Assemblers · Fabricators · Makers — built with a real drone workshop

Bill the machine. Track every part.

You buy motors, frames and boards — and sell a drone. Generic billing tools make you choose: invoice one line and fix your stock by hand, or invoice every part and show the customer your margins. Mera does what your workshop actually does: one priced product, the parts list underneath, and stock that deducts every component on its own.

Start billing free See how it works

✓ Part prices never print ✓ Component stock deducts itself ✓ Free plan, no credit card

Tax Invoice · INV-0042

Assembly billing

ItemQty · Amount

Surveillance Drone X1 · HSN 8806 1 · ₹85,000

↳ Brushless motor 2212× 4 · —

↳ Carbon frame F450× 1 · —

↳ Flight controller× 1 · —

↳ Propeller pair 1045× 2 · —

GST 18%₹15,300

Grand total ₹1,00,300

Stock: 4 motors, 1 frame deducted · Part prices hidden

Billing that finally understands assembly

Built alongside a working drone assembly unit — then made to fit every workshop that turns parts into products.

One line, full story: The assembled product carries the price and GST. The components print underneath — names and quantities only, indented, unpriced. Professional for the customer, private for you.
Reusable bundles: Save a build once — its parts and quantities live on the product. Next order, pick the bundle and the whole list fills in. One-off custom builds work too: add components on the fly.
Stock that deducts parts: Sell one drone → 4 motors, 1 frame and 2 propeller pairs leave inventory automatically. Short on a part? You get a warning, never a blocker — the sale still goes through.
Low-stock alerts on parts: A quiet chip right on the billing screen: "3 left after this sale". You find out while quoting — not mid-assembly with a customer waiting.
Purchase orders for parts: Raise POs to your part suppliers, receive goods partially or in full, and stock updates as deliveries land. The procurement side of the workshop, in the same app.
Scan supplier bills with AI: Photograph the parts bill from your supplier — items, amounts and GST are extracted into a draft purchase entry. Less typing between deliveries and builds.
Delivery challans for job work: Sending goods for powder coating, machining or approval? Raise a Rule 55 delivery challan — reason for movement, its own number series, no tax charged — in the same three clicks as an invoice.
Quotes customers accept in one tap: Share a quote as a link. Your customer opens it on their phone, taps Accept, and you get notified — then convert to an invoice without re-typing a single line.

The two bad options end here

In most billing software, an assembled product forces a choice you shouldn't have to make.

Bad option 1

Bill one line, fix stock by hand

Invoice "Drone — ₹85,000" and your motors, frames and boards never leave inventory. Every month-end becomes a manual stock reconciliation from memory.

Bad option 2

Bill every part, expose your margins

List each component with its price and the customer learns your costing — then negotiates you down part by part, or buys the parts themselves.

The Mera way

Priced product, listed parts, live stock

One price on the assembled product. The parts list underneath — quantities only. Inventory deducts every component the moment you bill. Everyone sees exactly what they should, and nothing more.

Parts bin to invoice in three steps

Stock your parts

Add components with opening stock — or photograph supplier bills and let AI draft the purchase entries. POs and goods receipts keep counts true from day one.

Save your builds

Create a Bundle for each product you assemble — the parts and quantities live on it. Custom job? Skip the bundle and add components directly on the invoice.

Bill the build

Quote it, convert to invoice, get paid by UPI — GST lands on the product, parts print unpriced, and inventory updates itself. Books and GSTR-ready exports come free with it.

Made for workshops like yours: drone & RC builders · electronics assembly · custom PC builders · solar installers · furniture & modular kitchens · fabrication job work · machine builders · kit & hamper makers.

"I manage 4 clients. Mera helped me to prepare the books efficiently."

Ellanti Sai Prasad · Sales, Planet Sigma Embedded Systems The drone assembly unit this feature was built with.

Questions makers ask

Do component prices show on the invoice? +

No. The assembled product carries the price and the GST; the components list underneath shows only names and quantities. Your customer sees exactly what they're getting — your part costs and margins stay yours.

Does stock actually deduct the parts when I bill the product? +

Yes. Each component row keeps its link to your parts inventory, so selling one assembled unit deducts every listed part automatically — 4 motors, 1 frame, 8 screws — the moment the invoice is saved. If a part is short, you get a warning, not a blocker.

Do I have to rebuild the parts list on every invoice? +

No. Save any build as a Bundle product once — its parts and quantities are stored on the product. Next time, pick the bundle and the whole components list fills in. You can still tweak parts per order, or build one-off assemblies from scratch.

Does this work on quotations and proformas too? +

Yes — quotations, proforma invoices and tax invoices all support assembly lines with component sub-rows, and converting a quotation to an invoice carries the whole structure across. Stock deducts only when the actual invoice is raised.

How is GST handled on an assembled product? +

GST is charged on the assembled product's price at its HSN and rate — components carry no tax rows of their own, so totals, GSTR-1 and GSTR-3B-ready exports stay clean. CGST/SGST vs IGST is derived from GSTINs automatically.

What does it cost? +

There's a free plan to start, and paid plans from ₹149/month when you need more volume. Assembly billing, bundles and component stock tracking are part of the product, not paid add-ons.