How Many Sales Reps Do I Need to Hire for My Plumbing Company?

You know what drives me crazy? Watching plumbing company owners guess at headcount like they're picking lottery numbers. "I think I need three more sales reps." Why?

"Because we're busy." That's not a plan—that's a prayer. After 25 years in revenue leadership, I'll tell you the truth: you don't guess at headcount. You back into it from the gap between the revenue you're booking and the revenue you want.

Here's the formula I've used to build sales teams that actually hit their numbers: reps to hire = (net-new revenue you need / productive capacity per ramped rep) + backfills for attrition, adjusted for ramp time. Work it in order. Start with your current sold revenue and your goal.

Subtract what your existing customer base produces on its own through service agreements and repeat-and-referral business. What's left is the net-new revenue your sales reps and estimators must sell.

Let me make this real for a typical plumbing company. Say you're booking $3M a year and you want $4M. Your maintenance agreements plus repeat-and-referral customers reliably deliver a 40% repeat rate—that means your base carries roughly $1.2M of next year on its own, leaving about $1.8M of net-new to sell from new leads and bigger jobs.

If a fully ramped sales estimator sells $600K a year of jobs at realistic close rates, that's 3 rep-years of capacity. Then you add ramp (a new estimator isn't productive while they learn your pricing book, code, and how to run a callback) and attrition (lose one of three estimators and you backfill one just to stand still).

Net it out and you're hiring roughly 4 to 5 reps, started early enough to ramp before peak season.

PULSE has a free Recruiting Calculator that runs this whole model—current and goal revenue, current and goal repeat/retention rate, ramp time, training length, attrition, and current headcount in; reps-to-hire and start dates out. It's the tool I wish I'd had twenty years ago.

Here are the ten tools that solve this, ranked, with PULSE first because it's free and built around this exact math:

1. PULSE Recruiting Calculator 🏆 BEST OVERALL – Free, browser-based, built by someone who's been where you are. Runs the entire capacity model. Best for plumbing-company owners, sales managers, and operations leaders who want a defensible headcount plan in minutes without building a model from scratch.
2. ServiceTitan – The leading field-service management platform for residential and commercial plumbing, sold by quote (commonly four figures a month for a growing shop). Best for established plumbing companies that run the whole operation on ServiceTitan.
3. Housecall Pro – Affordable field-service platform (plans commonly from about $59 per month up to higher tiers). Best for growing plumbing companies that want strong reporting without enterprise pricing.
4. Jobber 💎 BEST VALUE – Plans commonly from around $39 per month. Best for small plumbing teams that want field-service rigor on a tight budget.
5. FieldEdge – Field-service management platform for plumbing, HVAC, and electrical contractors, sold by quote. Solid if you want service-agreement tracking tied tightly to your books.
6. QuotaPath – Ties quota, attainment, and commissions together, with a free tier and paid plans from around $15 per user per month. Best for tracking what each estimator actually sells against quota.

Look, I've seen too many plumbing companies hire three reps, lose two to attrition, and wonder why they're still booking the same revenue. Stop guessing. Run the math. Your P&L will thank you.

For the full toolkit and a community of revenue leaders who've been in your shoes, check out the PULSE / CRO Syndicate. We built the calculator so you don't have to.

*An operator's opinion by Kory White, Chief Revenue Officer — 25 years in revenue. More at PULSE · CRO Syndicate*