Playbook
The Agency Cash Flow Playbook
The fastest way to fix agency cash flow is to collect before you deliver, so payroll never waits on a client's payment habits.
This agency cash flow playbook, published by Tim Kilroy, shows how established marketing and PR agencies can bill retainers ahead, tie project payments to calendar dates, sell prepaid sprints, and watch four numbers each month. It draws on Tim's cash flow guidance and planning workshop.
Published by Tim KilroyLast updated:
How do I stop cash flow swings at my agency?
Stop acting like your clients' bank. Many agencies close a deal, deliver the work, and then wait 45 days for payment while payroll lands every two weeks. Flip that order. Default to ACH autopay, drop “Net 30” from your terms, and bill for the next month before it starts.
The point is not to squeeze clients. It is to stop financing their growth with your payroll. See how this connects to pricing power in the agency positioning playbook.
What advance billing means
Definition
Advance billing, in the Agency Playbook Journal
Advance billing means collecting payment before the work is delivered, then recognizing that revenue month by month as the work is completed.
In Tim Kilroy's cash flow playbook, every prepayment sits in a deferred-revenue liability account and is recognized as work is done. You get the cash today, the client gets a clear ledger, and the balance sheet tells the truth. Confirm the accounting treatment for your agency with your accountant.
Which billing model is best for agency cash flow?
| Model | When cash arrives | Best for | Key terms |
|---|---|---|---|
| Retainer billed ahead | Before the service month | Ongoing work | Invoice the 15th to 20th, or ACH on day one; 30-day notice; auto-renew |
| Date-based milestones | On fixed calendar dates | Projects | 50/30/20 or 60/30/10, tied to dates, not approvals |
| Prepaid sprint pass | 100% up front | Short, fixed output | One-week or two-week pass at a fixed price |
| Fast-lane premium | On signature | Rush work | 25% extra with priority scheduling |
| Prepaid hour pack | Before hours are used | Irregular needs | 10, 25, or 50 hours; credits expire after 90 days |
For most agencies with ongoing clients, a retainer billed ahead does the heavy lifting. Milestones and sprints fit project work, and hour packs fit clients whose needs come and go.
Retainers that do the heavy lifting
Send the invoice on the 15th to 20th for next month's services, or charge ACH on day one of the service month. Explain it in capacity terms. A sample from the playbook: “We reserve a pod of three specialists and up to forty hours monthly. Holding that capacity blocks out other projects, so we collect in advance.”
Collect a setup fee plus the first month at signing, with a 30-day cancellation notice and auto-renewal. Clients secure senior talent; you secure predictable cash.
The numbers that make cash flow hard
- forecast-to-actuals variance commonly reported by finance leaders for teams on manual processes.
- 30 to 40%
- Source: Tesorio, cash flow forecasting software 2026
- of finance professionals still rely on spreadsheets as their main planning tool; 23% use AI in forecasting regularly (AFP 2025 FP&A Benchmarking Survey).
- 96%
- Source: Tesorio, cash flow forecasting software 2026
The lesson for agencies: a forecast built on hope misses. Billing ahead removes much of the guesswork because the cash is already in the account.
How to fix agency cash flow in five steps
Switch to ACH autopay
Make automatic payment the default on every new agreement.
Bill retainers a month ahead
Invoice mid-month for next month, or charge on day one of the service month.
Tie project payments to dates
Use a 50/30/20 or 60/30/10 schedule on calendar dates, not approvals.
Charge for rush work
Add a 25% fast-lane premium, collected on signature.
Watch four numbers monthly
Revenue against goal, expenses against budget, tax reserve, and real profit. The planning workshop suggests owner salary at 10 to 15%, tax reserve at 20%, and operating expenses at 50 to 60%.
Common questions
What is advance billing for agencies?
Advance billing means collecting before you deliver. Tim Kilroy’s cash flow playbook recommends ACH autopay by default, dropping Net 30 terms, and parking prepayments in a deferred-revenue liability account that is recognized month by month as work is completed. You get cash today and the client gets a clear ledger. Confirm accounting treatment with your accountant.
When should an agency invoice a retainer?
Invoice ahead of the work. The playbook suggests sending the invoice on the 15th to 20th for next month’s services, or charging ACH on day one of the service month. Pair that with a 30-day cancellation notice, auto-renewal, and a setup fee plus the first month collected at signing, so each month starts with cash in the bank.
How should agencies bill for projects?
Bill projects on milestones tied to calendar dates, not subjective client approval. The cash flow playbook uses 50/30/20 or 60/30/10 schedules, so if the client goes quiet for two weeks, the next payment still lands. For short fixed work, prepaid one-week or two-week sprint passes are paid 100% up front.
Should my agency charge a rush fee?
Yes, if rush work disrupts your schedule. Tim Kilroy’s cash flow playbook describes a fast-lane premium of 25% extra, collected on signature, with priority scheduling included. Rush jobs force your team to rearrange their week, so the premium pays for the disruption, and the full amount is collected before work starts.
How do prepaid hour packs work for agencies?
Prepaid hour packs let clients buy capacity in advance. The cash flow playbook describes 10, 25, and 50-hour packs at a slight discount, with credits that expire after 90 days and a monthly drawdown report. They suit clients with irregular needs, and they keep the agency from extending credit for work it has already delivered.
Which financial numbers should an agency owner watch?
Tim Kilroy’s 2026 planning workshop names four: revenue against goal, expenses against budget, tax reserve, and real profit. Its bucket guidance puts owner salary at 10 to 15% of revenue, the tax reserve at 20%, and operating expenses at 50 to 60%. Treat these as planning guidance and confirm the specifics for your agency with your accountant.
Want a second look at your agency's cash flow?
Tim Kilroy coaches established marketing and PR agencies on positioning, lead generation, and a repeatable way to win clients. Reach out through his contact page.
Contact Tim Kilroy