What Is a Referral Fee and How Does It Work in Construction?

A referral fee is a payment made to someone who sends a new customer to a business. In the construction and trades industry, referral fees happen constantly — but they're rarely formalized, rarely tracked, and rarely paid.

This guide covers everything contractors need to know about referral fees: what they are, how they're structured, what's standard in the industry, and how to set one up so that both parties actually follow through.

The basic definition

A referral fee is compensation paid to a referring party when that referral results in a completed business transaction. In construction, that typically means: you send a customer to another contractor, that contractor does the job, and you receive a percentage of the job value as payment for the introduction.

Referral fees go by several names in the trades:

• Referral fee
• Finder's fee
• Introduction fee
• Referral commission
• Lead fee

They all mean the same thing: you sent the customer, you get paid when the job closes.

Are referral fees legal in construction?

In most cases, yes. Referral fees between contractors are generally legal in the United States, including in Arizona. Unlike some licensed professions (like real estate, where referral fees are heavily regulated), contractor-to-contractor referral fees operate in a much more open space.

The main legal considerations are:

• Disclosure to the customer. In some states and situations, you may be required to disclose to the customer that a referral fee is involved. This varies by state and context.
• Licensing restrictions. Some contractor license types have restrictions on fee-splitting. Check your specific license type if you're unsure.
• Written agreements. A written referral agreement protects both parties and makes the arrangement enforceable.

For the vast majority of trade-to-trade referrals — a plumber sending a customer to an electrician, a roofer sending a customer to a gutter company — referral fees are straightforward and legal.

How referral fees are structured in construction

There are two common structures for contractor referral fees:

Percentage of job value

The most common structure. The referring contractor receives a percentage of the total job value when the project completes. Standard percentages in the construction trades range from 5% to 10%, though some trades and relationships use higher or lower rates.

Examples:

• $4,000 electrical job at 8% = $320 referral fee
• $15,000 roofing job at 5% = $750 referral fee
• $2,500 HVAC service call at 10% = $250 referral fee

Flat fee per referral

Some contractors prefer a flat fee per completed job, regardless of size. This is simpler to administer and works well when job sizes are relatively consistent. Common flat fees range from $100 to $500 depending on the trade and typical job value.

What makes a referral fee agreement work

Most referral fee agreements fail — not because the contractors are dishonest, but because there's no system. Here's what a working referral fee arrangement requires:

• Agreement upfront. Both parties agree to the fee structure before any referrals are sent. Not after the first job closes — before.
• Tracking. Every referral is documented: who was referred, when, what they need, and to which partner.
• Notification at completion. The referring party is notified when a job completes and what the final value was.
• Automatic calculation. The fee is calculated based on the agreed percentage, with no room for interpretation or dispute.
• A record. Both parties have a permanent record of every referral sent, received, and completed.

The referral fee isn't the hard part. The hard part is the system. Most contractors skip the system and then wonder why fees never get paid.

The difference between a referral and a lead

A lead is a potential customer. A referral is a personal introduction — your name goes with it. This distinction matters for two reasons:

First, referrals convert at a much higher rate than cold leads. When a customer is sent by someone they already trust, they're far more likely to call, book, and follow through. Your referral is worth more than a lead from a directory.

Second, your reputation goes with every referral you send. If your partner drops the ball — slow to respond, poor workmanship, unprofessional — your customer will blame you for recommending them. That's the accountability that makes referral fees worth something: you're not just sending leads, you're vouching for someone's work.

How to set up a referral fee arrangement with another contractor

Setting up a referral fee arrangement is simpler than most contractors think. Here's the process:

• Choose your partners carefully. Only set up referral agreements with contractors whose work you'd genuinely recommend. Your reputation goes with every referral.
• Have the conversation directly. "Hey, I send you a few customers a year. I'd like to formalize that and set up a referral fee arrangement." Most contractors will say yes immediately.
• Agree on the percentage or flat fee. 5–8% is a reasonable starting point for most trades. Make sure both parties agree before any referrals are sent.
• Use a tracking system. Whether it's a spreadsheet or a platform like Referly, make sure every referral is documented and both parties can see the status.
• Set expectations for notification. Agree that the receiving contractor will notify you when a referred job completes and what the final value was.

Why most referral fee agreements fail

The most common reason referral fees don't get paid is simple: there's no paper trail. The referral happened over a text message. The job closed. Nobody tracked it. Nobody followed up. And months later, both contractors have moved on.

The second most common reason: it feels awkward to bring up money with someone you have a personal relationship with. Asking your buddy who's also your electrician to cut you a check for a referral you sent him six months ago is uncomfortable. Most contractors just let it go.

The solution to both problems is a system that handles tracking and calculation automatically — so the fee is just there when the job closes, with no awkward conversation required.

Referral fees vs. subcontracting

Referral fees and subcontracting are different arrangements. In subcontracting, you bring a trade onto your job and you're responsible for their work. You're managing the project and marking up their services. In a referral arrangement, you're simply introducing a customer to another contractor. You're not part of the project, not responsible for the outcome (though your reputation is tied to it), and not marking up the work.

The distinction matters for tax and liability purposes. Referral fees are income to the receiver and an expense to the payer, but the arrangements are much simpler than subcontracting from a legal and administrative standpoint.

Getting started

If you're ready to start formalizing your referral relationships, the first step is identifying the contractors you already refer regularly and reaching out to set up an agreement. Most of those conversations will take less than ten minutes — and the income potential over the next year is significant.

Referly is built to handle the tracking, notification, and fee calculation automatically so you can focus on the work and let the referral income take care of itself.