Buying a Pool Cleaning: Due Diligence Checklist & Red Flags (2026)

Red flag: Less than 70% of revenue comes from recurring weekly/bi-weekly chemical service. A high percentage of one-time repairs, green-to-clean jobs, or pool openings/closings means unpredictable, non-recurring income.

Ask: Can you provide a revenue breakdown, by month, for the last 24 months, separating the weekly chemical-only maintenance route revenue from service calls, pump/filter replacements, and seasonal openings?

Red flag: Average customer tenure under 12 months or a customer list with addresses spread across a 40+ mile radius. Sellers often pad revenue by adding low-margin, distant accounts that bleed fuel costs.

Ask: What is the average tenure of the current active customer base, and can we map the billing addresses to verify that the daily stop density is at least 8–12 pools per day within a 10-mile radius?

Red flag: Chemical costs exceeding 12–15% of service revenue, indicating the seller is either under-dosing pools (leading to algae callbacks) or over-paying for retail-priced tabs.

Ask: Please show the last 12 months of supplier invoices from the chlorine/chemical wholesaler so I can calculate the true cost of goods sold per stop.

Red flag: A significant portion of revenue reported as 'cash collected on site' with no digital trail. This is common in single-person operations but artificially inflates the reported SDE for valuation purposes if not verifiable.

Ask: What payment software or gateways do you use, and what percentage of the route pays via cash or check that isn't recorded until deposit?

Red flag: Trucks with 200,000+ miles carrying un-bolted chemical vats; corroded flatbeds from muriatic acid spills; pole vacuums and hoses dry-rotted and cracked.

Ask: What are the makes, models, mileage, and VINs of all service vehicles included in the sale, and can we perform a third-party mechanical inspection to check frame corrosion from chemical exposure?

Red flag: A 'head technician' who has personal relationships with every customer but lacks a Certified Pool Operator (CPO) license and is a 1099 contractor, not a W-2 employee, making them easy to poach or lose.

Ask: Are all technicians W-2 employees with signed non-solicitation agreements, and will you terminate your own employment with the business to facilitate an introduction to the staff?

Red flag: A route run entirely on paper tickets or the owner's personal memory, with no digitized stop logs, chemical readings, or before/after photos.

Ask: What software platform (e.g., Skimmer, PoolBrain, Jobber) is used to track stops, chemical logs, and billing, and can I see the last 30 days of GPS-verified check-ins?

Red flag: A garage or shed packed floor-to-ceiling with yellowing, outdated trichlor tabs absorbing moisture, creating a massive fire hazard and denaturing the active chlorine.

Ask: Where is bulk chemical inventory stored, is it climate-controlled and complaint with local fire codes, and what is the FIFO (First-In-First-Out) inventory valuation?

Red flag: Revenue drops by more than 50% in the off-season months (Oct–Mar in Sun Belt states), and the seller's 'winter route' consists of raking leaves rather than maintaining chemical balance.

Ask: What is the monthly recurring revenue floor during the slowest month of the year, and what percentage of customers keep their weekly service running through the winter?

Red flag: The seller relies on third-party subcontractors for all pump/motor and plumbing repairs, capping the business's margin upside at just the service chemical fee.

Ask: Does the business generate profit from equipment repairs (pumps, filters, automation) in-house, or is this revenue stream solely a referral conduit for outside plumbers/electricians with no markup?

Red flag: The business operates in a fully mature grid with no new construction or empty lots; every pool in the territory is already assigned to a competitor, making organic growth impossible.

Ask: How many new pool permits were issued in the core operating zip codes in the last 12 months, and what is your current market share of those new builds?

Red flag: A 3.5-star Google rating with comments about recurring algae blooms and missed stops, indicating the seller is selling a negative brand asset rather than a goodwill asset.

Ask: What is the average Google My Business rating, and can you provide screenshots of the five most recent negative reviews and the resolution?

Red flag: The business operates under the seller's personally held pool contractor license (C-53 or similar state equivalent), which cannot be sold or transferred; the buyer must qualify for their own.

Ask: Is the business's qualifying party license held personally by you, and do I need to sit for the state contractor's exam and secure a bond before closing?

Red flag: No signed, evergreen service agreements exist; customers believe they can cancel at any moment with zero notice, making the $X multiple you paid vanish.

Ask: What percentage of active customers have signed a written service agreement, and do those agreements include language that binds the client to the 'successors and assigns' of the company?

Red flag: Technicians routinely discharge filter backwash water (containing DE powder or high copper/algaecide content) directly into storm drains in violation of the Clean Water Act.

Ask: What is the standard operating procedure for disposing of filter backwash and acid wash wastewater, and have you ever had a local water authority compliance notice?

Red flag: The chemical storage yard and truck parking is on a handshake month-to-month lease with a landlord who is not open to a new tenant.

Ask: Is the commercial parking/storage facility lease assignable with a minimum 3-year term extension, or is it tied to your personal residence?

Red flag: The seller wants to cash out and move to Costa Rica within 48 hours of closing, leaving no warm introduction to the homeowner base.

Ask: Are you willing to ride along on the route for a minimum of 4 weeks (8 weeks preferred) post-close to personally introduce me as the 'new owner who maintains the same high standards'?

Red flag: The lead technician discloses during a 'silent interview' that they plan to quit the week the deal closes and start their own route with their side-gig pool accounts.

Ask: What retention bonuses or incentive structures are currently in place for the top technician, and will you agree to a clawback of the sale price if they leave within 90 days?

Red flag: Handwritten scribbles with no discernible pattern, showing wildly fluctuating pH and alkalinity levels, creating a risk of liability for plaster damage immediately upon transfer.

Ask: Can I photograph and review the last 90 days of water chemistry logs (using apps like Pool Brain or Skimmer) for a random sample of 20 pools to ensure they haven't been visually 'blowing and going' without testing?

Red flag: The seller refuses to release the primary business phone number listed on the wrapped trucks because it's 'also their personal cell phone number.'

Ask: Is the main customer-facing phone number, website domain, and Google Business Profile fully owned by the LLC and freely transferable, or is it intermingled with your personal Gmail account?