There's nothing wrong with starting inventory in a spreadsheet. It's free, it's flexible, and for a handful of products it's genuinely enough. But spreadsheets don't know what your products are made of, and that's the gap that eventually starts to hurt. Here are the signs you've hit it.
1. You make and sell, but the numbers don't move themselves
Every time you make a batch or sell an item, you have to remember to update two places (your materials and your finished stock) by hand. Miss one and the whole sheet drifts. A real system links them: make a product and materials draw down; sell one and finished stock drops.
2. You've oversold something you couldn't make
If you've ever sold an item only to find you were out of a key material, your spreadsheet isn't warning you in time. Reorder alerts that fire before you hit zero are the single biggest reason makers switch.
3. You can't answer "how many can I make right now?"
It's the most useful question in a maker shop, and a spreadsheet can't answer it, because it doesn't know your recipes. A tool that links products to their materials tells you instantly.
4. You're not sure what each product really costs
When material prices change, do your product costs update? In a spreadsheet, only if you redo the math everywhere by hand. That's how makers end up pricing on stale numbers and quietly losing margin.
Spreadsheets store numbers. An inventory system keeps them true.
5. Inventory has become its own chore
If you're spending evenings reconciling counts instead of making or selling, the tool has flipped from saving time to costing it. That's the clearest sign of all.
What to move to
You don't need enterprise software. You need something built for makers: it should link materials to products, draw stock down when you make and sell, alert you before you run out, and keep a true cost per item. Keepsel does all four from the Maker plan, and Suli takes your spreadsheet as it is: drop it in, Suli works out the columns, and you check it all in a table before anything goes in.
Starter is free for 30 days, so you can try the workspace before the spreadsheet costs you a sale.