Automotive parts inventory management

Inventory accuracy, percent of lines counted clean
87
Part numbers that did not match
39
Unit variance, counted less system
-60

Every figure on this page is computed from the inputs entered, by the method stated below it. Binstockly publishes no catalogue, no interchange table, no fitment data and no target margin: the usage, the lead times, the costs and the prices are yours, and the defaults are a worked example to replace with your own figures.

Automotive parts inventory management is a practice before it is a product, and the practice is four habits on a cycle. Count a slice of the shelf regularly rather than the whole thing annually, so accuracy is a live figure instead of a yearly surprise. Set reorder points from what each line actually sells and how long the supplier actually takes, and revisit them when either moves. Price from the margin the counter really takes after its discount rather than from the list, because the gap on the worked example is six points. And measure what the shelf costs to keep, in turns and in days on hand, so slow lines are visible before they are dead. Software makes each habit cheaper; none of them requires software to start. This guide sets out the cycle and the figure each habit produces, and every one of those figures is worked free by a sheet on this site with no account.

Open the Free auto parts inventory software Free to use. No account, no card, no trial clock.

Count on a cycle

A slice each week gives a rolling accuracy figure and a variance you can still trace to a cause. One annual count gives you a single number and no way of knowing when it went wrong. The stock count sheet works either, and returns accuracy, the unit variance and what it is worth.

Re-point and re-price

Reorder points drift as usage and lead times move; margins drift as costs rise and discounts get habitual. Both are four-input calculations. On the worked example the counter's real margin is 40% where the price list says 46%.

Watch turns and the tail

Turns and days on hand say what the shelf costs to keep; the dead stock share says how much of it has stopped earning. Four turns and 18% dead lines are the two numbers to trend, because they move slowly and then all at once.

Automotive parts inventory management: common questions

Where should a small operation start?

With a count of the fastest-moving hundred lines. They are where the money and the stockouts are, they are quick to count, and the accuracy figure you get is immediately actionable rather than a project.

How often should reorder points be reviewed?

Whenever usage or lead time visibly changes, and otherwise on a slow cycle. A supplier who has quietly slipped from seven to fourteen days has doubled the transit demand on every line they carry, and nothing else will tell you.

Do I need to write dead stock down?

That is an accounting judgement for you and your accountant, and this site publishes no rule. The dead stock sheet works out what a write-down at the percentage you name would cost and what it would return.

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Keeping what you make

The sheets are free forever. Pro turns them into the record: every part with its bin, cost, list price and last sold date, every count with its variance against the shelf it came from, every reorder against the supplier and lead time it assumed, your store's name and logo on the printed sheets, no watermark, and an export when the accountant or the buyer asks.

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On the worked example, the counter's real margin is 40% against the 46% the price list implies.

Free auto parts inventory software (Inventory accuracy, percent of lines counted clean): 87, Binstockly, worked example.

Cite as: "Automotive parts inventory management, Binstockly", updated 2026-09-04, https://binstockly.com/automotive-parts-inventory-management/.

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Inventory accuracy, percent of lines counted clean · Free auto parts inventory software · September 2026

87

Source: Free auto parts inventory software, Binstockly

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