This is a plain-language overview for shop owners, not tax advice. Rules and thresholds change, and your accountant or the official GST portal should always be the final word for your specific business. What follows is meant to help you ask the right questions, not replace them.
Why boutiques get this wrong more than most
A boutique often sells two different things under one roof: ready-made products at the counter, and custom stitching that can stretch over days or weeks with an advance paid up front. Retail billing software is usually built for the first case. Tailoring registers are built for the second. Very few small shops have one clean system that handles both, which is exactly where GST record-keeping starts to slip.
The mistakes that actually cause trouble
- Mixing advance and final billing. An advance taken against a stitching order is not the same as the final sale value, and treating them the same way in your records creates a mismatch your accountant has to untangle later.
- Inconsistent invoice numbering. A handwritten book and a phone calculator rarely produce a clean, sequential invoice series, which matters more than most owners realise when it is time to file.
- No copy kept for the shop. If the only invoice copy leaves with the customer, the shop has no record to fall back on during a dispute or a filing season.
- Product sales and stitching charges lumped together. These can carry different treatment, and combining them into one vague line item makes the books harder to explain later, not easier.
The goal is not to become an accountant. It is to keep clean enough records that your accountant's job is boring instead of stressful.
A simple habit that prevents most of this
- Generate a proper invoice at the point of sale, every time, rather than "at month end from memory."
- Keep product sales and stitching orders as clearly separate line items, even on the same bill.
- Record advances against the specific order they belong to, not as loose cash in a drawer.
- Keep a shop-side copy of every invoice automatically, not as an afterthought.
This is precisely what Fashion Flow's Billing & Invoices module is built around: a proper invoice generated at the counter or against a stitching order, sent straight to WhatsApp, with a shop-side copy kept automatically and dues that update themselves as payments come in. If you are weighing this against your current notebook setup, our piece on notebook versus software covers that decision in more depth, and the pricing page lays out what is included at each plan.