Flea Treatment Cost Calculator

One treatment cannot work, and here is why

Fleas have four stages — egg, larva, pupa, adult — and the pupa is sealed in a cocoon that insecticide does not penetrate. At any moment, most of a flea population in a house is in that stage, under the carpet pile and down the sides of upholstery.

So a treatment kills the adults and the larvae it reaches, and then the pupae hatch. Two to fourteen days later there are fleas again, and it is not a new infestation and not a failed product. It is the life cycle.

The correct specification is two visits, ten to fourteen days apart. The second one catches what emerged after the first. If a company quotes a single visit and promises the problem is solved, either they are coming back free of charge — which is fine, get it in writing — or they will tell you it is a fresh infestation and charge again.

Treat the animal, or do not bother

The pet is the reservoir. Everything in the house came off the animal, and anything left on the animal re-seeds the house the day after the treatment.

Modern veterinary preventives are extremely effective — far more so than anything sold in a supermarket — and they are the single most important part of solving this. Get the animal treated by a vet at the same time as the house, not after.

Three things that matter:

• Treat every pet in the house, not just the one that is scratching.
• Keep it up for at least three months. The point is to cover the emergence of everything already in the carpet.
• Supermarket collars and spot-ons are largely why people end up calling an exterminator. Resistance to older pyrethroid products is widespread.

If there are no pets and you have fleas, something else brought them — a previous tenant's animal, wildlife in a crawl space or attic, or a visiting cat. That is worth establishing, because treating the house repeatedly while a raccoon lives above the ceiling does not end.

Vacuuming is part of the treatment

Not tidying up. The vibration of a vacuum is what triggers pupae to emerge, and an emerging flea in a treated house walks into insecticide.

• Vacuum thoroughly before the treatment, including under furniture, along baseboards and the edges of every room where the pile is deepest.
• Then vacuum daily for two weeks afterwards. This is the instruction people ignore and it is the one that shortens the whole process.
• Empty the canister or bin outside, every time.
• Wash all pet bedding and any human bedding that is involved at the hottest setting the fabric allows, and dry it hot.

Do not throw out furniture. Treatment plus vacuuming clears upholstery. Replacing a sofa because of fleas is money spent on the wrong thing.

What the treatment should include

Ask for these by name, because the first one is what cheap treatments leave out:

• An insect growth regulator such as pyriproxyfen or methoprene. It stops eggs and larvae developing, and it is the difference between a treatment that holds and one that buys three weeks. A treatment without an IGR is not a flea treatment.
• Whole interior floor area, not a perimeter band — carpets, rugs, upholstery, pet resting places, under furniture, and the full width of every room rather than the edges.
• The yard, in the right places. Fleas do not live in open sunny lawn; they live in shade and moisture where the animals rest — under decks, along fence lines, in the shrub beds, under the porch. A yard treatment that covers the lawn and misses those is the wrong way round.
• The crawl space or under the porch if animals get under there.
• A follow-up visit at ten to fourteen days.

What does not work

• Flea bombs and foggers. The aerosol settles on top of carpet and upholstery and does not reach down into the pile where the larvae and pupae are, nor into the cracks where adults shelter. They also distribute propellant through a house that may have an ignition source, which is a genuine hazard. Professional application is targeted and worked into the surfaces instead.
• Salt and diatomaceous earth as a whole-house answer. DE does work on insects mechanically, slowly, and only while it is dry and undisturbed — which is not a carpet somebody walks on.
• Treating the house and not the pet. Covered above, and it is the commonest reason a treatment appears to fail.
• Waiting it out in an empty house. Pupae can lie dormant for months and emerge when they detect warmth, carbon dioxide and vibration — which is why people walk into a vacant house and are bitten within minutes.

Bites, and when it is not fleas

Flea bites are typically on ankles and lower legs, in small clusters, intensely itchy, with a central dark point. They are often the first sign in a house where nobody has seen a flea.

Two checks before paying for anything:

• Wear white socks and walk slowly through the affected rooms for ten minutes. Fleas jump to the warm moving target and are obvious against white.
• Flea comb the pet over a sheet of white paper. Flea dirt — digested blood — turns rust red when wetted. That is a positive identification even with no live fleas visible.

If bites are around the waistband, trunk or upper body, or appear in a line or a row, consider bed bugs instead. It is a different treatment entirely and a much more expensive one, so identifying it correctly matters.

What you are paying for

A one-time treatment of an 1,800 square foot house, at $255:

This is the highest material cost of any species on the general pest model, because a flea job treats the whole interior floor rather than a perimeter band, and treats outside as well.

Questions worth asking

• Is a follow-up visit included, and when?
• Does the treatment include an insect growth regulator?
• Is the whole floor area being treated, or the perimeter?
• Is the yard included, and which parts?
• Is the crawl space or under the porch being looked at?
• What do I need to do before you arrive?
• How long until we can be back in the rooms?
• Is it safe for the cat, the fish and the baby?
• What happens if we still have fleas in three weeks?
• Have the pets been treated by a vet?