Guides
The background the tools assume. Written for people running the business rather than for accountants, and specific enough to act on.
Designing an SKU system you will not regret
What belongs in a product code and what does not, why encoding price or supplier goes wrong, and how to keep a scheme extendable as the range grows.
4 min read · updated 26 August 2026
Margin and markup are not the same number
A 50% markup is a 33% margin. Confusing the two is the most common pricing error in small businesses, and it always errs towards underpricing.
4 min read · updated 26 August 2026
Offer letter, appointment letter, agreement: the order they go in
Three documents in a hire, each doing a different job. Sending the wrong one, or only one, is how disputes over notice periods and probation start.
5 min read · updated 26 August 2026
Quotation, estimate, proforma or invoice: which to send
Four documents that look alike and commit you to very different things. What each one means, when to send it, and why sending the wrong one costs money.
5 min read · updated 26 August 2026
What a GST invoice must contain
The fields a GST tax invoice needs, when the tax splits into CGST and SGST versus IGST, and the mistakes that make an invoice unusable for your buyer.
6 min read · updated 26 August 2026
What an EMI actually costs you
Why a longer tenure lowers the monthly figure and raises the total, how much of an early instalment is interest, and the two numbers to compare when choosing a loan.
5 min read · updated 26 August 2026
What an NDA does, and what it will not save you from
One-way or mutual, what counts as confidential, why a term matters, and the realistic limits of a document that only helps once you are already in a dispute.
5 min read · updated 26 August 2026