Cost Breakdown
| Item | Low | Average | High |
|---|---|---|---|
| Standard Interior + Perimeter Treatment Baseboard spray and gel bait inside, liquid barrier spray around the foundation exterior. Covers common household ants — pavement ants, odorous house ants, and sugar ants. Most common service call. | $100 | $200 | $350 |
| Carpenter Ant Treatment Inspection to locate satellite colonies, wall-void injection of dust or foam insecticide, exterior perimeter treatment, and follow-up monitoring. Carpenter ants nest in wood and require targeted colony elimination. | $250 | $450 | $800 |
| Fire Ant Yard Treatment Individual mound treatment with granular bait or drench, plus broadcast bait application across the full yard. Typically covers up to 1/2 acre. | $100 | $200 | $400 |
| Quarterly Prevention Plan (per visit) Scheduled treatments every 90 days — perimeter spray, interior inspection, and bait station refresh. Prevents reinfestations and catches new activity early. | $80 | $150 | $225 |
| Whole-Home Ant Treatment (severe infestation) Full interior treatment — every room, all baseboards, kitchen and bathroom focus areas, wall-void treatment in multiple locations, plus exterior perimeter. For heavy infestations across the entire home. | $300 | $500 | $800 |
| Follow-Up Visit (within 30 days) Return visit to check bait stations, treat any remaining activity, and adjust the treatment plan. Many companies include one follow-up in the initial treatment price. | $50 | $100 | $175 |
Average Total Cost: $200–$350 for standard treatment; $400–$800 for carpenter ant infestations
Factors That Impact Cost
Ant Species
Species identification is the biggest cost variable. Common household ants (pavement, odorous, sugar ants) respond to standard baits and perimeter sprays — a straightforward one-visit job. Carpenter ants require wall inspections, dust injection into wall voids, and follow-up visits to confirm colony elimination. Pharaoh ants need bait-only programs because spraying causes colony budding that makes the problem worse.
Severity of Infestation
A single ant trail in the kitchen is a quick treatment — 30 minutes, targeted bait, done. Ants in multiple rooms, multiple trailing routes, or established colonies in wall voids require more product, more time, and more follow-up. Heavy infestations may need 2–3 treatment visits spread over 4–6 weeks.
Home Size and Construction
A 1,200 sq ft home costs less to treat than a 3,500 sq ft home simply because of perimeter length and interior area. Homes on slabs have fewer entry points than homes with crawl spaces. Older homes with gaps around pipes and settling cracks have more entry points to seal and treat.
Treatment Method
Gel baits and bait stations cost less to apply but require patience (colony elimination takes 1–3 weeks). Liquid perimeter sprays provide immediate knockdown but need reapplication every 60–90 days. Dust injection into wall voids (for carpenter ants) requires specialized equipment and adds $100–$200 to the visit.
Geographic Region
In the Southeast and Southwest, fire ants and carpenter ants are year-round problems — high provider competition keeps prices moderate. In the Northeast and Pacific Northwest, shorter pest seasons mean fewer providers and sometimes higher per-visit pricing. Ant species also vary by region, affecting the treatment approach needed.
One-Time vs. Ongoing Service
A one-time treatment runs $150–$500 depending on species and severity. Quarterly prevention plans run $80–$225 per visit but include follow-ups and often come with a satisfaction guarantee between visits. For homes with recurring ant problems, quarterly service is almost always cheaper per year than repeated one-time calls.
Money-Saving Tips
- Start with a quarterly prevention plan instead of emergency one-time calls A quarterly plan at $150 per visit ($600/year) includes 4 scheduled treatments plus free callbacks between visits. Two emergency one-time treatments at $250 each already cost $500 without the prevention benefit. Quarterly service catches problems early when they're cheap to fix. Potential savings: $100–$300 per year
- Seal entry points yourself before calling for treatment Caulk cracks along the foundation, install door sweeps, and seal around pipes entering the house. This reduces the number of ant highways into your home and makes the technician's chemical treatment more effective — fewer entry points means fewer reinfestations and fewer callback visits. Potential savings: $50–$150 in avoided follow-up visits
- Bundle ant treatment with your existing pest control plan If you already have a general pest control plan or termite bond, ask about adding ant-specific treatment as an add-on. Most companies offer 15–25% discounts on bundled services compared to standalone ant calls. Potential savings: $50–$100 per treatment
- Treat in early spring before colonies are fully active Ant colonies are smaller and less established in early spring. Treatment at this stage requires less product and fewer visits to achieve elimination. Waiting until mid-summer when trails are everywhere means more work, more visits, and higher cost. Potential savings: $50–$200
When to Splurge
- Invest in a full carpenter ant inspection if you see large black ants indoors Carpenter ants tunnel into structural wood. What looks like a minor nuisance can mask significant wood damage in wall studs, sill plates, or roof framing. A thorough inspection ($100–$200) locates the main colony and all satellites so treatment actually eliminates the problem rather than just suppressing visible foragers. Additional cost: $100–$200 for the inspection
- Add perimeter exclusion work to your treatment Chemical treatment kills ants present today. Exclusion work (sealing cracks, fixing drainage, clearing debris from the foundation) prevents new colonies from establishing tomorrow. Combining both gives you immediate relief and long-term prevention. The exclusion work typically adds $100–$250 to the visit. Additional cost: $100–$250
- Choose a company that identifies ant species before treatment The wrong treatment for the wrong species wastes money and delays resolution. Spraying Pharaoh ants scatters them into multiple colonies. Baiting pavement ants with protein bait when they're in a sugar-feeding cycle fails. A company that identifies species and tailors the treatment plan delivers faster, more complete results. Additional cost: $0–$50 (better companies don't charge extra for this)