Using vendor payment terms to fund your working capital

Every dollar you owe a supplier but haven't paid yet is a dollar working for you instead of for them. Your vendors are extending you credit, usually at no charge, and most founders barely notice it. That's a missed lever — because the gap between when you spend and when you actually pay is one of the cheapest sources of working capital you'll ever find.

Working capital is simply the cash you have available to run day-to-day operations — to make payroll, buy inventory, and cover the bills before your own customers pay you. When that cash is tight, the instinct is to chase a loan or a line of credit. But before you borrow at 9% or 12%, look at the financing already sitting inside your accounts payable.

Vendor payment terms — the "Net 30," "Net 45," or "Net 60" printed on an invoice — tell you how many days you have to pay after receiving goods or services. Net 30 means the full amount is due 30 days out. Those days are, in effect, an interest-free loan from your supplier. The longer the terms, the longer you hold your own cash.

How payment terms feed the cash conversion cycle

The cash conversion cycle is the number of days your money is tied up before it comes back as cash. In plain terms, it's how long you wait to collect from customers, minus how long you take to pay your suppliers. Stretch the second number and the whole cycle shrinks — meaning less of your own cash is locked up at any given moment.

Say your customers pay you in 40 days but your suppliers expect payment in 15. You're floating that 25-day gap out of your own pocket, every cycle. Push your supplier terms out to 45 days and you've flipped the math: now your vendors are floating you. The same revenue suddenly requires far less cash on hand to support it.

A worked example: $50k a month, Net 15 to Net 45

Imagine you spend $50,000 a month with one supplier on Net 15 terms. On any given day you're carrying roughly half a month of that bill as an outstanding balance — call it $25,000 of their money in your account. Now move that same supplier to Net 45. You're holding a full extra month of spend, so your average balance owed climbs by about $50,000.

That $50,000 doesn't appear from nowhere — it's cash you would have paid out sooner and now get to keep working in the business. It's a one-time, permanent boost to your working capital for as long as the terms hold, and it costs you nothing in interest. Do this across three or four major vendors and you can free six figures without touching a bank.

Negotiating better terms — and reading the discount math

Suppliers extend terms based on leverage and trust, so lead with what you can actually offer. The strongest cases combine several of these:

• Volume — you're a meaningful share of their revenue, or you're growing fast
• Reliability — a clean history of paying on time, every time
• Commitment — you'll sign a longer contract or guarantee minimum order levels
• Timing — you ask during their slow season, when they're hungry for the business

Watch for the flip side, though: early-payment discounts. A term like "2/10 Net 30" means you can take 2% off if you pay within 10 days instead of the full 30. Skipping that discount to hold your cash 20 extra days sounds clever, but the implied cost is steep. Paying 2% to keep your money for 20 days works out to roughly 37% on an annualized basis — far more than any line of credit. When a supplier offers a real discount like this and you have the cash, take it; the return beats almost anything else you could do with that money.

Don't trade a relationship for a few days of float

Stretching terms is a tactic, not a goal. The supplier who keeps your one critical part in stock, or ships overnight when you're in a bind, is worth more than the marginal cash you'd squeeze by paying them slowly. Pushing a key partner to the brink — late payments, constant renegotiation — can cost you priority, allocation, or the relationship itself.

So prioritize. Lengthen terms aggressively with large, commoditized vendors where you're easily replaceable as a customer and they're easily replaceable as a supplier. Pay your strategic partners promptly, especially when they're offering discounts that pay you to do so. The art is knowing which is which.

Pull your accounts payable list this week, sort it by annual spend, and flag your five biggest vendors. For each, write down today's terms and the terms you'd ask for — then start the conversation with the largest one. That single afternoon can free more cash than a quarter of cost-cutting.