Service centres
GST invoice software for AC and appliance service centres
A technician fixes a split AC in Kakkanad, fits a capacitor and tops up the gas. The invoice should say exactly that, with the right codes, before he leaves the flat.
In short
SimpleERP is invoice software for AC and appliance service centres in India. One GST invoice carries spare parts with their HSN codes and service charges under SAC 9987, picks CGST and SGST or IGST, and prints a UPI QR for payment.
Illustration of GST tax invoice INV-2026-27-0213 to Ravi Stores with CGST 9% and SGST 9%, round off, a UPI QR code and the amount in words.
A GST billing day at Coolcare Appliance Services
Coolcare Appliance Services in Kochi repairs split AC units, refrigerators and washing machines across Edappally, Kakkanad and Vyttila, and holds AMC contracts with forty flats and six offices. On a hot April morning the counter logs thirty service calls before noon.
Each call ends in a bill with two kinds of lines: the part that went in, such as a run capacitor, a fan motor or a refrigerator PCB, and the service charges for the visit, the gas charging or the labour. Some homeowners pay on the doorstep; the offices want a monthly bill with their GSTIN printed on it.
In SimpleERP the counter enters that bill once. Parts leave stock, the service charge goes to income, and the GST splits the way the customer's state requires.
How do parts and service charges sit on one bill?
Add parts as products with an HSN code and stock, and services such as gas charging, PCB repair or an inspection visit with SAC 9987 and no stock. Both go on the same invoice, each at its own rate.
- A free-text line for an odd job such as refitting an outdoor unit bracket.
- An HSN-wise summary at the foot of the print for an office's accounts team.
- A white A4 print or a PDF to send to the customer after the visit.
Illustration of the keyboard-first invoice editor with a focused line, live tax totals and shortcut hints.
Which HSN and SAC codes does a service centre use?
The codes below cover most of a Coolcare day. Set them once on each part or service and the counter never looks them up again.
- Rates live on the product, so a new counter clerk bills a capacitor at the same rate the owner would.
| Line | HSN or SAC | Usual GST, to confirm |
|---|---|---|
| Compressor for a split AC | HSN 8414 | Changed in September 2025 |
| Run capacitor | HSN 8532 | Commonly 18% |
| Refrigerant gas R32, per kg | HSN 2903 | Commonly 18% |
| Washing machine or refrigerator PCB | HSN 8537 | Check the part's own code |
| Repair, gas charging and visit charges | SAC 9987 | Commonly 18% |
| AMC for appliances | SAC 9987 | Commonly 18% |
How do you bill an AMC contract for a flat or an office?
An AMC is a service line under SAC 9987. Bill a ₹4,500 yearly contract for two split AC units once at signing, or quarterly if the office prefers, and log each visit as a note on the customer so the next technician knows what was cleaned.
- Follow-ups with due dates tell the counter when the next visit or renewal falls due.
- A customer statement for an office that settles AMC and repair bills together at month end.
- A credit note when a part covered under warranty was billed by mistake.
Can the customer pay on the doorstep?
Every printed invoice carries a UPI QR code. The technician shows it, the customer pays, and the counter records the receipt against the invoice when the money reaches the bank.
- Part payments leave the invoice partially paid, with the balance shown.
- Cash a technician collects goes to a cash account first and moves to the bank with a transfer when deposited.
One system
Where service billing connects
Saving a repair invoice takes the spare parts out of stock, posts income and GST, and adds any unpaid amount to the customer's ledger.
Repair and service centres
Spares and labour on one GST invoice, spares stock by centre, AMC follow-ups and technician claims.
See howInventory for service centres
Spare parts counted by back room and technician kit at average cost, with reorder levels and purchase orders to each parts dealer.
See howAccounting for service centres
Parts margin, service and AMC income, technician cash and dealer dues in one double-entry ledger for repair and service centres.
See howPayroll for service centres
Technician pay from phone check-ins, conveyance and incentives, fuel and parts claims, and advance recovery posted to the books.
See howGST billing
Tax invoices with CGST, SGST or IGST by place of supply, HSN on every line and a UPI QR on the print.
See how
Honest limits
What SimpleERP does not do yet
- E-invoice IRN and QR code, and e-way bills, are not generated through the government APIs
- Cess is not calculated; GST return filing stays with you or your accountant
- No price lists: every line is priced as you bill it
- No job sheets or service tickets: log the complaint as a note on the customer and bill when the repair is done
- No warranty or serial number record for compressors and appliances
Getting started
Start with GST billing
Sign up with your phone
Name, phone number and a password. No card for the seven-day trial, and email is optional.
Tell us about the business
Type your GSTIN and the state fills itself. Accounts, GST rates, units, roles and numbering are seeded for you.
Add what you sell
Add your common spare parts with HSN codes, then gas charging, inspection visits, labour and AMC as services under SAC 9987.
Post your first GST invoice
Pick the customer, add lines and save. The place of supply picks CGST and SGST or IGST for you.
FAQ
Questions, answered
Can one bill carry a part and the labour to fit it?
Yes. The part goes on as a product with its HSN code and leaves stock; the labour goes on as a service under SAC 9987 with no stock. Each line has its own rate, and for a customer in Kerala the tax splits into CGST and SGST.
An office in Coimbatore wants our AMC. What changes?
Their GSTIN starts with 33, the code for Tamil Nadu, so SimpleERP charges IGST in place of CGST and SGST. Nothing changes in how you bill: the split follows the place of supply on the invoice, and the GSTIN is checked as you type it.
We fixed an AC under the brand's warranty. Do we still bill?
Bill the brand or its service partner, not the homeowner, for whatever they pay you per call. Add them as a customer with their GSTIN. SimpleERP keeps no warranty register, so note the model and serial number in the line description.
Can technicians raise the bill themselves?
Give them a role that can create invoices and they can bill from a phone browser at the customer's door. SimpleERP is a web app that works on a 360 px screen, with nothing to install. Many centres let the counter bill instead and keep technicians on the Employee role.
Related
Keep reading
Repair and service centres
Spares and labour on one GST invoice, spares stock by centre, AMC follow-ups and technician claims.
Read moreInventory for service centres
Spare parts counted by back room and technician kit at average cost, with reorder levels and purchase orders to each parts dealer.
Read moreAccounting for service centres
Parts margin, service and AMC income, technician cash and dealer dues in one double-entry ledger for repair and service centres.
Read more
See how GST billing works in SimpleERP for repair and service centres
Seven days free. No card. Your first GST invoice in minutes.