How to Get Rid of Ants (Bait, Don't Spray)

Get close and look at size, color, and behavior. The three species that matter most in US homes:

A pavement ant (dark, trails on driveways and slabs) behaves like an odorous house ant for treatment purposes — bait it. If you're seeing winged "ants" swarming from walls in spring, stop and rule out termites first: termites have straight antennae, equal-length wings, and thick waists. See our termite guide before treating anything.

Workers you see are a tiny fraction of the colony, and killing them changes nothing — the queen keeps producing. Bait works because foragers carry a slow-acting poison back and feed it to the queen and brood, collapsing the colony at the source.

Repellent sprays actively backfire on some species. Odorous house ants respond to spray stress by "budding" — splitting one colony into several, each with its own queens. That's how a manageable trail becomes an infestation across three rooms. If a product's label brags about killing "on contact," it's the wrong tool for an ant problem.

1. Follow the trail. Track ants backward from the food source to where they enter — a window frame, an outlet, a slab crack. Note it; don't seal it yet.
2. Remove the buffet. Wipe counters with soapy water (this also erases the trail pheromone), fix dripping taps, get pet food off the floor overnight, and move fruit into the fridge for two weeks.
3. Place bait directly on the trail. Use a sweet liquid or gel bait station where you saw the heaviest traffic. Put out more stations than feels necessary — several small placements beat one big one.
4. Offer two food types. Colonies switch appetites between sugars and protein through the season. If sweet bait gets ignored within 48 hours, add a protein/grease bait alongside it.
5. Do not spray anything. Killing the workers at the bait interrupts delivery to the queen. Expect more ants at the bait for a few days — that's the plan working.
6. Treat the exterior with a non-repellent. Once indoor baiting is underway, apply a non-repellent perimeter treatment (fipronil-type products) around the foundation. Ants can't detect it, walk through it, and spread it in the nest.
7. Wait 1–2 weeks, then seal. After the trail dies, caulk the entry points and keep one bait station down as a monitor.

Most common ant problems resolve within two weeks on this protocol for $20–$50 in products.

If it's carpenter ants

Carpenter ants don't eat wood — they hollow it out to nest, almost always in wood that's damp. That makes them a two-part problem: kill the colony and fix the moisture (leaky roofline, gutter overflow, bathroom fan venting into the attic). Baiting works but is slower and less reliable than with sugar ants; locating the nest (listen at night for rustling, look for frass piles) and treating the galleries directly is the high-percentage play. If the nest is inside a wall void or you can't find it within a week, bring in a pro — the risk here is structural, and this is the one common ant where professional help is frequently worth the ~$250.

If it's fire ants

Use the two-step method that Southern extension services have validated for decades: broadcast a granular fire ant bait across the whole yard (spring and fall), then treat individual problem mounds with a drench or mound bait a few days later. Kicking mounds or pouring home remedies on them just makes colonies move a few feet over.

Buy:

• Sweet liquid/gel baits (borax or thiamethoxam-based) — the workhorse for kitchen ants
• Protein/granular baits — for when sweet gets ignored, and for fire ants outdoors
• Non-repellent perimeter concentrates (fipronil-type) — invisible to ants, colony-spread effect

Skip:

• Repellent aerosols — kills scouts, triggers budding, contaminates bait placements
• Vinegar as a "killer" — wipes the scent trail, kills nothing (fine as a cleaner)
• Chalk, cinnamon, coffee-ground barriers — ants walk around them

Ant colonies re-invade along the same highways, so spend twenty minutes closing them. Keep a 6–12 inch dry, plant-free strip against the foundation — mulch piled on siding is an ant bridge, and so is any branch or shrub touching the house, so trim them back. Fix the exterior moisture that carpenter ants need: clean gutters, redirect AC drip lines, ventilate crawl spaces. Store firewood off the ground and away from walls. Indoors, leave one bait station down as an early-warning monitor. In the South, re-apply the exterior non-repellent perimeter each spring — pressure restarts by March, and beating the first scouts is far easier than beating an established trail.

Call a professional if: carpenter ants persist or you find structural damage; fire ants are at a scale that threatens kids or pets; or two correct rounds of baiting (right species, right bait, two weeks each) have failed. Professional ant treatment typically runs $200–$300, about $250 per visit, as of July 2026 — and for carpenter ants that includes the nest-location work that's the hard part. Compare that honestly against your time and the damage risk; our DIY vs pro framework walks through the math.

Expect ant pressure to spike in April–May as colonies emerge and forage hard — see the seasonal calendar for what's coming next.