You finish the work on October 31. You submit the invoice November 1. It gets approved November 10. And then you wait. Net-30 vs net-60 is not an abstract contract clause. It is the gap between when you did the work and when the money actually lands in your account.
If you are corp-to-corp, that gap is yours to fund. Payroll, your own taxes, your mortgage, none of that waits for a client's accounts payable cycle. Understanding the real calendar math, not the marketing version, is what keeps a profitable contract from becoming a cash crunch.
Here is how to model it, where the traps hide, and when to push back before you sign anything.
Net-30 vs Net-60: What the Terms Actually Mean
Net-30 means payment is due 30 days after a reference date. Net-60 means 60 days. The trap is that the reference date is not always your work date. Read the contract language carefully. It usually says one of these:
- 30/60 days from invoice date — the clock starts when you submit, not when you worked
- 30/60 days from receipt or approval — the clock starts later, after someone signs off on your hours
- 30/60 days from end of month — common with monthly billing cycles, which adds up to 2-3 weeks before the clock even starts
Each of these changes your real cash gap by weeks. Vague language like "payment terms net-30" without specifying the start date is a red flag. Ask the vendor to clarify in writing before you sign.
The Calendar Math: A Real Example
Say you are a C2C consultant billing $85/hour, 40 hours a week, invoicing monthly. For October you bill roughly 176 hours, or $14,960.
| Step | Date | Net-30 Scenario | Net-60 Scenario |
|---|---|---|---|
| Work performed | Oct 1 - Oct 31 | Same | Same |
| Invoice submitted | Nov 1 | Same | Same |
| Invoice approved | Nov 10 | Same | Same |
| Payment due (30/60 days from invoice date) | - | Dec 1 | Dec 31 |
| Days from last day worked to cash in hand | - | ~61 days | ~91 days |
That is the clean version, assuming no approval delays and no vendor payment batching. In practice, add 3-10 business days for AP processing, ACH clearing, or a finance team that only runs payment runs twice a month. A "net-30" contract routinely pays out closer to 45-50 days after the work was done. A "net-60" contract can push past 100 days.
The Multi-Layer Problem
If you are two or three layers deep (prime vendor to sub-vendor to you), the delay compounds. The end client might pay the prime on net-45. The prime pays the sub-vendor on net-30 after that. If your contract with the sub-vendor also says net-30, you are not getting paid 30 days after you invoice — you may be getting paid 30 days after the sub-vendor itself gets paid.
Watch for "pay-when-paid" or "pay-if-paid" clauses. These tie your payment date to someone else's payment date, not a fixed calendar number. This is one of the few terms worth walking away from, or at minimum negotiating out, before you sign.
When to Push Back Before Signing
Payment terms are negotiable more often than consultants assume, especially in a tight talent market. Before you sign, ask:
- What is the exact reference date for the net terms — invoice date, approval date, or receipt date?
- Is there a pay-when-paid clause anywhere in the agreement?
- What is the typical real-world delay beyond the stated terms, based on past cycles?
- Can invoicing be switched to bi-weekly instead of monthly, cutting the float in half?
- Is there a mechanism to invoice as soon as a timesheet is approved, rather than batching to month-end?
A vendor unwilling to answer these clearly, or unwilling to put the reference date in writing, is telling you something about how they will behave once you are three weeks into the contract and still unpaid.
Bridging the Gap: What Invoice Factoring Really Costs
Some consultants use invoice factoring to bridge net-30 or net-60 gaps — a factoring company advances most of the invoice value immediately and collects the full amount from the client later. This is not free money. Typical factoring fees run roughly 1% to 5% of the invoice value per 30-day period, depending on your client's credit and payment history. On a $15,000 monthly invoice, a 3% fee is $450 off your top line, every single month you use it.
Factoring can make sense as a short-term bridge during a transition between contracts or a one-time cash crunch. It is a poor long-term substitute for negotiating better terms up front. If you find yourself factoring every invoice just to make payroll on your own S-corp, the real problem is the contract terms, not the lack of a factoring line.
A Quick Pre-Signing Checklist
- Confirm the exact start date for net-30/net-60 calculations, in writing
- Rule out or flag pay-when-paid language
- Ask for bi-weekly or semi-monthly invoicing if the role is monthly by default
- Build a cash reserve equal to at least one full payment cycle before starting any net-60 engagement
- Know your factoring cost in advance, even if you never plan to use it
Rate matters. Terms matter just as much. A high hourly rate on net-60 terms can leave you with worse cash flow than a slightly lower rate on net-15.
If you want a second set of eyes on a contract's payment terms before you sign, the team at Josh Pros LLC is happy to talk through it. Reach out at contact@joshpros.com or visit https://joshpros.com.
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