How to Get Rid of Ants: Complete Guide for Homeowners (2026)

Last updated: March 3, 2026

By James — 25-year pest control industry veteran

Figuring out how to get rid of ants is one of the most common pest control challenges homeowners face, especially during spring and summer when colonies are most active. Ants are social insects that live in large colonies, so killing the ones you see on your kitchen counter does very little to solve the underlying problem. Effective ant control requires identifying the species, targeting the colony with the right method, and eliminating the conditions that attracted them in the first place.

This guide covers how to identify the ant species in your home, which DIY methods actually work, why ant colonies are so difficult to eliminate, and when professional treatment is the better option. For detailed pricing information, see our ant exterminator cost guide.

Identifying Common Ant Species

The species of ant in your home determines the level of risk and the most effective treatment approach. Some ants are simple nuisance pests, while others cause structural damage or pose medical concerns. Identifying the species correctly before choosing a treatment method saves time and money.

Carpenter ants

Carpenter ants are among the largest ants found in homes, typically 1/4 to 1/2 inch long and black or dark brown. Unlike termites, carpenter ants do not eat wood. Instead, they excavate galleries inside damp or damaged wood to build their nests. Signs of carpenter ant activity include small piles of sawdust-like frass near baseboards, window frames, or door frames.

Carpenter ants are the most destructive ant species for homeowners because their tunneling weakens structural wood over time. They often nest in wall voids, attic rafters, and areas around plumbing leaks where wood stays moist. If you find carpenter ants, professional treatment is strongly warranted because of the potential for hidden structural damage.

Fire ants

Fire ants are small (1/8 to 1/4 inch), reddish-brown, and aggressive. They build distinctive dome-shaped mounds in yards, often in sunny, open areas like lawns, garden beds, and along sidewalks. Fire ants are most common in the southern United States, from Texas to the Carolinas.

Fire ant stings are painful and produce raised, white-topped pustules that last for days. Some people experience severe allergic reactions (anaphylaxis) to fire ant venom. Because of the medical risk, fire ant colonies in yards where children or pets play should be treated promptly. Individual mound treatments and broadcast baits are the most common approaches.

Odorous house ants

Odorous house ants are tiny (1/16 to 1/8 inch), dark brown to black, and produce a distinctive rotten coconut smell when crushed. They are one of the most common indoor ant species, forming long trails along countertops, baseboards, and windowsills as they forage for sweets and grease.

Odorous house ants are a nuisance pest and do not cause structural damage or bite. However, their colonies can contain tens of thousands of workers and multiple queens, making them persistent invaders. They nest both indoors (in wall voids, under floors) and outdoors (under rocks, mulch, and pavement).

Pavement ants

Pavement ants are small (1/8 inch), dark brown to black, and commonly nest in cracks in sidewalks, driveways, patios, and building foundations. Small mounds of displaced soil near pavement cracks are a telltale sign of pavement ant nests. They forage indoors for sweets, grease, and crumbs, especially on ground-floor levels.

Pavement ants are generally considered a low-risk nuisance pest. They rarely nest inside the home itself, which means sealing entry points and baiting along their trails is usually sufficient to control them.

Pharaoh ants

Pharaoh ants are very small (1/16 inch), pale yellow to light brown, and notoriously difficult to eliminate. They thrive indoors in warm, humid environments and are common in hospitals, commercial kitchens, and apartment buildings. Pharaoh ants nest in hidden, hard-to-reach areas like wall voids, behind baseboards, and inside electrical outlets.

What makes pharaoh ants especially challenging is their response to stress. When a colony is disturbed by spraying or other repellent treatments, it splits into multiple new colonies through a process called budding. Using the wrong treatment can turn one colony into several, making the problem significantly worse. Bait is the only recommended approach for pharaoh ants.

DIY Methods That Work

The most effective DIY ant control combines targeted baiting with sanitation and exclusion. Unlike sprays that only kill foraging ants on contact, baits work by exploiting the colony structure, using the ants' own food-sharing behavior to deliver poison to the queen and the rest of the colony.

Bait stations (most effective DIY method)

Commercial ant bait stations are the single most effective DIY option for most ant species. They contain a slow-acting poison mixed with an attractive food source. Worker ants carry the bait back to the nest and share it with other workers, larvae, and the queen through a process called trophallaxis. Over one to two weeks, the poison spreads through the colony and kills it from the inside out.

Place bait stations directly along active ant trails, near entry points, and close to areas where you see the most activity. Do not spray insecticide near the bait stations, as repellent sprays deter ants from approaching the bait. It is important to be patient; baiting takes time because the poison must work through the entire colony before visible ant activity stops.

Borax and sugar bait (homemade recipe)

A simple homemade ant bait can be made by mixing 1/2 cup of sugar, 1.5 tablespoons of borax, and 1.5 cups of warm water. Soak cotton balls in the solution and place them on small pieces of wax paper or in shallow containers along ant trails. The sugar attracts foraging ants, and the borax acts as a slow-acting stomach poison.

This bait works best for sugar-feeding species like odorous house ants and pavement ants. For grease-feeding ants, mix borax with peanut butter instead. Replace the bait every two to three days to keep it fresh. Keep borax bait away from children and pets, as borax is toxic if ingested in large quantities.

Diatomaceous earth

Food-grade diatomaceous earth (DE) is a fine powder made from fossilized algae that damages the waxy outer coating on ant exoskeletons, causing them to dehydrate and die over several days. Apply a thin, barely visible layer in dry areas where ants travel, such as along baseboards, behind appliances, inside cabinets, and around entry points.

DE works best as a supplemental barrier rather than a primary treatment. It loses effectiveness when wet and does not target the colony the way baits do. However, it is a useful tool for treating cracks and crevices where ants enter the home.

