How to Get Rid of Termites: DIY vs Professional

Every homeowner’s first instinct is the hardware store. Sometimes that instinct is right — a single drywood kick-out hole in a windowsill is a legitimate spot-treatment candidate. Usually it is not, because the visible damage is a fraction of the colony behind it.

This guide draws the honest line between DIY and professional work: which methods exist on each side, what they cost, and the specific situations where each makes sense. Start with the signs of termites to size the problem before spending anything.

Step 1: Identify What You’re Dealing With

The right way to get rid of termites depends entirely on the species — this is not optional homework, it decides everything downstream.

• Subterranean termites (including aggressive Formosan termites) live in the soil and enter through mud tubes. They make up the large majority of US infestations. Killing them means treating soil or baiting the colony — surface sprays accomplish nothing.
• Drywood termites live entirely inside the wood they eat — no soil contact. Small, contained infestations in accessible lumber are the one category where DIY has a real chance. Widespread drywood activity calls for fumigation or heat.
• Dampwood termites infest wet, decaying wood. Fix the moisture source and replace the wood, and you have largely solved the problem.

If you are not sure which species you have, see the guide to types of termites or get a professional identification — most companies offer a free or low-cost inspection (what an inspection costs and includes).

What Kills Termites Instantly?

The honest answer splits in two. The termites you can see are easy to kill on contact: orange oil (d-limonene) injected into a gallery, boric acid dust, or a household insecticide spray all kill exposed termites within minutes to hours. The colony is a different problem — nothing kills it instantly. The fastest professional option, whole-structure fumigation, takes 2–3 days of tenting. Liquid soil treatments kill within days as termites cross the barrier. Bait systems take 1–3 months, because workers have to carry the active ingredient back to the nest before the colony collapses.

This is why “instant” is the wrong target. The swarmers or workers in front of you are a rounding error — a subterranean colony numbers in the hundreds of thousands and sits in soil or inside walls where no contact spray reaches. Worse, spraying a mud tube or a swarm scatters the survivors and makes the inspector’s job harder. Kill what you see if it makes you feel better, but plan around the colony: the methods below are what actually ends an infestation.

What DIY Can Realistically Handle

DIY methods have one legitimate niche: small, confirmed, accessible drywood or dampwood problems. Here is what actually exists on the store shelf and what each is good for.

Orange oil and spot treatments

Orange oil termite treatment (d-limonene) kills on direct contact when injected into infested wood. It is a real product with a real limitation: it only reaches the gallery you inject, and it leaves no residual protection. It makes sense for a single kick-out hole in furniture, a windowsill or an exposed beam — not for structural framing you cannot fully access. Professional spot treatments use the same logic with stronger, longer-lasting injectables.

Boric acid

DIY termite treatment with boric acid works as a dust or solution applied to wood — it poisons termites that groom or eat treated material. It is useful as a preventive on new or exposed wood and as a knockdown on small accessible spots. It will not touch a soil colony under your slab, and applying it safely around the house requires care around children and pets.

Store-bought bait stakes

Retail bait stakes can intercept foraging termites and are a reasonable early-warning tool. As a treatment they underperform professional bait station systems, which use more stations, tighter spacing and scheduled monitoring by a technician. Think of store baits as a tripwire, not an extermination plan.

What DIY cannot do

• Inject termiticide into soil at the volumes and pressures a liquid barrier requires
• Legally buy restricted-use termiticides in most states
• Reach colonies inside walls, under slabs or in crawl spaces without drilling equipment
• Verify elimination — you cannot monitor what you cannot see

When You Need a Professional, Full Stop

Skip the DIY aisle and call a licensed company if any of these apply:

• You found mud tubes on foundation walls, piers or slabs — that means subterranean termites and a soil colony
• Swarmers or discarded wings indoors — an established colony is reproducing inside or under the structure
• Damage in multiple rooms or structural members (joists, sills, studs)
• The home has a history of termites, or you are in a high-pressure region — species and risk vary by state, and our state termite guides break down what you face where you live
• You are selling or buying — lenders typically require a documented treatment and a clean termite letter (WDIR)

Professional Treatment Methods and What They Cost

Professionals choose from four main methods, matched to species and spread. Typical US price ranges:

Overall, most US homes pay $225 to $2,500 per treatment; whole-structure tenting is the outlier at the top of the range. For a deeper breakdown by method and species, see the termite treatment cost guide, and for how each method works see termite treatment options. The two most common subterranean methods go head to head in bait stations vs liquid treatment, and tenting logistics are covered in termite fumigation.

DIY vs Professional at a Glance

How to Choose a Company Without Getting Sold

1. Get 2–3 written quotes. A legitimate inspection is free or $75–$250 and ends with a written treatment plan naming the species, method and linear footage — not just a price.
2. Verify the license. Termite work requires a state pesticide-applicator license in every state; lookup registries are linked in our state guides. Licensing rules and who can issue WDIRs vary by state.
3. Ask what happens if termites come back. Re-treatment-only warranties are standard; repair-covering bonds cost more (typically $500–$2,000 a year) and are worth it in high-pressure areas.
4. Be suspicious of same-day pressure. Termites work in months, not hours. A company that cannot wait 48 hours for your decision is selling fear, not treatment.

After Treatment: Preventing the Next Colony

Getting rid of termites once is expensive; keeping them away is cheap. Basic preventive termite control:

• Eliminate wood-to-soil contact — siding, posts and firewood should not touch the ground
• Fix leaks and grade soil away from the foundation; damp wood is an invitation
• Keep mulch and dense landscaping a foot or more from the slab or siding
• Ventilate crawl spaces and keep them dry
• Schedule an annual inspection — $75–$250 a year beats $2,500 every five

Treated homes stay protected for years with a liquid barrier (typically 5–10) or as long as bait stations are monitored. Prevention is where a termite bond earns its keep: inspections and re-treatment rolled into one contract.