank, which is a decision, not a fact. Machine exports exist only on card stores, and they can be edited on some systems. Even a collection audit measures the days you happened to attend.

The water meter has none of those problems. It was installed by the utility, it is read by the utility, and the bill is generated by an organisation with no interest in the purchase price. A seller cannot inflate it to support a revenue claim, and cannot deflate it without also reducing the revenue it implies. It is, in the most literal sense, an independent record.

It also has a property that makes it unusually well suited to this particular business: laundromat water use is almost entirely machine use, and machine water use is close to fixed per cycle. A washer of a given model consumes roughly the same volume every time it runs. That converts a utility bill into a cycle count, and a cycle count into a revenue range — which is exactly the number under dispute.

The limitation is precision rather than direction. This test produces a range, not a figure, and the range is wide enough that it will not distinguish a store earning $95,000 from one earning $105,000. What it will do reliably is tell you whether a store claiming $200,000 of revenue is plausibly doing half that. Overstatement large enough to matter is large enough for this test to catch.

What Do You Do When the Numbers Do Not Reconcile?

Not walk, at least not immediately. A gap between implied and reported revenue has several explanations, and only one of them is dishonesty.

Start by questioning your own inputs. The most common cause of a bad result is a wrong machine list. Confirm every model and capacity against the plate on the machine, not the seller's schedule, and confirm which machines were actually in service during the billing period. A store that replaced eight washers eighteen months ago has two different consumption profiles inside your data window.

Check for a leak. A running toilet, a dripping inlet valve or a failed flush mechanism can consume a startling volume continuously. This produces implied revenue above reported revenue — the store looks like it is hiding income when it is actually wasting water. A plumber's inspection settles it, and if a leak is found, that is a repair the seller should be making regardless.

Check for non-machine use you did not subtract. Wash-and-fold run on the same machines is already counted. A hose bib used by another tenant, an irrigation line, or a shared meter is not, and any of them will distort the result badly.

Check the billing period alignment. Utility periods rarely match calendar months. Comparing a bill covering mid-March to mid-April against April's reported revenue introduces error that has nothing to do with the store.

Only after all four have been eliminated is the remaining gap evidence about the revenue. And even then, the direction matters: implied revenue below reported revenue is the finding that should slow a purchase down, because it is the one consistent with an overstated income claim.

Ask the seller directly, and ask specifically. A vague question invites a vague answer. "Your water consumption implies between X and Y cycles a month, and your reported revenue implies Z — help me understand the difference" is a question that either produces a document or produces a silence, and both are informative.

What This Analysis Cannot Do

Be explicit about the limits, because overconfidence here has cost buyers real money:

• It cannot confirm revenue to the dollar.
• It cannot distinguish unreported cash from a leak without a meter test.
• It cannot account for a machine mix that changed mid-period unless you know when.
• It cannot handle a shared service line without separating the other premises' usage.
• It cannot substitute for the other five verification sources.

Use it as a contradiction detector inside a six-source reconciliation. See how to verify laundromat income.

The Cost Side

While you have the bills, use them for underwriting. Utilities ran a median 20% of gross revenue among CLA survey respondents for 2023 and were the most-cited operator problem at 53%. Model the store's actual water and sewer cost from the rate schedule, not from a percentage, and confirm whether sewer is billed as a multiple of metered water — because in many jurisdictions it is, and it becomes the largest utility line in the store.

What Should You Do Next?

Request the bills and the rate schedule in your first document package, and read the meter with everything off during your first site visit. Those two steps cost nothing and resolve more questions than any other hour you will spend.

A condensed walkthrough is in using water bills to verify revenue.

The Next Step If You Are Looking to Buy

This page is general information about laundromat transactions, not legal, tax, or investment advice, and not a guarantee of sale price, timing, or financing approval. Verify current rules with your own CPA, attorney, lender, and the relevant state or municipal agency before acting.