Sealing entry points

Ants can enter your home through incredibly small gaps, including cracks in the foundation, gaps around windows and doors, spaces where pipes and utility lines penetrate walls, and openings around electrical outlets. Sealing these entry points is a critical step that prevents new ants from entering even after you have addressed the current colony.

Use silicone caulk to seal small cracks along baseboards, around window frames, and where pipes pass through walls. Apply weatherstripping to doors and windows that do not seal tightly. Check for gaps where the foundation meets the siding and around outdoor faucets and dryer vents.

Cleaning and sanitation

Removing food sources is essential for making bait stations more effective and less competition for the ants' attention. Wipe down countertops and stovetops daily. Sweep or vacuum floors regularly, paying special attention to areas under the refrigerator, stove, and dining table. Store all food in sealed containers, including pet food and fruit.

Clean up spills immediately, especially sugary liquids and grease. Rinse recyclable cans and bottles before storing them. Take out the trash every evening and use trash cans with tight-fitting lids. Even small crumbs can sustain an ant colony, so thorough cleaning removes the incentive for ants to forage in your home.

Why Ant Colonies Are Hard to Eliminate

Ants are among the most socially organized insects on Earth, and their colony structure makes them remarkably resilient to most pest control methods. Understanding why ants are so persistent helps explain why baiting is more effective than spraying.

The queen system

Every ant colony revolves around one or more queens whose sole purpose is reproduction. The queen stays deep inside the nest, protected by thousands of workers, and never forages for food herself. Killing the worker ants you see on your countertop does nothing to stop the queen from producing replacement workers. A colony cannot be eliminated until the queen is killed, which is why bait (carried back to the nest by workers) is far more effective than contact sprays.

Satellite colonies

Many ant species, including carpenter ants and odorous house ants, establish satellite colonies in addition to their main nest. A single carpenter ant colony may have a parent nest outdoors in a tree stump and two or three satellite nests inside your walls. Treating only the visible trail may address one satellite colony while leaving others untouched. A thorough approach requires locating and treating all nest sites.

Budding behavior

Certain species, particularly pharaoh ants and Argentine ants, respond to threats by splitting their colony into multiple new colonies in a process called budding. When a colony is disturbed by repellent sprays, vibrations, or other stressors, one or more queens leave with a group of workers and brood to establish a new nest nearby. This means that spraying the wrong product can literally multiply the number of colonies in your home. Bait is the only safe approach for species that exhibit budding behavior.

When DIY Fails and You Need a Professional

DIY baiting and prevention work well for most common ant species in mild to moderate infestations. However, certain situations call for professional treatment because of the risks involved or the difficulty of reaching the colony. For help deciding, see our guide on when to call an exterminator.

Carpenter ants (structural risk)

Carpenter ants tunnel through structural wood and can cause significant damage over time, especially in areas with moisture problems. Because their nests are often hidden inside wall voids, attic framing, or behind siding, locating and treating all nest sites requires professional inspection and specialized tools. Delaying treatment allows the damage to worsen.

Fire ants (medical risk)

Fire ant colonies can contain hundreds of thousands of workers and are extremely aggressive when disturbed. DIY mound treatments sometimes scatter ants to new locations in the yard rather than eliminating the colony. Professional yard treatments using broadcast bait and targeted mound drenches are more thorough, especially for properties with multiple mounds.

Persistent re-infestation

If ants return within a few weeks after DIY treatment, the colony was likely not fully eliminated. This is common when nests are located in hard-to-reach areas such as inside walls, under concrete slabs, or in crawl spaces. A pest control professional can perform a more thorough inspection to locate the source and apply commercial-grade products.

Large colony networks

Some ant species form supercolonies with multiple queens and interconnected nests spanning large areas. Argentine ants, for example, can establish colony networks across an entire neighborhood. When a problem extends beyond a single home, coordinated professional treatment may be the only realistic solution.

Professional Treatment Options

Professional pest control companies use a range of methods depending on the ant species, colony location, and severity of the infestation. Here is an overview of common professional treatments and their typical costs. For a detailed cost breakdown, visit our ant exterminator cost guide.

Most professional treatments include at least one follow-up visit to verify that the colony has been eliminated and to reapply if needed. Many companies also offer ongoing quarterly or monthly plans that provide perimeter treatments to prevent re-infestation.

Prevention Tips

Preventing an ant infestation is far easier than eliminating an established colony. These steps address the food, water, and access points that draw ants into your home.

• Seal entry points. Caulk cracks along the foundation, around window frames, and where pipes and wires enter the home. Replace worn weatherstripping on doors and check garage door seals for gaps.
• Store food properly. Keep sugar, honey, cereal, and other pantry staples in sealed airtight containers. Do not leave fruit on the counter overnight, and store pet food in sealed bins.
• Fix moisture issues. Repair leaky faucets, pipes, and drains promptly. Ants, especially carpenter ants, are attracted to damp wood and standing water. Ensure proper drainage around the foundation.
• Trim vegetation away from the house. Keep shrubs, tree branches, and other vegetation at least 12 to 18 inches from exterior walls. Branches and plants that touch the house provide a direct bridge for ants to enter.
• Clean up crumbs and spills. Wipe counters, sweep floors, and clean under appliances regularly. Even tiny food residues are enough to attract foraging scout ants, which then recruit the rest of the colony.
• Move firewood and debris away from the foundation. Store firewood at least 20 feet from the house and elevate it off the ground. Mulch, leaf litter, and landscape timbers near the foundation provide nesting habitat for many ant species.

For a broader look at pest control pricing and service options, visit our pest control cost guide.

Frequently Asked Questions