Hardware Shop Billing Software: Units, Contractor Credit and GST

A hardware shop may stock five thousand items, from 6 mm screws to 50 kg cement bags. It sells pipe by the metre, wire by the coil, paint by the litre and tiles by the box. Half its sales go to plumbers, electricians and contractors who settle at month-end. Generic billing apps struggle with all three. This guide covers what hardware shop billing software needs to handle, whether you run a sanitary, paint, electrical or building-material store.

What Makes Hardware Billing Different

• Many units of measure: bags, kg, metres, feet, coils, litres, boxes, pieces.
• Huge item lists: thousands of SKUs, many without a barcode.
• Different prices for different buyers: walk-in retail, contractor rate, dealer rate.
• Credit sales: contractors buy across a project and pay later.
• Bulky deliveries: delivery challans, vehicles and e-way bills for big orders.

GST Rates for Hardware and Building Materials

The big change for hardware was cement, which dropped from 28% to 18% on 22 September 2025. Almost everything else in a typical hardware store sits at 18%. A few specific items have moved to 5%, such as bamboo and cane furniture, so check the new GST rates list if you carry anything unusual.

Example: a cement bill

A contractor buys 10 bags of cement at ₹380 a bag, tax included. The bill total is ₹3,800. The taxable value is ₹3,800 ÷ 1.18 = ₹3,220.34, and GST is ₹579.66, which splits into CGST ₹289.83 and SGST ₹289.83 within the state.

Units of Measure Without the Headache

Your software should let you define the units you actually use and bill fractions where needed: 12.5 metres of pipe, 2.750 kg of nails. Set the unit on each item once, and the bill prints "12.5 mtr" instead of a confusing "12.5 pcs". In Billux you can add your own units (bag, coil, mtr, ltr, box and so on), and quantities accept up to three decimal places.

Contractor Credit, Price Lists and Collections

Credit is the lifeblood of a hardware shop and its biggest risk. Good software turns the notebook into a live ledger:

• Party ledger: every bill, payment and return for a contractor in one statement you can print or share.
• Credit limit warning: set a limit per contractor, and the invoice screen warns when a new bill would cross it.
• Party-wise price lists: the contractor's agreed rates load automatically when you pick their name (Billux Professional plan).
• Payment reminders: WhatsApp reminders with your UPI ID, before or after the due date.
• Cheque tracking: post-dated cheques from builders, with their dates, so none are forgotten.

We go deeper into credit in our guide to wholesale and distributor billing, and into udhaar for walk-in customers in our khata app guide.

Finding Items Fast in a 5,000-SKU Shop

• Search by part of a name: typing "elbow 1" should find "PVC Elbow 1 inch" instantly.
• Print your own barcodes for loose stock and fittings, so the counter scans instead of searching.
• Import your item list from Excel instead of typing it in. See our guide to switching from Excel or a notebook.
• Low-stock alerts, so fast movers like cement, putty and wire never run out in season.

Deliveries and E-way Bills

For a large site order, issue a delivery challan when the goods leave, followed by the tax invoice. An e-way bill is needed when the consignment value is above ₹50,000 (some states set different limits for movement within the state). Billux records the e-way bill number and vehicle number on the invoice, so they print with it.

How Billux Fits a Hardware Store

Billux's retail counter covers walk-in billing with barcode scanning and split cash/UPI/card payments, while the full invoice screen handles contractor bills with the party ledger, credit limits and delivery challans. GST reports and a Tally export are included for your CA. Standard is ₹2,500 a year, and Professional, at ₹5,500, adds party price lists, multiple godowns and purchase orders (see pricing).

Paint, Tile and Sanitary Shops: Practical Tips

Paint shops

Sell paint by the litre or by pack size (1 L, 4 L, 10 L, 20 L) as separate items, so stock counts match the tins on the shelf. Note the shade code in the line description on the bill. When a customer comes back for "the same colour", you can find it on their old bill in seconds.

Tile shops

Tiles are bought by area but sold by the box. Keep the item in boxes and work out the boxes from the area. For example, a 120 sq ft room with tiles at 16 sq ft per box needs 7.5 boxes. Add 10% for cutting and breakage (132 sq ft) and you need 8.25, so you bill 9 boxes. Give contractors a proforma invoice or quotation first, then convert the confirmed quantities into the tax invoice.

Sanitary and plumbing shops

Fittings come in dozens of sizes. Put the size in the item name ("CPVC Elbow 3/4 inch") so search finds it, and keep a short list of your top 50 fittings on the billing screen for one-tap billing.

Returns of unused material

Contractors often return unused pipes, fittings or unopened cement bags when a site finishes. Take the return against the original bill and issue a credit note at the rate charged on that bill, so stock comes back and the contractor's balance goes down by the right amount, tax included. Our guide to credit notes and sales returns explains the paperwork and the time limit.

The Bottom Line

The right hardware shop billing software is the one that speaks your units, knows your contractors' rates and tells you who owes what before you extend more credit. Set up items and units carefully once, and the counter gets faster every week. Start with your fifty fastest movers, add the long tail as it sells, and within a month the whole shop will be on the system.