Payment terms are one of the most under-negotiated levers in agency contracts. Most agencies inherit Net 30 from a template they downloaded years ago, and never revisit it. The difference between Net 15 and Net 45 across a $4M annual revenue book can be more than $300,000 in working capital tied up in receivables. That is the difference between hiring two senior people now or waiting another year.
Key Takeaways:
- Net 15 is operationally achievable for the majority of mid-market clients if presented as standard
- Average days sales outstanding (DSO) is typically 8 to 12 days longer than the stated payment terms
- Enterprise clients on Net 45 or Net 60 are not always non-negotiable; many will accept Net 30 if asked
- Late fees rarely get collected but consistently shift behavior when written into contracts
- Payment term changes apply to new contracts only; do not retroactively change existing client terms
This guide breaks down the practical tradeoffs of Net 15, Net 30, Net 45, and Net 60, when each makes sense, how to negotiate, and how to structure terms to actually get paid on time.
What Payment Terms Actually Mean (Including Hidden Variation)
"Net 30" sounds simple: payment due 30 days from the invoice date. In practice, payment terms have hidden variations that change cash flow significantly.
- Net 30 from invoice date: Standard. The most common interpretation.
- Net 30 from receipt of invoice: Adds 2 to 7 days because the client controls when they "received" the invoice.
- Net 30 EOM (end of month): Due 30 days after the end of the month the invoice was issued. An invoice on March 3 would be due April 30, not April 2. Adds an average of 15 days.
- 2/10 Net 30: Pay within 10 days for a 2 percent discount; otherwise full amount due in 30. Common in B2B but rare in agency work.
Always specify "Net X from invoice date" in your contracts. Avoid EOM unless you really intend it.
Net 15: When It Works
Net 15 should be your default for new agency contracts. It works in roughly 70 to 80 percent of cases when presented as standard.
Best fit:
- Clients under 500 employees with a single AP person
- Owner-led businesses, marketing agencies, professional services firms
- Project work, retainers, and consulting engagements where the buyer is also a senior decision maker
Where it fails:
- Enterprise procurement (typically 500+ employees) with mandated payment terms
- Government, public sector, and education clients (often Net 45 to Net 90 by policy)
- Clients on tight cash themselves who will simply pay late regardless of terms
Practical impact: A switch from Net 30 to Net 15 across new contracts pulls 12 to 18 days out of your DSO over the following 12 months, which translates to 3 to 5 weeks of additional working capital for a typical agency.
Net 30: The Default That Isn't
Net 30 is what most agencies use because it is what the template said. It is the safe middle ground, but worth examining whether you actually need to be there.
Best fit:
- Mid-market clients (500 to 2,000 employees) where the AP team has standardized terms
- Long-tenured client relationships where you have already negotiated other concessions
- Industries where Net 30 is genuinely the procurement norm (consumer brands, mid-market SaaS)
Realistic DSO: Net 30 contracts typically pay in 38 to 45 days, not 30. Build that into your cash forecast.
Tactical note: If you are on Net 30 and the client consistently pays at day 42, ask them to either pay closer to terms or move officially to Net 45 with a price adjustment. Most clients pick option 1.
Net 45 and Net 60: Enterprise Reality
Larger enterprise clients (3,000+ employees) frequently require Net 45 or Net 60 as a procurement policy. This is real, but less universal than vendors believe.
When it is genuinely required:
- Fortune 1000 companies with formal procurement systems
- Government contracts (often Net 60 to Net 90)
- Large healthcare and financial services organizations
- Companies acquired by private equity in the last 24 months (PE often standardizes vendor terms to maximize working capital)
When it can be negotiated:
- The procurement standard is Net 60 but the business owner has authority to override
- You are a strategic vendor (top 5 in your category for them)
- You are willing to trade longer terms for higher pricing
- The contract is small enough that procurement has not bothered to enforce policy
The pricing tradeoff: If a client insists on Net 60, raise pricing by 4 to 7 percent to compensate for the working capital cost. Frame it as: "Our standard pricing assumes Net 15 payment. Net 60 reflects an additional 45 days of working capital, which is reflected in the adjusted rate."
How to Negotiate Payment Terms
Most agencies never actually negotiate payment terms because they don't know they can. Here is what works:
At Initial Contract
State your terms as standard, not as a request. Compare:
"Our payment terms are Net 30. Let us know if that works."
