# Fishbowl: Cost value must be positive

> You entered a negative value in a cost field where only positive values are allowed.

## What it means
You're trying to enter a negative value in a cost field. Fishbowl doesn't allow negative costs—any cost amount must be zero or positive. This usually happens when entering a unit cost, average cost, or similar costing value.

## What to check
- Verify the value you entered: check whether a negative sign got included unintentionally
- If you meant to enter that value, confirm whether you actually need a positive number
- If you're trying to reverse or adjust a cost, look for an adjustment or reversal transaction type instead of entering a negative value

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*From Israel Lopez Consulting (ILC). Custom Fishbowl Inventory integrations and software, and Fishbowl experts since 2015. Written by Israel Lopez. Questions about this topic, or want to reach the people who wrote it? Visit https://israellopezconsulting.com/contact*