The most common number you'll hear for an agency referral fee is 10% — and it's often wrong for the deal at hand. Whether that number is too high or too low depends almost entirely on what the referred client is worth over time, not just at close.

Here's how to think through the structure before you agree to anything.

The decision that actually matters

Every referral fee comes down to two choices:

What's the base? — a flat dollar amount, a percentage of the initial contract, or a percentage of ongoing monthly revenue.
How long does it run? — one time, for the first contract term, or as long as the client stays.

Get these wrong and you'll either kill the deal (asking for too much) or spend a year regretting a flat fee when a client turns out to be worth $2,000/month for two years.

Flat finder's fees

The simplest structure: refer a lead, get paid once regardless of deal value.

Typical range: $50–$500, sometimes up to $1,000 for high-ticket project work.

When it works:

The deal is project-based, not recurring — a web build, a one-off campaign, event work.
The relationship is casual; neither party wants ongoing obligations.
The lead is genuinely low-value or uncertain.

The problem: flat fees systematically underprice retainer referrals. If you refer a client who turns into a $2,500/month retainer, no flat fee under a few hundred dollars reflects what you handed over. You did the acquisition, the trust-building, and the qualifying — and the closing agency collects the upside indefinitely.

Flat fees make sense for project work. For anything that might recur, there's a better structure.

Percentage of the first payment

Here the fee is a percentage of whatever the client pays at the start of the engagement — the first invoice, the project deposit, or month one of a retainer.

Typical range: 10–20% of the initial payment.

When it works:

The deal is large enough that a percentage is meaningful.
You're comfortable treating the relationship as a one-time event.

The limitation: if this is a retainer, all future payments are invisible to you. You've capped your upside at whatever the client paid on day one, no matter how long they stay.

Instead of a single payment, you receive a percentage of the client's ongoing spend for some defined window — typically 6 to 12 months.

Typical range: 5–20% of MRR, capped at 6–12 months.

Why the math favors this for retainer deals: a $2,000/month retainer at 10% revenue share over 12 months pays the referring agency $2,400. The same deal as a flat fee typically pays $100–$300. The closing agency keeps 90% of MRR and gains a fully qualified client with no acquisition cost. Both parties come out ahead compared to the flat-fee alternative.

Why the cap exists: indefinite revenue share creates problems. What happens when the client renews but the scope changes entirely? What if they churn and re-engage directly later? A defined cap — usually 12 months — keeps the arrangement clean. After the cap, the deal belongs to the closer fully.

Run your numbers before agreeing to anything. The revenue split calculator makes the math obvious: what you earn, what the closer earns, and how the deal changes across different percentage structures.

What counts as fair

There's no universal answer, but there is a useful framework: the referring agency's take should reflect the value they actually created.

What the referring agency typically brings:

Lead acquisition cost — ads, content, outbound, whatever generated the lead
Initial qualification — budget confirmed, need established
An implicit endorsement — the lead already trusts the referrer

What the closing agency brings:

Sales execution and close
Delivery and ongoing fulfillment
Long-term client relationship management

Given those contributions, a reasonable range for a referred retainer deal is 10–20% of MRR for 6–12 months going to the referring agency, with everything else to the closer who does the selling and runs the account.

At 10%, the referring agency recovers their cost basis on the lead. At 20%, they're being compensated for a warm, high-intent referral where the trust transfer is significant. Above 25% tends to feel punitive for the closer and strains the partnership over time.

What actually breaks these deals

The percentage matters less than what's written down. Referral arrangements go wrong for the same reasons every time.

No written terms. A handshake means trusting the closing agency to self-report revenue and pay on schedule with no obligation to do so. Most won't cheat you — but "most" isn't a business arrangement. Put something in writing before the lead changes hands. A lead-sharing agreement covers what you need: fee structure, cap duration, when the fee is triggered, and non-circumvention.

Ambiguity on when the fee is earned. Is it owed when the deal is agreed verbally? When the first invoice is sent? When it's paid? If this isn't defined, the first payout will produce a dispute.

No tracking mechanism. Recurring revenue share without a way to verify invoices is an honor system. That works until there's enough money on the table for a disagreement about what was actually paid.

No non-circumvention clause. Without it, nothing stops the closing agency from building a direct relationship and cutting you out after month one. This doesn't need to be aggressive — it just needs to exist. The lead-sharing agreement template includes it.

When to skip the manual arrangement

If you're referring leads regularly — because you're over capacity, working a different geography, or getting inbounds outside your service line — negotiating each deal individually gets old fast. Every new referral means re-hashing the conversation about percentages, writing a fresh agreement, and building tracking from scratch.

A lead-sharing network handles this at the infrastructure level: the split is set once when you list a campaign, routing is automatic by location, and payouts settle to your own account without chasing anyone. How agency revenue share works covers the specific mechanics of the three-way split. If you're still working through what to do with leads you can't close yourself, this breakdown of your options covers all four paths honestly.

The short version

Flat fees are simple but permanently cap your upside on retainer referrals.
Percentage of first payment is better, but still ignores recurring value.
10–20% of MRR for 6–12 months is a fair range for most agency-to-agency retainer deals.
The structure matters as much as the number — and none of it holds without something in writing.

Use the lead-sharing agreement template before you send the lead. Negotiating the fee after the fact is harder than it sounds.

What's a fair agency referral fee? Benchmarks and how to decide