Payment Processing Fees in Field Service Software
For most HVAC shops, card processing costs several times more than the software subscription. It is also the number almost no comparison article mentions.
Bundled processing in field service platforms typically runs 2.6% to 3.5% per transaction. On $150,000 of monthly card volume that is $3,900 to $5,250 a month — against a subscription of perhaps $300.
Most of that fee is not negotiable, because most of it goes to the card networks. But the part that is negotiable is worth five figures a year, and ACH sits there unused by most shops.
What you are actually paying for
The rate you are quoted is a bundle of three things, and only one of them is your provider’s.
Interchange goes to the bank that issued the customer’s card. It is set by the card networks and nobody negotiates it. It is also the largest component.
Network assessments go to the card network itself. Small, fixed, unavoidable.
Provider markup is what your processor or software platform keeps. This is the only piece anyone can move — and on meaningful volume, moving it slightly is worth a great deal.
Why your effective rate is higher than your quoted rate
Most shops are quoted a headline rate and then pay more. Four reasons:
Card type. Interchange varies by card. A basic debit card is cheap. A consumer rewards card costs more, because someone has to fund those rewards. A business or corporate card costs more still. If your commercial customers pay with company cards, your blended rate rises.
How the card was taken. A card physically tapped or dipped on site is the cheapest. A number keyed in over the phone costs more, because the fraud risk is higher. A shop that takes most payments by phone from the office pays more than one collecting on site — which is one more argument for on-site payment collection.
Per-transaction flat fees. Many rates come as “2.9% plus 30 cents”. On a $180 diagnostic that flat fee is another 0.17%. On a $40 filter change it is 0.75%. Small tickets are disproportionately expensive.
Monthly extras. Statement fees, gateway fees, PCI compliance fees, minimum monthly charges. Individually small, collectively a rate increase.
Take last month’s merchant statement. Find total fees charged and total volume processed. Divide the first by the second.
That is your effective rate, and it is the only number that matters. It is almost always higher than what you were quoted. Do this before any conversation with any provider.
ACH: the option most shops never enable
Automated Clearing House transfers move money bank to bank. They usually cost a flat fee per transaction rather than a percentage — commonly a few dollars, sometimes capped.
On a $180 service call the difference is trivial. On a $14,000 system replacement it is the difference between roughly $434 in card fees and under ten dollars.
Where ACH makes the most sense:
- Equipment replacements and installations — the tickets where percentage fees genuinely hurt
- Commercial invoices — business customers are already comfortable with bank transfers
- Maintenance agreement billing — recurring, predictable, and the customer sets it up once
The trade-offs are real: settlement takes one to three business days rather than being near-instant, some customers prefer cards for the rewards, and it requires the customer to share bank details, which a minority will resist. None of that changes the arithmetic on a five-figure job.
Ask specifically whether your platform supports ACH and at what cost. Some do and never mention it. Some charge a percentage for ACH too, which removes most of the benefit.
Surcharging and cash discounts
Some shops pass processing costs to the customer. Two mechanisms exist and they are legally distinct.
Surcharging adds a fee when a customer pays by card. It is subject to card network rules and to state law, and both restrict how it may be done — including caps on the amount, disclosure requirements, and outright prohibition in some jurisdictions.
Cash discounting posts one price and offers a reduction for cash or check. It is generally treated more permissively, because you are discounting rather than adding.
The rules here vary by state and change, and the card networks impose their own requirements on top. Verify the current position for your state before implementing either, and confirm with your processor that your setup complies with network rules. This is one of the few areas in software selection where getting it wrong has legal consequences rather than just financial ones.
Bundled processing vs your own processor
| Bundled with the platform | Your own processor | |
|---|---|---|
| Setup | Immediate, already integrated | Separate application and integration |
| Rate | Usually higher; convenience is priced in | Negotiable, especially with volume |
| Reconciliation | Automatic against jobs | May require manual matching |
| Features | Full — on-site capture, saved cards, agreement billing | Some platforms restrict features to their own processor |
| Best for | Shops under roughly $75k monthly volume | Higher volume, where rate beats convenience |
There is a crossover here much like the one in software pricing models. Below a certain volume, the integration is worth the premium. Above it, the premium becomes the largest avoidable cost in your software stack.
One warning: some platforms technically permit an external processor but disable on-site capture, saved cards or automated agreement billing if you use one. Ask exactly what you lose before assuming the option is real.
What to ask before signing anything
Six questions. Get the answers in the same written document as the subscription price.
1. What is the exact rate, including any per-transaction flat fee? “Around 3%” is not an answer.
2. Does the rate differ for card-present versus keyed-in? And by card type?
3. Is ACH available, at what cost, and is it a flat fee or a percentage?
4. What monthly fees exist beyond the transaction rate? Statement, gateway, PCI, monthly minimum.
5. Can I use my own processor, and what functionality do I lose if I do?
6. Is the rate fixed for the contract term, or can it change? Many can be revised with notice.
Frequently asked questions
What is a normal payment processing rate for an HVAC business?
How do I work out what I am really paying?
Can I negotiate my processing rate?
Should I use ACH instead of cards?
Can I charge customers a fee for paying by card?
Is it cheaper to bring my own payment processor?
What to do next
- Calculate your effective rate from last month’s statement. Total fees divided by total volume.
- Multiply the difference between your rate and 2.6% by your annual card volume. That figure is what the conversation is worth.
- Ask whether ACH is available and at what cost, then enable it for replacements and commercial invoices.
- Get the six answers above in writing from any vendor before you sign a subscription.
- What HVAC software costs — how processing fits into total cost of ownership
- How flat-rate price books work — pricing that accounts for real costs
- Moving from paper to software — why on-site payment comes first
Rates and fee structures in this guide are illustrative ranges compiled from published industry sources, not quotes. Processing rates vary by provider, volume, card mix and how payments are taken, and they change. Surcharging and cash discount rules vary by state and by card network and are subject to change — verify the current position for your jurisdiction and confirm compliance with your processor before implementing either. Nothing here is legal or financial advice.