Find out what a board costs before you commit to it, and what it actually cost after you built it. PartsBox prices a BOM from live distributor offers and your own local quotes, and recomputes the moment a quantity or a price changes.
For every part with a manufacturer part number, PartsBox gathers the distributor offers — typically twenty to forty — and picks the best one. The choice accounts for what a spreadsheet ignores: price breaks at each quantity, minimum order quantities, order multiples, stock and availability, and currency, converted at European Central Bank rates.
Offers are ranked by effective price — the real cost once any unavoidable excess is counted. When you need 4200 pieces of a part that ships on reels of 5000, PartsBox counts the 800 you did not want and compares anyway, because a higher price break can still win after the surplus is written off. That is how it can tell you when buying more is cheaper. And because the ranking depends on quantity, the best source changes with the build size: distributors that only make sense at volume surface on their own. Lock the offer on any line to fix the selection.
Set the build quantity to price one board or a full run, and choose whether to use local stock, buy everything fresh, or use stock first and buy the rest. Vendor rules decide which distributors count, ordered into fallback chains — and because you switch rule groups with a click, they double as buying scenarios: compare "local vendors only" against "any distributor" before you commit. Add your own offers for negotiated quotes and local suppliers, with their own price breaks, minimum quantities, and currencies, and they are ranked on the same terms as the catalog prices.
The whole BOM is priced, not only the components. Required quantities include attrition overhead when you have set it. Non-part lines — PCB fabrication, assembly, testing, packaging — take offers exactly as parts do. A part bought by length, weight, or volume shows a price per vendor package and per unit, such as $0.14/mm, and every offer is reduced to a common unit so a spool and a reel compare directly. Export the priced BOM as a PDF with your logo for a customer-facing estimate.
A finished build records its cost: every build keeps the exact stock it consumed and what that stock was bought for, so you see what a run really cost, not a forecast. With lot control, the cost comes from the specific lots the build drew down, at the price each one was purchased for — an exact cost of goods for the batch, even when component prices moved between orders. Without lot control, the cost falls back to a weighted average across purchases.
BOM pricing, multiple currencies, and vendor rules start on the Essentials plan. Attrition is on the Production plan. Exact cost from the specific lots a build consumed comes with lot control, on the Control plan.