Subterranean Termite Treatment Cost in 2026

The native eastern subterranean termite, Reticulitermes flavipes, is the most common wood-destroying insect across the eastern, central, and southern United States. Western subterranean (Reticulitermes hesperus) plays the same role on the Pacific coast. Both species share a single feature that drives down treatment cost: they live in the soil and return to the soil for moisture every day or two. That biology is the whole reason a chemical barrier in the soil controls them so reliably and so cheaply.

The standard liquid product, Termidor SC (active ingredient fipronil, EPA Reg No. 7969-210), is a non-repellent. Foraging workers walk through the treated soil without detecting it, pick up the chemical on their cuticle and in their gut, return to the colony, and transfer it through trophallaxis (mouth to mouth food sharing) and grooming. A trench dug 4 inches deep and 6 inches wide around the foundation, filled with finished Termidor solution at 4 gallons per 10 linear feet per foot of footing depth, becomes a structural perimeter the colony cannot cross more than a handful of times before workers die in cascading numbers.

Sentricon, the dominant baiting system, works on the same colony-transfer principle but with a different chemistry. The active ingredient, noviflumuron (EPA Reg No. 432-1448), is a chitin synthesis inhibitor. Workers cannot molt. The colony loses its replacement worker population over three to six months and collapses. A trained Certified Sentricon Specialist installs 10 to 20 stations around the home (one every 10 linear feet) and returns quarterly to inspect and rebait. The cost premium over liquid covers ongoing labor, not chemical volume.

Two other factors matter for cost. First, the trenching itself is labor-intensive. On a 2,000 sq ft home with a 180 linear foot foundation perimeter, a two-person crew can complete a Termidor SC treatment in 4 to 6 hours. Slab foundations add drilling time: every 12 inches through the slab edge, a 1/2 inch hole, treatment injected, then patched with hydraulic cement. Slab work commonly adds $200 to $500 to the quote. Second, the local market sets the per-foot rate. Per-foot rates aggregated from publicly posted operator quotes run from $3 to $5 in low-cost rural markets to $12 to $18 in coastal Florida, Hawaii, and the San Francisco Bay area.

Bait station systems also charge per linear foot, indirectly. National pricing surveys aggregated by HomeAdvisor and Angi report Sentricon AG installs landing between $1,500 and $3,800 in 2026, with the renewal contract at $300 to $500 a year. That renewal is mandatory for the warranty to remain in force, and the warranty is the whole point of a bait system. A homeowner who drops the contract loses both the recurring chemical replacement and the retreatment guarantee.