From the KillStock blog
Field notes on inventory, GST, and the day-to-day of running an SMB.
- 4 min read
IRN and the QR code on your invoice, explained
The IRN is the unique number the Invoice Registration Portal gives your invoice; the signed QR code is its proof. What to print, and how to fix a wrong one.
gstRead - 5 min read
The five e-way bill mistakes that cause detention
Wrong Part-A details, a missing vehicle number, expired validity, a wrong distance, one bill for many invoices: how each happens and how to avoid it.
gstRead - 6 min read
The monthly GSTR-3B checklist for a small business
Nine checks to run before you submit GSTR-3B: sales match, credit match, ineligible credit reversed, tax paid from the right ledger, then file and keep the proof.
gstRead - 5 min read
Input tax credit: when you get it and when you lose it
When you can claim input tax credit on a purchase, what makes you lose it, which purchases are blocked, and how to keep your claim clean month after month.
gstRead - 6 min read
How to file GSTR-1 straight from your sales records
How to file GSTR-1 from your own sales data: which bills go in which table, how to check totals before you file, and how to correct a mistake afterwards.
gstRead - 7 min read
How to reconcile GSTR-2B with your purchase register
How to match GSTR-2B against your purchase register on supplier GSTIN, invoice number, date and value, what each kind of mismatch means, and how to fix it.
gstRead - 6 min read
Do you need to generate e-invoices?
What GST e-invoicing (IRN and the IRP) actually is, who it applies to, how it differs from a normal GST invoice, and the practical steps a shop owner should take to find out and prepare.
gstRead - 5 min read
How to find the right HSN code for your product
What an HSN code is, why it decides your GST rate and return, how a shop owner finds the correct one, the mistakes to avoid, and how to store it once per item.
gstRead - 4 min read
Size × colour: stop creating a thousand SKUs
Manage a garment style once and let sizes and colours sit under it as a matrix. How to set up size-colour stock, buy by size curve, and report by style.
apparelRead - 5 min read
CGST + SGST or IGST: how to decide, every time
One question decides it — is the place of supply in the same state as you? If yes, charge CGST and SGST. If no, charge IGST. Worked examples, edge cases and the traps.
gstRead - 5 min read
Excel vs inventory software: when the spreadsheet stops paying
Excel is fine for a small, single-location stock list. It stops paying the day you add GST invoices, a second godown, batches, or a second person editing it.
excelRead - 5 min read
FIFO, LIFO and FEFO: which one your business needs
FIFO ships the oldest stock first, FEFO ships the soonest to expire first, and LIFO is a costing idea Indian accounting standards do not allow. Here is which one to use.
inventoryRead - 6 min read
What a GST invoice must contain
The mandatory fields on a GST tax invoice — GSTIN, serial number, HSN code, taxable value, tax rate and place of supply — and why each one matters at return time.
gstRead - 5 min read
The reorder point formula, with Indian lead times
Reorder point = average daily use × lead time in days + safety stock. Worked in rupees and units, with the lead times an Indian shop or distributor actually sees.
inventoryRead - 5 min read
Distributor inventory: routes, credit and ageing
For a distributor, stock is the easy half. Routes, credit limits and ageing buckets decide whether the money comes back. How to run all three from one record.
distributionRead - 2 min read
Restaurant inventory and food costing without the guesswork
How shelf-life, recipes, and menu backflush turn a restaurant's stockroom into numbers you can trust — so you cut spoilage and actually know your plate cost.
fnbRead - 2 min read
Pharmacy inventory: batch and expiry done right
Why batch tracking and first-expiry-first-out (FEFO) are non-negotiable for pharmacies and distributors — and how to enforce them without slowing the counter.
pharmaRead - 2 min read
How to choose inventory software for an Indian SMB
A practical, no-nonsense checklist for picking inventory software that fits how your business actually runs — GST, multi-location, and vertical depth included.
inventoryRead