Stock Aging Calculator (Kenya)

This stock aging calculator estimates how long your stock has been sitting, in days, and the cash tied up in it, so you can act on old stock before it becomes a loss.

By Veira Team, Kenya SME toolsPublished June 2026Updated June 2026
Calculator
Result
Stock is sitting about 40 days on average
Days of stock on hand40 days
Cash tied up in stockKES 400,000
VerdictWatch: stock is sitting over a month

Days of stock = value on hand divided by daily cost of goods sold. The longer stock sits, the longer your cash is frozen and the higher the risk of expiry, damage or obsolescence. Old stock is the first place to free up cash.

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Old stock is frozen cash

Every shilling sitting in stock is a shilling you cannot use elsewhere. Stock aging measures how long, on average, that cash stays frozen before it sells.

The longer stock sits, the more it risks expiry, damage or simply going out of fashion. Watching the average and acting on the oldest lines, through discounts or bundles, keeps your working capital moving instead of gathering dust.

Worked examples

A general shop
  • KES 400,000 stock against KES 300,000 monthly cost is about 40 days.
  • Stock is sitting over a month: worth watching the slowest lines.

Frequently asked questions

What is stock aging?
It is how long your stock sits before it sells, on average, measured in days. It shows how long your cash is frozen in inventory and how much risk of expiry or obsolescence you carry.
How do I calculate days of stock?
Divide the value of stock on hand by your daily cost of goods sold (monthly cost divided by 30). The result is roughly how many days your current stock will last at the current pace of sales.
How many days of stock should I hold?
It depends on your supplier lead times and shelf life, but lower is generally better for cash flow. Holding far more than your lead time requires usually means cash is frozen unnecessarily.
What do I do with old stock?
Clear it. Discount it, bundle it, or promote it to free the cash, and stop reordering slow lines. Old stock rarely improves with age; it more often becomes a total loss.
How does Veira help?
Veira tracks how long each product has been in stock and flags slow movers, so you act on aging stock before it expires or ties up cash you need.

Business reviews

4.8
Based on 4 reviews
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Jane M.
Verified business

Finally a tool that gets Kenyan tax rules right. Zero KRA rejections since using this.

5/10/2024
Noor A.
Verified business

Accurate and saves me hours every month. The breakdown is clear and my staff finally understand their deductions.

5/20/2024
Ahmed H.
Verified business

Exactly what I needed. Calculated costs before ordering and saved a fortune on import duties.

5/15/2024
David K.
Verified business

Very helpful. Only thing missing is export to CSV but overall excellent.

5/5/2024

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