In the previous article, we looked at lead time: how long you wait between placing an order and receiving goods.
But lead time shows only the physical movement of goods. It does not show the movement of money.
And in inventory-based businesses, money matters just as much as goods, especially when it is limited.
This is why payment terms deserve far more attention than they typically receive.
They define when you actually part with cash, and this timing can dramatically change the financial impact of an otherwise identical purchase decision.
Payment terms change the financial meaning of lead time
Imagine two suppliers offering the same product, at the same price, with the same 8-week lead time. Operationally, they look identical. Yet depending on payment terms, the financial reality can be completely different.
Here are typical variations:
- •Prepayment – cash leaves immediately
- •Partial upfront + partial before dispatch – cash leaves twice
- •Payment after dispatch – cash leaves near the end of lead time
- •Payment after delivery – cash leaves only once goods arrive
Lead time stays the same.
But your cash position changes dramatically.
Simple example
Supplier A: 100% prepayment
Supplier B: payment after dispatch
Lead time: identical (8 weeks)
Physically: no difference.
Financially:
- •With Supplier A, your money is locked for the full 8 weeks.
- •With Supplier B, your money remains available almost until the goods are ready to ship.
This available capital can:
- •replenish fast-moving SKUs
- •reduce the risk of stockouts
- •decrease borrowing needs
- •or simply strengthen liquidity
This is why comparing suppliers only by price and lead time can be misleading.
What really matters is when the money leaves your account.
In finance, this timing is often expressed through DPO (Days Payable Outstanding).
DPO shows how many days pass between receiving goods and paying your supplier.
In e-commerce, however, DPO is frequently very low or even negative, because cash may leave your account long before production begins or goods are dispatched.
Prepayment, deposits, or large upfront instalments effectively mean that your financial cycle starts earlier than your operational cycle — a detail most dashboards never show, but it has a direct impact on your cash flow forecast.
Where the timelines actually connect
Operational systems often store lead time and payment terms as separate variables. From a data perspective, this makes sense. But in practice the two timelines are rarely independent.
Payment obligations are usually triggered by operational events such as:
- •purchase order confirmation
- •production start
- •shipment dispatch
- •delivery
These events are themselves part of the lead-time process.
This means that even though payment terms are defined contractually, the moment when cash actually leaves the business is frequently anchored to operational milestones.
For example:
- •a 30% deposit may be required when the order is confirmed
- •the remaining 70% may be due before shipment
- •or payment may occur a certain number of days after dispatch
In all these cases, the financial timeline is implicitly tied to the operational one.
This is why payment terms cannot be fully understood in isolation.
They only become meaningful once you look at when the triggering event occurs inside the lead-time timeline.
Ignoring this link often leads to underestimating how long capital is actually locked in the purchasing cycle.
Lead time and payment terms must be evaluated together
Lead time describes: when the goods arrive.
Payment terms describe: when you pay for those goods.
These are two separate timelines, and only by looking at them together you can understand how long your working capital is effectively committed.
- •With early payment, long lead time greatly increases the period your capital is tied up.
- •With late payment, long lead time may have almost no impact on capital lock at all.
- •With payment after delivery, lead time affects operations, but not the timing of the cash outflow.
Understanding this distinction is essential for evaluating supplier attractiveness, estimating expected return on your investment and making financially sound replenishment and allocation of capital decisions.
Why operational tools never reveal this
Most restock tools focus on the physical cycle:
- •sales velocity
- •stock levels
- •inbound shipments
- •days of supply
- •lead time
But they do not include:
- •payment terms
- •timing of cash outflow
- •the period during which your capital is unavailable
As a result, sellers often make decisions that look correct operationally, while missing significant financial implications.
A supplier with slightly worse price or longer physical lead time may still be the superior choice if their payment terms allow cash to stay available longer.
A supplier with attractive unit economics may quietly weaken your liquidity if cash leaves too early.
The bottom line
Payment terms are not a small contractual detail. They are a financial variable that directly shapes:
- •how long your capital is committed
- •how flexible you remain during the replenishment cycle
- •and how efficiently you can run your overall inventory strategy
Lead time tells you when the goods move. Payment terms tell you when the money moves.
Both must be evaluated together.
Ignoring payment terms can lead to decisions that appear optimal operationally but reduce capital efficiency in practice.
In the previous article, Making Better Restocking Decisions When Capital Is Limited, we looked at why capital constraints turn restocking into a comparative decision rather than an isolated one.
In the next article, Settlement Cycles: Why "Fast Sales" Don't Always Mean Fast Cash, we'll look at when and how cash returns after the sale through marketplace settlement cycles.