How Do I Choose a Reliable Supplier?
Choosing a supplier is a trade-off between price, how consistently they deliver on time, and how easy they are to work with — not simply whoever offers the lowest price.
Direct answer
Choosing a supplier is a trade-off between price, how consistently they deliver on time, and how easy they are to work with — not simply whoever offers the lowest price.
What to actually weigh
| Factor | Why it matters |
|---|---|
| Price | The most visible factor, but not the only one that affects what a supplier actually costs you |
| Lead time consistency | How reliably they deliver by when they say they will — this is the exact input your own reorder point depends on. An inconsistent supplier forces you to hold more safety stock than a reliable one would require, which ties up more cash than necessary |
| Minimum order requirements | A low price can be offset by having to buy more than you actually need at once |
| Payment terms offered | See Supplier Payment Terms and Cash Flow for why this matters beyond just the price tag |
Why lead time reliability matters more than it seems
A supplier who's occasionally cheaper but unpredictable about delivery timing can cost you more than the price difference suggests — every extra day of uncertainty is a day you need to hold more buffer stock to avoid running out, which is cash sitting on a shelf instead of being available elsewhere.
When to consolidate vs. spread purchasing across suppliers
Relying on one supplier can mean better terms and a stronger relationship, but leaves you exposed if something goes wrong on their end. Spreading purchases across a few suppliers reduces that risk, at the cost of more relationships and terms to manage. There's no universally correct answer — it depends on how much that risk actually matters for what you sell.
Why does my supplier keep letting me down?
Work through this rather than assuming the cause:
- Is this a one-off, or a repeating pattern? A single late delivery isn't necessarily worth acting on.
- Has your own order size or timing changed recently? Sometimes a supplier that was reliable for smaller, predictable orders struggles with a change on your end, not theirs.
- Has anything changed on their side that you're aware of — new ownership, a supply shortage, capacity issues?
A genuine, repeating pattern is worth weighing against the real cost and disruption of switching — a one-off usually isn't.