SideWRK is a cheap invoicing app for HVAC techs who work on the side.
It puts the customer, the property and the invoice together, then shows what you kept on the call after parts and time.
SideWRK is $19/mo invoicing for side work, 5 jobs/year free, no cut of payment.
SideWRK starts every HVAC tech at these prices and does this math on every job you write up. Change any number.
What an HVAC job looks like in SideWRK.
The HVAC job as the app lays it out — your own cost sitting on it, and the estimate your customer approves from their phone.
Built for hvac side work — in one app
Branded estimates & invoices
Diagnostic, capacitor, refrigerant — each on its own line of a numbered estimate carrying your name, logo, and license number, sent from the attic or the truck. It reads like it came from a real shop.
Customers approve from their phone
The homeowner gets a branded link, sees the photos of the burnt contactor or the iced coil, and taps Approve — name, time, and amount logged. The fix grows once you're into the system? They approve the new total before you keep going.
Real profit, not just revenue
Parts and refrigerant carry a private "your cost" the customer never sees, so the Money tab shows what the no-cool call actually made you — not just what the ticket said.
Photos that document the work
Shoot the frozen evaporator, the burnt wire, the clean install after. Texted proof gets the repair approved fast, and the record stays on the job for next season's call.
One flow, start to paid
One job runs the whole call — estimate, approval, invoice, payment — and flips to Paid on its own the moment the balance hits zero.
Refrigerant-aware documentation
Venting refrigerant is illegal under the Clean Air Act — SideWRK won't document a vent, it documents a recover-and-repair. Your license & permit number print on every invoice. Tools and reminders, never legal advice.
HVAC
The work this app was built around.
Estimate. Invoice. Get paid.
SideWRK runs the business side from your phone, on the job.
It puts the customer, the property and the invoice together, then shows what you kept after parts and time.
From first call to "paid" in three steps
Write it up
Add the customer and the unit, then the work — the diagnostic, the part, a photo of the problem. Send the branded estimate from the roof if that's where you are.
Send it
They see the photos and the price and tap Approve from their phone. The yes is logged with the time and the amount.
Get paid
It becomes a numbered invoice with your license number printed on it. Record payment and the real profit on the call lands in Money.
What should an HVAC tech charge?
HVAC starts with a service-call or diagnostic fee, then flat-rate repairs, with installs priced by the unit. Here's how it's priced, plus free calculators to find your number.
Service-call or diagnostic fee
Most HVAC techs charge a diagnostic fee of about $80–$150 to come out, often credited toward the repair.
Flat-rate repairs
Repairs run off a flat-rate menu — capacitor, motor, refrigerant, board — so the customer approves a number before you start.
Installs and seasonal demand
System change-outs are priced by tonnage and unit, plus permits. Peak summer and winter demand, and access, move the number.
HVAC calculator
Weekend changeouts pay — if your rate covers the gauges, the refrigerant, and the drive.
The hvac rate behind SideWRK's estimating defaults is $110/hr, with 55% of a typical ticket paying for time rather than materials. Both numbers come from our 2026 Side-Work Rate Report, which publishes the same figures for all 42 trades.
These tools run free right here — inside SideWRK they fill your estimate for you →
One plan. Every trade. $19.
There is one plan and this is it. The HVAC build you are looking at is one of 42, and every one of them is already switched on — no upgrade, no add-on. Pick up a different trade next month and the app switches with you. Your customers come with you — one book of people, every job you have ever done for them, whichever trade you had your hat on for that day. $190 a year if you pay yearly, which is two months free.
- Branded estimates & invoices
- License # on every invoice
- Customer approvals + photos
- Real profit tracking
- All 42 trades, switched on — not a bundle, not an add-on
- One customer list across every trade — the same person, every job you ever did for them
- Unlimited customers and jobs — no caps
- Real profit on every HVAC job, from your own private cost
- HVAC expenses, mileage and a year-end tax packet
- Your own HVAC page, work gallery and booking requests
- Card, Apple Pay, Venmo, Cash App — Zelle if your bank offers it — or cash
Nothing above is behind a higher tier. There is no higher tier.
SideWRK is $19/mo invoicing for side work, 5 jobs/year free, no cut of payment.
HVAC FAQ
Does it track HVAC permits and inspections?
Yes. Each job has a permit panel — number, authority, status, and rough-in/final inspections with dates — and the permit number prints on the estimate and invoice.
Do I need to install anything?
No — SideWRK runs in any phone browser, nothing to download. Everything syncs to the cloud, so your phone on the job and your laptop at night see the same data.
Can I run more than one trade?
Yes — every trade is unlocked and you switch between them in a tap, sharing one customer list.
What should an HVAC tech charge?
Most HVAC techs charge a diagnostic fee of about $80 to $150, then flat-rate repairs off a menu, with installs priced by tonnage and unit plus permits. Peak-season demand and access raise the number. Use the free hourly rate calculator to find your number.
How much does it cost?
SideWRK is $19/mo invoicing for side work, 5 jobs/year free, no cut of payment. Paying lifts every limit — $19 a month, or $190 a year.
How do I write an HVAC invoice that looks legit?
Your name, logo, and license number print on a numbered invoice. Line items for the diagnostic, the part, the labor. Photos of the burnt capacitor or the iced coil ride with it. The customer sees a shop document, not a napkin.
Does SideWRK take a cut of what I get paid?
No. SideWRK takes no cut of a payment. Card money lands in your own Stripe account. Cash, Venmo, Cash App, or Zelle where your bank offers it for business — mark it paid the same way.
How do I invoice an HVAC side job?
Open a job, add the diagnostic and the work, send the branded estimate. They approve from their phone. It becomes a numbered invoice with your license on it.
Can I send an HVAC estimate from my phone?
Yes. SideWRK runs in the phone browser. Write it in the attic or the truck, send the link, they tap Approve.
Is SideWRK only for full-time HVAC shops?
No. It's built for side work — weekend changeouts, after-hours no-cools, the calls you take besides the day job. Five jobs a year stay free.
Wondering what to charge? How to price HVAC jobs — with real numbers →
Working with refrigerant? The EPA 608 records, explained →
Run your hvac side work like a real business.
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