Payment terms are part of the price. Thirty days to pay is worth roughly a month of the cost of capital on the order value, and a supplier offering it has made a credit decision about you rather than a gesture of goodwill.
This guide covers the three arrangements a practice is likely to meet, what each costs, and what a supplier is weighing when they decide.
Prepayment
Money leaves before material arrives. It is the default for a first order everywhere in this market, and it is not a judgement about the buyer: a supplier with no order history has no basis for extending credit and a research-material order is difficult to recover once shipped.
The cost to you is the cash tied up between payment and use, plus the risk that the order is wrong. That second cost is why a first order is a bad time to buy a large quantity.
Net terms
Net-30 means the invoice is due thirty days from a stated date, usually the invoice date rather than the delivery date. Those are not the same and the difference matters on a made-to-order item with a long lead time. Read which one the invoice states.
| Arrangement | When money leaves | What it costs the buyer | What the supplier is deciding |
|---|---|---|---|
| Prepayment | Before shipment | Cash tied up, plus risk on a first order | Nothing, this is the no-decision option |
| Net-15 / Net-30 | Fixed days after invoice | Little, if paid on time | Whether your order history supports credit |
| Credit line | Against an agreed limit | Interest only if it revolves | Your financial standing, usually formally |
| Deposit plus balance | Split across the run | Partial, common on made-to-order | Shared risk on a batch made for you |
Four arrangements, and what each party is actually exposed to under them.
What a supplier looks at before offering terms
- Order history. Several orders paid on time is the strongest signal available and the one most suppliers weight hardest.
- Order size relative to the limit requested. A request for terms far above your typical order reads as a change in the relationship rather than a convenience.
- Whether the entity ordering is the entity paying. Mismatches here are the single commonest cause of a declined application.
- Verifiable business details, which is most of what the account application is for.
Early payment discounts
A term written as 2/10 net 30 offers two percent off if paid within ten days, otherwise the full amount at thirty. Taking it is usually worth more than it looks: two percent for paying twenty days early is a very high annualised return on the cash, far above what the money earns sitting still. If the discount is offered and the cash is available, take it.
What a late payment actually costs
More than the relationship, which is the part most buyers weigh. A late payment on a research-material account typically removes terms, and terms are rarely restored at the same level. The practical consequence is that a single missed invoice converts an account back to prepayment, which ties up cash on every subsequent order rather than on one.
Where a payment will be late, saying so before the due date generally preserves the arrangement. Saying nothing and paying late generally does not, because the supplier learns the same fact in the worse order.
Who should be on the account
Two names, not one. An orderer who can place and query orders, and a finance contact who receives invoices and settles them. Practices routinely open accounts with a single contact because one person does both jobs today, and it is the commonest reason an invoice goes unnoticed until it is overdue.
The separation also matters for control. A single person who orders, receives and pays has no second pair of eyes anywhere in the chain, which is a weakness in the record before it is a weakness in the finances. Chain of custody inside a practice covers the receiving side of the same point.
What terms do not change
Nothing about terms alters what you are buying. A generous arrangement from a supplier whose certificates are not lot-matched is a cheap way to acquire material you cannot trace. Settle documentation first and terms second, which is the order argued in comparing suppliers on documentation.
This is one part of buying wholesale. Wholesale peptides for clinics covers the whole process from evaluating a supplier to placing a first order.