How to Get Rid of Ants (Indoors and Out)

Quick answer: To get rid of ants, identify the species, wipe out their scent trails with soapy water, then set ant bait so workers carry poison back to the colony instead of spraying the ones you see. Seal entry points, fix moisture, and store food sealed. Most kitchen ant problems clear in one to two weeks; carpenter ants and recurring colonies usually need a pro.

Ants march into homes for two simple reasons: food and water. A handful of scouts find a crumb or a leak, lay down a chemical trail, and within hours a column of workers is following it straight to your kitchen. That is why ants feel relentless, and also why the instinct to grab a spray backfires. Spraying the trail kills the visible workers but leaves the queen and the colony untouched, so a new wave arrives in days. The reliable way to end an ant problem is to think like the colony: break the trail, let workers carry bait home to the queen, and close the doors behind them.

This guide covers the full playbook, indoors and out, including how to tell ordinary nuisance ants from carpenter ants that damage wood and need professional help.

Step 1: Identify the ant you are dealing with

Species matters more than people expect. Some ants want sweets, others want grease or protein, and the right bait depends on which. A few species also call for a completely different strategy.

Odorous house ants

Tiny, dark brown, and famous for a rotten-coconut smell when crushed. They love sweets and are one of the most common kitchen invaders. They nest in wall voids, under floors, and outdoors near foundations, and respond very well to sweet liquid bait.

Argentine ants

Light to dark brown, forming huge trails and supercolonies, especially in warm regions. Because their colonies have many queens and connect across yards, they are persistent and usually need sustained baiting and exterior treatment, not a one-time effort.

Pavement ants

Dark, found nesting under sidewalks, driveways, and slab foundations, often pushing up small piles of soil. They eat almost anything and are manageable with bait and exterior perimeter work.

Carpenter ants

Large, often black, up to half an inch. These do not eat wood like termites, but they tunnel through it to nest, which can weaken structures over time. Signs include piles of sawdust-like shavings (frass), faint rustling in walls, and large winged swarmers indoors. Carpenter ants usually mean a moisture or wood-decay problem and are the species most likely to need a professional.

Fire ants

Reddish, aggressive, and known for painful stings. They build dome mounds in yards across the southern U.S. Treat mounds with bait and avoid disturbing them; heavy yard infestations are worth a pro for safety.

Step 2: Erase the scent trail

Ants navigate by pheromone trails their scouts leave behind. If you only wipe with a regular cleaner, you may leave enough scent for the column to find its way back. Clean entry paths and counters with soapy water or a vinegar-water solution to disrupt the chemical signal. Do this after baiting, not before placing bait, because you want active trails to lead workers to the bait first.

Step 3: Bait the colony, do not spray it

This is the step that actually solves the problem. Ant bait is slow-acting on purpose: workers carry it back and feed it to the queen and larvae, which collapses the colony from the inside. If you spray and kill workers too fast, the poison never reaches the queen and the colony simply replaces them.

How to bait correctly

• Place bait stations directly on active trails and near entry points, not in random corners.
• Match the bait to the ants: sweet (sugar-based) bait for sweet-feeders, protein or grease-based bait if they ignore sweets.
• Resist the urge to clean up the trail or kill the workers feeding on bait, you want them carrying it home.
• Leave bait in place for one to two weeks; expect activity to briefly increase before it drops as recruitment peaks.
• If ants ignore one bait, switch the type, their food preference shifts seasonally between sweets and protein.

Seeing more ants right after you set bait is normal and a good sign. It means workers found it and are recruiting others to carry it back to the queen. Do not spray them or clean up the trail while bait is working.

Step 4: Seal, dry, and store

Once the colony is collapsing, deny new scouts a reason and a route to return. Exclusion and sanitation are what keep the problem from repeating.

• Caulk gaps around windows, doors, baseboards, and where pipes or wires enter the home.
• Add or repair door sweeps and weatherstripping on exterior doors.
• Fix leaks and wipe up standing water; many ants come indoors hunting moisture during dry or hot spells.
• Store sweet and greasy foods, including pet food, in sealed containers, and clean up crumbs and spills promptly.
• Take out trash regularly and rinse recyclables.

Step 5: Treat the outside

Most ant colonies live outdoors and forage in. Treating only the kitchen treats the symptom. Walk the perimeter and reduce the conditions that bring ants to the foundation.

• Trim shrubs, tree limbs, and mulch back from the foundation; branches touching the house act as bridges.
• Keep firewood, lumber, and debris away from the structure, a favorite carpenter ant harborage.
• Clear gutters and direct downspouts away from the foundation to reduce moisture.
• Place exterior bait stations along trails and near nest entrances you can find in the yard.

DIY vs professional ant control

Nuisance ants in the kitchen, odorous house ants, pavement ants, and most Argentine ant trails, are usually a DIY win with the right bait and a little patience. The picture changes with carpenter ants (structural risk), fire ants (sting risk), large multi-queen supercolonies, or ants that keep returning despite weeks of baiting.

Curious what professional treatment costs in your area? See our pest control cost guide for 2026. Pricing depends on the species, the size of the colony, and whether structural work is involved.

How to keep ants from coming back

Prevention is the same set of habits that ended the infestation, kept up year round. Ants are opportunists; remove the opportunity and they move on.

• Keep counters, floors, and sinks clean and dry, especially overnight.
• Maintain exterior sealing, door sweeps, and a vegetation gap around the foundation.
• Address moisture fast, leaks and damp wood invite carpenter ants in particular.
• Keep a few bait stations available so you can respond the moment scouts reappear.

When to call a professional

Call a pro if you see large black ants with sawdust-like frass, winged swarmers emerging indoors, fire ant mounds in the yard, or ants that return within days no matter how you bait. Carpenter ants in particular signal that you may have a hidden moisture or wood-decay issue that needs to be found and corrected, not just sprayed. A licensed technician can locate the nest, use non-repellent treatments that ants unknowingly carry home, and treat wall voids and exterior harborage you cannot reach.

When you hire, confirm current credentials. PestPin profiles are matched to official license records marked active when processed, and you can see exactly how that works in how PestPin matches pest-control license records. For help comparing quotes, read how to choose a pest control company.

Ready to solve it? Compare ant control companies with source-linked license records near you, browse local pest control providers, and submit a free request that PestPin offers to one eligible provider at a time. Acceptance, contact, and a quote are not guaranteed. If you are facing more than one pest, explore broader pest control services.