Shop Billing & Inventory — Receipts, GST Invoices & Stock in One App

Most small shops run two disconnected systems: something that makes bills, and something (usually memory or a separate register) that tracks stock. When they don't talk, bills go out for items the register still thinks are on the shelf. Shop billing and inventory in Pasal Manager is one flow — the bill is generated, shared on WhatsApp as a PDF, and the stock count moves with it, automatically.

Billing that takes seconds at the counter

PDF receipts, shared directly

Generate an A5 PDF receipt or a GST invoice from the sale and share it on WhatsApp without leaving the app — no separate billing software, no PC, no printer driver. The customer gets a durable digital bill; you get a record that already matches your sales history and stock entries.

GST when you need it

Shops registered under GST can issue GST invoices from the same flow — no "please come back tomorrow for the GST bill" excuse, no dual software. Invoice details are pulled from the customer and item records you already maintain.

Payment modes, recorded correctly

Each bill records how it was paid — cash, UPI (QR codes for GPay, PhonePe, Paytm, BHIM and others), or card — so the bill, the sales report and the cash drawer all agree at closing. Udhaar bills (credit to a customer) tie into the udhaar book balance for that person.

Inventory that moves with every bill

This is where combined billing and inventory pays off:

• Sale → stock downItems on the bill are deducted from quantity automatically.
• Purchase → stock upSupplier receipts add quantity back with price and date.
• Low-stock alertsFlag items before they disappear off the shelf.
• Barcodes & labelsAuto-generated codes; printable labels for shelf tags.
• Prices stay consistentSelling price on the bill = price in the item record.
• Reports connectWhat sold, what's left, what's worth — one dataset.

No re-entering quantities after billing. No month-end surprise that the "in stock" number was fiction. Details on the stock side live in the inventory management app guide.

The billing-to-report chain

1. Bill created — items, amounts, customer, payment mode.
2. PDF shared — receipt or GST invoice out on WhatsApp.
3. Stock adjusted — quantities reflect the sale immediately.
4. Sales recorded — the day's revenue includes this bill.
5. Profit updates — sales and expenses net out in P&L views.
6. Cashbook matches — payment mode ties to drawer/UPI/card totals.

One entry at the counter propagates through every ledger that matters — the reason to keep billing and inventory in the same app rather than stitching exports together at night (see sales & expense tracking for the money side).

Works offline, too

Bills are generated on-device, so a no-internet day doesn't pause billing — only the WhatsApp send waits for a connection (see offline shop management). Stock entries in the back room work the same way: recorded locally, synced later. PIN lock and biometric keep billing data private to your device.

No hardware required

No thermal printer mandate, no billing machine, no desktop POS. A phone and a normal printer (for barcode labels or paper copies if you want them) cover it — and individual shops use it free forever. Guest mode means you can issue your first bill before you've even made an account.

Billing + inventory sits at the centre of the shop management app; for kirana-counter patterns see the kirana guide, and for ₹/UPI/Hindi specifics the India page.