Service Agreement Profitability

The 100-point spread that nobody talks about

Across 259 contractors with material SA revenue, gross margin on service agreements ranges from -30% (bottom decile, losing 30 cents on every SA dollar) to +70% (top decile). The median sits at 37.9%. Same trade, same market, often the same customer profile.

That 100-point spread is what makes SAs the highest-leverage line item in a service contractor's P&L. Not because they're the biggest revenue line — they're usually not — but because the gap between doing them well and doing them badly is bigger than for any other revenue category.

Four levers explain the spread: pricing discipline, scope control, customer mix, and cost visibility. No single one dominates, which is exactly why fixing SA margin requires a CFO lens, not just an operational tweak.

Lever 1: pricing discipline

Most contractors price SAs based on what they charged five years ago, plus a small annual bump. They don't model the actual cost of fulfillment — labor hours, parts, vehicle, dispatch — and they don't reprice when costs go up.

Top-quartile contractors do a fully-loaded cost-to-serve calculation per agreement, then add target margin. They reprice annually when wages, fuel, or parts costs move. They walk away from agreements that can't be priced for the target margin.

The reason most contractors don't reprice is fear of attrition. The math says that fear is usually wrong. Even a 20% price increase on SAs typically loses less than 10% of customers. The remaining 90% pay 20% more for the same work. That's pure margin.

Lever 2: scope control (where SAs quietly bleed)

An SA covers a defined scope — typically scheduled maintenance plus minor adjustments. The bleeding happens when techs treat the SA as 'whatever the customer asks for.' Add-on tasks that should be billed separately get rolled in. Diagnostic time on issues outside the SA gets eaten. Free callbacks compound.

The fix is process, not pricing. Every SA visit needs a defined checklist (what's covered) and a quote-on-site mechanism for anything outside it. Techs need to be trained that 'I'm covered for the maintenance, but this repair is separate' is the customer expectation, not an upsell trick.

Contractors who build this discipline see SA margins climb 10–15 points within 90 days. Same agreements, same customers — just stop giving away work that wasn't priced in.

Lever 3: customer mix and the high-maintenance trap

Not all SA customers are equal. A small subset — typically 10–15% of the book — generates 50%+ of the unscheduled callouts, complaints, and scope creep. They're often the ones who pushed hardest for a discount on the agreement and treat the SA as an all-you-can-eat buffet.

Top contractors quietly cull these customers. Not by firing them — that creates noise. By repricing them on renewal at the actual cost-to-serve plus margin. Most leave. The 30% who stay become profitable.

The signal to watch: SA customers whose unscheduled callout rate is more than 2x the book average. Those are the customers killing your margin, and they're hiding in the average.

Lever 4: pull-through — the real profit center

Service agreements aren't supposed to be the profit center. The agreement fee gets you in the door. The pull-through revenue — replacements, repairs, accessory upgrades surfaced during PM visits — is where the real margin lives.

Across 386 contractors, the median annual pull-through ratio is 8.7% (every $1 of SA revenue generates $0.09 of additional work). Top quartile: 30%. The gap on a $500K SA book is $105K/year — from customers you're already visiting.

The trades that pull through best (mechanical: 46%, HVAC: 30%) have techs trained to recommend, on-site quoting tools, and an office process that follows up within 48 hours on any flagged opportunity. The trades that pull through worst (plumbing: 5.5%, electrical: 18%) have the most upside — the baseline is so low that even modest process changes produce outsized gains.

The 90-day fix

• Pull SA-level P&L for the last 12 months. Allocate every PM visit's labor and parts cost to the agreement. Compute gross margin per SA. The bottom 20% is your reprice list.
• Build a checklist for every SA visit type. What's covered, what's not, what triggers an on-site quote. Train techs once and audit weekly.
• Set a 48-hour rule for follow-up on any tech-flagged opportunity. Every visit that surfaces a potential repair or replacement gets called within 2 business days. Most missed pull-through dies in the office, not on-site.
• Run a quarterly customer cull. Top 20% of unscheduled callout offenders get repriced on renewal at cost-to-serve plus 30%. Communicate honestly: 'Your usage profile means we need to reprice.' Most leave. That's fine.
• Track three numbers monthly: SA gross margin, pull-through ratio, and SA renewal rate. The bottom decile contractors don't track any of these. The top decile track all three weekly.