The Three Ways Small Practices Pay for Medical Billing
If you run a practice with one to three providers, figuring out the medical billing cost for a small practice comes down to three basic choices: pay a billing company a percentage of what they collect, pay a flat monthly fee, or hire someone in-house to do it. Each option has a different math problem hiding inside it, and each one rewards different behavior from whoever is doing your billing.
Before we get into numbers, it helps to define one term. Collections is the actual money that comes in the door from insurance and patients, not the amount you originally billed. A percentage-of-collections model is priced off that real number, not your fee schedule.
Percentage of Collections: What It Rewards and Hides
This is the most common pricing model for outsourced billing, especially for small practices. Many billing companies advertise rates in the range of roughly 4 percent to 9 percent of monthly collections, though the exact number moves depending on your specialty, claim volume, and how much work is bundled in, such as coding, patient statements, and credentialing.
Here's what this model gets right. The billing company only makes money when you get paid, which aligns their interest with yours on the easy stuff, clean claims, common codes, standard payers, routine follow-up.
Here's what it can hide. A percentage fee does not automatically mean someone is chasing your hardest, oldest, or most complicated claims. A large denied claim that takes six phone calls to fix pays the same percentage as an easy batch of claims that took no effort at all. Some billing companies quietly deprioritize the hard ones because the effort to reward ratio is worse for them. That's part of why practices are often surprised by their real denial rate and aging accounts receivable, meaning money owed to you that hasn't been collected yet, even while paying a company that looks successful on paper. We wrote a longer breakdown of what actually drives denials in Why Are My Insurance Claims Being Denied? 5 Real Causes, worth a look if your denial rate feels high but nobody can explain why.
Example, purely illustrative: say your practice collects 100,000 dollars a month and pays a 6 percent rate. That works out to 6,000 dollars a month. If your denial and follow-up work is genuinely being handled well, that can be a fair trade for not hiring staff. If it isn't, you're paying full price for partial effort.
Flat Fee Billing: What It Rewards and Hides
A flat fee model charges a set monthly amount regardless of collections, sometimes per provider, sometimes based on claim volume tiers. It's less common for very small practices but shows up more as claim volume grows or when a practice negotiates hard against percentage pricing.
What it rewards is predictability. You know your cost every month no matter what happens with payers. It also removes the built-in incentive problem above, since the company isn't paid more for easy claims and less effort on hard ones, at least in theory.
What it hides is volume creep. If your patient volume grows and your flat fee doesn't, the billing company is doing more work for the same money, which is exactly the incentive to start cutting corners on follow-up, appeals, and patient statements. Ask directly what claim volume the flat fee assumes and what happens once you exceed it.
In-House Billing: The Real Salary Math
Hiring an in-house biller feels like control, and it can be. But the true cost is rarely just the salary line. A realistic in-house cost picture usually includes:
- Base salary and payroll taxes, which vary widely by region and experience level.
- Benefits, if you offer them.
- Software costs, including your practice management system and a clearinghouse fee, the middleman service that submits claims electronically to insurance payers.
- Training time, especially for prior authorization rules, payer-specific quirks, and coding updates.
- Coverage gaps for vacation, sick days, and turnover, during which claims and follow-up simply stall.
The coverage gap is the one practices underestimate most. One person handling billing for a one-to-three-provider practice means your entire revenue cycle has a single point of failure. When that person is out for two weeks, claims don't stop happening, they just pile up.
In-house billing also tends to hide the cost of denials and prior authorizations that never get worked because your biller is buried in day-to-day tasks. For a closer look at what an unworked denial actually costs beyond the obvious, see What Does a Denied Claim Really Cost Your Practice?
Red Flags in Billing Contracts
Whether you're comparing percentage or flat fee proposals, a few contract terms deserve extra scrutiny before you sign anything:
- Vague scope language. Does the fee include coding, patient statements, credentialing, and appeals, or are those billed separately?
- Long auto-renewal terms with short cancellation windows. A contract that auto-renews annually but only lets you cancel with 90 days notice can trap you in a bad relationship for a long time.
- No reporting cadence in writing. You should get regular reports on collections, denial rates, and aging accounts receivable, not just a monthly invoice.
- Fees charged on billed amounts instead of collected amounts. That's a very different, more expensive number than a true percentage of collections.
- Unclear data ownership. Make sure your claims history and patient billing records transfer cleanly if you ever switch vendors.
So What Should You Actually Pay?
There's no single right number, because the honest answer depends on your claim volume, specialty, payer mix, and how much of the revenue cycle you're outsourcing. What matters more than the exact percentage or flat fee is whether the pricing model matches the effort you're actually getting, and whether you can see that effort in reporting instead of just trusting it.
This is part of why AI is starting to enter this conversation. AI agents built for revenue cycle work can handle repetitive follow-up, eligibility checks, and claim status monitoring at a consistent pace regardless of volume spikes or staff turnover, which changes the math on both the percentage and flat fee models. We've written more about where this technology actually stands today, and where it doesn't, in How AI Is Transforming Medical Billing in 2026.
If you're not sure whether your current billing cost lines up with what's actually happening to your claims, that's worth checking before you renegotiate or switch anything. We built a free Billing Health Check at audit.getautomatedrcm.com that looks at your denial patterns and AR aging so you're negotiating from facts instead of guesses.
Frequently Asked Questions
How much does a small medical practice typically pay for billing services?
Small practices most often see outsourced billing priced as a percentage of monthly collections, with advertised rates commonly falling somewhere in the mid-single-digit to high-single-digit percent range depending on specialty and scope of work. Flat monthly fees and in-house salaries are the other two common models, and the right cost depends on your claim volume and how much of the work is included.
Is percentage of collections or flat fee better for a small practice?
Percentage of collections aligns the billing company's pay with your revenue, which works well if they're actually chasing hard and easy claims equally. Flat fee gives you predictable monthly costs but can encourage cut corners if your volume grows faster than the fee does, so the better choice depends on your claim volume and how closely you can monitor denial and follow-up performance.
What is a fair percentage rate for outsourced medical billing?
There's no universal fair rate because it depends on specialty, claim complexity, and what services are bundled in, such as coding, patient statements, or credentialing. Instead of chasing a specific percentage, compare what's included in the fee and ask for regular reporting on denial rates and aging accounts receivable so you can judge whether the rate matches the actual effort.