If your stock lives in spreadsheets, you have probably asked this question already. The honest answer is that custom inventory software can cost anywhere from a few thousand dollars to well over a hundred thousand. The good news is that the price is predictable once you know what drives it.
The short answer
For a small or mid-sized distributor, a focused first version usually falls into one of three bands:
| Scope | What you get | Typical range |
|---|---|---|
| Starter | One warehouse, items, stock in and out, low-stock alerts, basic reports | $5,000 – $10,000 |
| Growing business | Several warehouses, transfers, barcode scanning on phones, roles, purchase orders | $10,000 – $25,000 |
| Operations platform | Integrations with accounting and e-commerce, approvals, customer portal, advanced reporting | $25,000 and up |
These are typical ranges for a studio that combines AI-assisted development with senior engineering review. Your own quote depends on the scope points below.
What actually drives the price
- Number of locations and stock movements. Transfers between warehouses, reservations and returns each add logic and testing.
- Roles and approvals. Who can adjust stock, who approves a write-off, who sees costs.
- Integrations. Connecting to accounting, e-commerce or shipping systems is often a third of the work.
- Data migration. Cleaning and importing years of spreadsheets takes real time.
- Mobile and offline use. Floor staff scanning barcodes in a warehouse with weak signal need offline-capable screens.
Custom software or an off-the-shelf tool?
Off-the-shelf inventory tools are cheaper to start and work well if your process matches theirs. Custom software makes sense when you have unusual units, several warehouses with their own rules, approval steps the tools do not support, or when per-user subscription fees start to add up as your team grows.
How to get a quote you can trust
- Write down your current process in plain steps: where stock comes from, where it goes, who touches it.
- List the reports you look at every week.
- Ask for a written scope and a fixed price, not an hourly estimate.
- Ask to see a working demo of something similar before you sign.
- Make sure you will own the source code and the data.
You can try our own multi-warehouse demo, StockFlow, to see what a first version looks like in practice.