AC Refrigerant Recharge (Freon Refill) Cost
Typical market range as of May 2026 · regionalized for northern Illinois
Most homeowners
$500
A refrigerant recharge tops off a system that's low — but here's the thing a good tech will tell you: a sealed AC system does not 'use up' refrigerant. If it's low, it's leaking. R-410A typically runs $40–$90 per pound installed, and a 3-ton system holds roughly 6–12 lbs, so a recharge plus the required leak check and labor commonly lands $250–$1,000+. Paying to recharge without finding the leak just buys you the same problem next summer.
Pricing this job, not hiring for it? See what the work is worth →What drives the price
Refrigerant type
R-410A is $40–$90/lb installed. Older R-22 systems (pre-2010) cost far more — R-22 is phased out and can run $100–$200+/lb when available.
Charge amount
Systems need roughly 2–4 lbs per ton. A 3-ton unit that's badly low needs more refrigerant and more labor.
Leak search & repair
Finding and fixing the leak (dye, electronic sniffer, coil or line repair) is separate from — and often larger than — the refrigerant itself.
Phase-out pressure
R-410A is being phased down for new equipment after 2025, which can push refrigerant prices up over time.
In our market — McHenry County & northern Illinois
In northern Illinois, a top-off with a basic leak check typically runs $300–$700. If your system is R-22 (common on units installed before ~2010), budget for a much higher number — at that point many McHenry County homeowners put the money toward a replacement instead of repeatedly recharging a leaking R-22 system.
Walk in informed
If a tech recharges your system without looking for the leak, that's a red flag — you'll be calling them back next season. A legitimate refrigerant service includes a leak check, not just a top-off.
Fair Price Guide is iHVAC's market research for informational purposes and is strictly advisory. Actual prices are set by the independent technician. iHVAC is not a party to any transaction and assumes no liability, operating with zero middleman billing or liability.
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For the tech
What this work is actually worth
Undercharging is the chronic problem for independent and side-job techs — you quote the part plus a little, forget what it really costs to show up, and train customers to expect cheap. The ranges above aren't a ceiling. Here's how to think about pricing this job so you're not working for free.
Why it's worth it
EPA 608 certification, recovery equipment, and the liability of handling refrigerant are real costs most homeowners never see. A proper leak search plus recharge is skilled, regulated work — price it that way.
Don't undercut yourself
Cheap top-offs without finding the leak undercut both your margin and your reputation when they call back next summer. Charge for the leak search; don't subsidize a problem you didn't create.
Build these into every price — not just the part:
Drive + windshield time. The hour each way isn't free. If you're not billing for getting there, you're working below your hourly.
Truck, tools, fuel. Your van, gauges, recovery machine — what they cost to own and run is overhead on every single call.
License, insurance, bond. Carrying real coverage is what separates you from the unlicensed guy. It has to be priced in, not eaten.
Callback & warranty risk. Some jobs come back. A price with zero margin for a return trip loses money on the ones that do.
Taxes & self-employment. As a 1099 independent you owe self-employment tax and your own withholding. The number you charge isn't the number you keep.
Your expertise isn't free. Knowing exactly what's wrong in five minutes is the product. An unskilled-labor rate undersells the one thing customers can't get elsewhere.
Help build the real number
The most accurate guide isn't built from national averages — it's built from what techs in your area actually charged. Contribute what you charged for this job and it feeds the local range here. It's opt-in, fully anonymized, and only ever shown as an aggregate once enough techs have contributed — never your individual price, never a price iHVAC sets, never a floor anyone has to hold. Just real market information, so the whole trade prices its work fairly.
Contribute what you chargedCommon questions
Why is my AC low on refrigerant if it's a sealed system?
Because it's leaking. Refrigerant isn't consumed like fuel — a low charge means there's a leak somewhere in the coil, line set, or fittings. The recharge is the band-aid; finding the leak is the actual fix.
Is it worth recharging an old R-22 system?
Often not. R-22 is phased out and expensive, and a system old enough to use it is usually near end of life. Many homeowners put recharge money toward a new R-410A or R-454B system instead.
How do I know if I even need refrigerant?
Only a tech with gauges can confirm a low charge. 'Low on Freon' is one of the most over-diagnosed problems in HVAC — get a real reading before you pay for refrigerant.
Related costs
How we research these numbers
This range is synthesized from published 2025–2026 US HVAC cost data and HVAC field knowledge, then regionalized toward northern Illinois. It's market reference — not a quote, and not a price iHVAC sets. As real techs complete jobs on iHVAC, these ranges will be backed by the actual local prices homeowners pay — the most accurate source there is.
References triangulated for this guide: