Grease trap cleaning cost comes down to trap size, how often you service it, and access. This guide explains what drives the price in 2026 and three practical ways to lower it — including using your used cooking oil rebate to offset the bill.
How much does grease trap cleaning cost?
Anyone who quotes a single flat price for "a grease trap" without asking about your equipment is guessing. The honest answer is that a few variables drive the number, and you can influence most of them.
What drives the price
- Size and type. A 40-pound under-sink trap holds a fraction of what a 1,500-gallon in-ground interceptor does. Bigger units cost more per visit but are cleaned less often.
- Frequency. Scheduled service is cheaper per visit than emergency dispatch. Letting a trap go until it backs up is the most expensive way to run it.
- Access. An easy-to-reach trap is faster to service than one buried under a parking lot or behind equipment.
- Line jetting. If the line has already clogged, clearing it adds to the job — another reason to stay ahead of the 25% threshold.
How to lower your grease trap cost
Three levers actually move the number: get on a regular schedule sized to your fill rate (so you never pay emergency rates), keep food solids and oil out of the drain (which stretches the interval), and put your trap and your fryer oil on one vendor so you're not paying two separate trip charges. For most kitchens the third is the biggest single saving.
The used-cooking-oil offset
Here's the part most restaurants miss: your fryer oil has value. GreaseGiant pays you market rates for clean used cooking oil, and when both services share one account, that rebate offsets part of your grease trap bill. Two waste problems, one invoice, and a credit working in your favor.
Frequently asked questions
How much does it cost to pump a grease trap?
It depends mostly on size and frequency. A small indoor trap costs far less per visit than a large outdoor interceptor, and a trap on a regular schedule is cheaper per visit than an emergency call-out. The most reliable way to lower the cost is regular service plus bundling with used cooking oil pickup.
Why is my grease trap cleaning so expensive?
Usually one of three reasons: the trap is oversized or hard to access, it's only cleaned in emergencies (which costs more than scheduled service), or you're paying a separate vendor a trip charge on top of your used-cooking-oil hauler. Consolidating both with one company removes the duplicate trip charge.
Can used cooking oil offset grease trap costs?
Yes. Because clean fryer oil is a commodity GreaseGiant pays you for, that rebate can offset part — sometimes all — of your grease trap cleaning cost when both are on one account.