Versus:
"Our standard payment terms are Net 15 from invoice date, with a 50 percent deposit on signing. We have moved to these terms across our client base to keep our team focused on your work rather than collections. Please confirm this works on your end."
The second framing positions Net 15 as the default, requiring effort to deviate from. It is accepted at significantly higher rates.
When Procurement Pushes Back
If procurement counters with Net 30 or Net 45, have a fallback structured ahead of time:
- Trade for deposit. "We can move to Net 30 with a 50 percent deposit on signing."
- Trade for upfront payment. "We can move to Net 30 if the first invoice is paid in advance."
- Trade for pricing. "Net 45 reflects additional working capital cost; pricing adjusts by 5 percent."
- Trade for early payment discount. "Net 30 is fine; we offer a 1.5 percent discount for payment within 10 days."
About 80 percent of procurement teams will accept option 1 or 2.
At Contract Renewal
Renewal is the single best time to update terms. Send the proposed renewal with new terms:
As part of our updated agreement, our standard payment terms have moved to Net 15. We are happy to discuss any concerns this raises with your AP team.
Most clients renew without comment. Those who push back are negotiating, not refusing.
Late Fees: Useful Even If You Never Collect
Late fees are powerful behavior shifters even when you rarely actually collect them. Industry data suggests fewer than 1 in 5 agencies who include late fees in contracts actually invoice them, but contracts that include late fees see 15 to 25 percent fewer late payments.
Standard structure:
- 1.5 percent per month (18 percent annualized) on past-due balances
- Applied to invoices more than 30 days past due
- Notice of late fees included in the day-30 reminder email
Implementation:
- Always include in the contract, even if you waive in practice
- Apply consistently for new clients in the first 12 months (this trains them)
- For long-term strategic clients, you can waive while still naming the policy in the contract
The point of late fees is not the fee revenue. It is the implicit message that you are an organized vendor who tracks payments rigorously, which by itself moves you up the AP queue.
Industry Norms by Agency Type
Different agency categories cluster around different terms:
- Branding and design agencies: Net 15 to Net 30, often with 50 percent deposits
- Performance marketing and paid media: Net 15, with media spend frequently billed weekly or pre-funded
- Web and software development: Milestone-based with Net 15, sometimes with progress payments
- PR and communications agencies: Monthly retainers billed on the 25th of the prior month, Net 15
- Strategy consulting: Net 30 standard, milestone-based for engagements over $250K
- Production companies (video, photo): Net 15 with pre-production deposits of 30 to 50 percent
If you are pricing or structuring at terms looser than peers, you are likely leaving working capital on the table.
Operationalizing Better Terms
Better terms only matter if you actually enforce them. The operational backbone:
- Send invoices the same day work completes or on the contracted billing schedule, not when convenient
- Use recurring billing for retainers so monthly invoices generate automatically
- Include payment links (ACH, card) on every invoice
- Have a documented AR cadence (see our AR management guide)
- Track DSO weekly as a leading indicator
- Review payment terms annually in your contract review
Use the invoice generator to standardize your invoice format and the client lifetime value calculator to evaluate which clients are worth the working capital cost on longer terms.
When to Walk Away from Bad Terms
Some prospective clients will demand Net 60 or Net 90 with no flexibility. The math:
- A $200,000 annual contract at Net 60 ties up roughly $33,000 of working capital
- A $200,000 contract at Net 90 ties up roughly $50,000
For large strategic engagements, that may be worth absorbing. For smaller engagements, especially on lower-margin work, the working capital cost can eliminate the project's profit. Run the math through the profit margin calculator before accepting onerous terms.
If a small client demands Net 90 with no upside, decline. If a large strategic client demands Net 60, price it accordingly and get a deposit.
Putting It Together
The simplest payment terms framework that works for most agencies:
- New contracts default: 50 percent deposit, balance Net 15
- Mid-market negotiation fallback: 30 percent deposit, balance Net 30
- Enterprise: Net 30 with progress payments, or Net 45 with a 5 percent pricing adjustment
- Late fee policy: 1.5 percent per month after 30 days past due, included in every contract
Implement this on every new contract starting today. Revisit existing contracts at renewal. Within 12 months, your DSO will fall by 10 to 20 days and your need for a working capital line will shrink correspondingly.
For more on cash flow strategy, see our guides on 10 ways to improve agency cash flow immediately and agency cash flow management.
Ready to put structured billing, automated reminders, and clear payment tracking in one place? Book a demo of AgencyPro to see how leading agencies handle billing and AR.