How To Price A Septic Job So You Actually Make Money
Septic work isn't one job type — a pump-out, a repair, and a new system install have three genuinely different cost structures, and pricing them all the same way either overprices routine maintenance or underprices a real install.
Pump-out: a flat fee by tank size
A standard pump-out is priced as a flat fee based on tank size, since the job itself doesn't vary much beyond how much needs pumping. A 1,000-gallon tank pump-out, at an illustrative $350:
| Step | Calculation | Result |
|---|---|---|
| Pump-out, 1,000 gal | Flat | $350.00 |
Repair: a base fee plus actual parts cost
A repair covers the trip and diagnosis as a base fee, plus whatever parts the specific repair actually needs — parts cost varies too much job to job to formularize, so it's a direct input per quote. A repair with $180 in parts, at an illustrative $300 base fee:
| Step | Calculation | Result |
|---|---|---|
| Base fee | Flat | $300.00 |
| Parts | Actual cost | +$180.00 |
| Final quote | $300 + $180 | $480.00 |
New system install: base by system type, plus tank size and pass-throughs
A new aerobic system with a 2,000-gallon tank, a required perc test, and a permit, at an illustrative $12,000 aerobic base:
| Step | Calculation | Result |
|---|---|---|
| Aerobic system base | Flat | $12,000.00 |
| Tank size surcharge | 2,000+ gal | +$1,200.00 |
| Perc test | Flat | +$400.00 |
| Permit filing | Flat | +$350.00 |
| Final quote | $12,000 + $1,200 + $400 + $350 | $13,950.00 |
If the client also opts into an annual maintenance plan, that's tracked separately as recurring revenue — at an illustrative $225/year — not folded into the one-time install price.
The rates used above are illustrative, not a claim about what your market should charge. Septic costs vary significantly by region, soil conditions, and local permitting fees — set your own numbers based on your actual market.