Karting team parts inventory: track stock, usage and what to charge

Small parts are where a team quietly loses money: a chain here, a set of pads there, a handful of bolts nobody wrote down. A simple catalogue, a rule for pricing, and a habit of recording usage during the weekend are enough to stop it.

Start with a catalogue, not a spreadsheet of everything

List the parts you actually stock and use, each with a part number, a name, the price you pay (buy price), the price you charge (sell price) and how many you have. If your parts come from a manufacturer's list, such as the OTK range, start from that list and remove what you will never stock, rather than typing it all in again.

Pricing: buy price, sell price and margin

• Keep the buy price private to the people who order. A mechanic marking a part does not need to see it.
• Set the sell price as the buy price plus a percentage, rounded to a sensible step. Doing it for the whole catalogue at once keeps it consistent.
• Never sell below cost by accident: a rounding rule that cannot go under the buy price prevents it.
• Decide how to handle discounts (for example a percentage for a driver, or for one part) and write it down.

Record usage when it happens

The cheapest moment to record a part is when it is fitted. Give the mechanic a way to mark the part against the driver on a phone, even without signal in the paddock, and let the marks sync later. At the end of the weekend the usage is already there; nobody reconstructs it from memory on Sunday night.

Charge it and close the weekend

• Charge each driver for the parts used at the sell price, plus tyres, fuel and anything else on the weekend.
• Record payments as they arrive; the balance is what is charged minus what is paid.
• Close the weekend so that it is archived, and carry any balance (owed or credit) to the next one.
• Send each family a clear statement, not a screenshot of a spreadsheet.

Reordering without guessing

With stock counts that fall as parts are used, you can see what is low before the next race. Collect the shortages into one purchase order, and when the order arrives, receive it into stock so that the counts stay true.

A one-page checklist

• Catalogue with part numbers and prices (buy and sell).
• A margin rule and a rounding rule.
• Parts marked per driver at the moment of use.
• One settlement per weekend, built from those marks.
• Payments recorded, balance carried forward.
• Low-stock list turned into one order.