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iRCM is an industry leader with innovative technology and an expert team. We are a complete Revenue Cycle Management solution that streamlines reimbursements and delivers remarkable results.
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iRCM is an industry leader with innovative technology and an expert team. We are a complete Revenue Cycle Management solution that streamlines reimbursements and delivers remarkable results.
You are comparing medical billing companies. Every one of them quotes you a different number. Some want a percentage of what they collect. Others want a flat fee no matter what they collect. Neither answer tells you which one actually protects your bottom line.
Here is the short version. Percentage based billing rewards performance but grows with your revenue. Flat fee billing protects your budget but can quietly punish you on service quality. The right choice depends on your collections, your specialty, and how much risk you can absorb while your billing partner figures out your payer mix.
Let’s walk through both models the way I would walk a client through them before they sign anything.
Flat fee billing means you pay a fixed amount no matter how much your practice collects that month. It comes in two forms. A flat monthly fee, usually somewhere between $500 and $2,500 a month for small to mid sized practices, sometimes reaching $1,500 to $5,000 for larger scope or higher provider counts. Or a flat fee per claim, typically $3 to $12 per claim depending on complexity and payer type.
You know your cost going in. Your accountant loves it. The catch shows up in the fine print, which we’ll get to.
Percentage based billing means your billing company takes a cut of what they actually collect for you. Not what they bill. What lands in your account. Rates in 2026 run from 4% to 10% of net collections, with most competitive quotes for small to mid sized practices landing between 5% and 8%.
Your specialty moves that number. Cardiology, oncology, and orthopedic surgery can push past 10% into the 10% to 12% range because those claims carry more coding complexity, more prior authorization work, and more denials to fight.
Solo practices pay the most as a percentage. Recent industry data shows solo practices paying somewhere around 10% to 12% of total collections when outsourcing, and a separate AMA survey put the average for solo practices closer to 10.9%. Larger groups negotiate down. Multi location practices with ten or more providers often land between 4% and 7% because volume gives them leverage.
Say your practice collects $100,000 a month.
At 6% percentage based billing, you pay $6,000 that month. If your billing company improves your clean claim rate and collections climb to $115,000, your fee climbs to $6,900. Your billing company only gets paid more when you get paid more. That is the entire logic of the model.
At a flat $1,500 a month, your fee stays $1,500 whether you collect $80,000 or $150,000. Predictable. But nothing in that number tells your billing company to fight harder for your denials.
Per claim flat fee works differently. If you submit 400 claims a month at $6 each, you pay $2,400 regardless of what those claims actually pay out. Great for high volume, low complexity claims like primary care visits. Rough on complex claims that need rework, because the billing company eats the extra labor on a fee that was priced for a simple claim.
Factor | Flat Fee | Percentage Based |
Typical range | $500 to $2,500/month or $3 to $12/claim | 4% to 10% of net collections |
Predictability | High | Moderate, scales with revenue |
Incentive alignment | Weak on complex claims | Strong, billing company earns more when you collect more |
Best fit | High volume, stable, simple claims | Growing or fluctuating practices, complex specialties |
Risk | Scope creep, minimal denial follow up | Fee escalates as your revenue grows |
Compliance exposure | Generally lower | Requires more careful contract structuring |
You know your cost every single month. That makes budgeting simple and protects high revenue practices from watching their fee balloon as collections grow. Per claim pricing gives you clean unit economics you can track against every visit. And in certain regulatory contexts, flat structures carry less compliance risk than percentage arrangements tied to federal program dollars.
The billing company gets paid the same whether they chase your denials aggressively or let them sit. That is the core weakness. Scope creep is common too. Your base fee might only cover claim submission and posting. Denials, appeals, old A/R, coding, and credentialing often get billed separately, and that turns a “predictable” fee into a moving target. Per claim pricing can also erode margins on complex claims, which means the billing company has less reason to invest time in your hardest cases.
Your billing partner only wins when you win. That single fact drives most of the behavior you actually want, aggressive denial management, faster resubmissions, and real effort chasing underpayments. It scales naturally with seasonal swings and growth, so you are never paying a fixed fee during a slow month. This is why it remains the standard model for most practices in the 4% to 8% range across the country.
Success gets expensive. A practice that grows collections from $300,000 to $600,000 a month sees its billing fee double even if the actual workload barely changes. An orthopedic group collecting $600,000 a month at 6% pays $36,000 a month, or $432,000 a year, in billing fees alone. High revenue practices with relatively clean, simple claims often find that switching to a flat fee model cuts their annual billing expense by 20% to 35%. There is also more compliance homework required, which we will cover below.
Small and solo practices usually do better with percentage based billing, even though the percentage looks higher on paper. Here is why. Small practices tend to have inconsistent monthly collections, more denials relative to staff bandwidth, and less negotiating leverage. A billing partner who only gets paid when claims get paid has real motivation to chase every dollar for you, which matters more than the headline rate.
Large, high volume practices with stable, relatively simple claims often save real money on flat fee or per claim pricing. Once your collections are consistently high, a fixed percentage starts working against you instead of for you. Practices submitting 1,000 or more claims a month can often negotiate percentage rates down to 4% to 7%, but even at that lower rate, the dollar amount can exceed what a comparable flat fee structure would cost.
If you are actively growing, adding providers, adding locations, expanding into new payer contracts, percentage based billing flexes with you without a renegotiation every quarter. A flat monthly fee often comes with volume caps that force a contract amendment the moment you exceed them. Growing practices should ask billing companies directly how their flat fee structure handles a 20% jump in claim volume before signing anything.
Percentage based billing, without question. It ties the billing company’s income directly to your collections. Flat fee billing can still work well, but only if the contract explicitly includes denial management, appeals, and A/R follow up in the base scope, not as billable extras. Ask for that in writing before you sign.
Watch for these regardless of which model you choose. Claim resubmission fees running $2 to $5 each, payer enrollment fees of $50 to $200, patient statement fees of $0.50 to $2 per statement, monthly minimums between $200 and $1,000, and early termination penalties equal to three to six months of fees. Clearinghouse pass through charges and EHR integration fees, which can add $200 to $800 a month, also show up outside the headline rate more often than they should.
That last question alone changes your effective cost more than almost anything else in the contract.
Practices compare the wrong number more often than not. They look at the percentage rate or the flat fee and stop there, without asking what falls outside the base scope. They sign multi year contracts without reading the termination clause. They fail to benchmark their own current performance, clean claim rate, denial rate, days in A/R, before comparing quotes, which means they cannot tell whether a new billing partner is actually better or just cheaper.
A clean claim rate above 95% and days in A/R below 35 are the benchmarks of a high performing billing partner, and they are worth paying a slightly higher rate to achieve. A billing company charging 4% with a 90% clean claim rate and slow follow up will cost you more in lost and delayed revenue than a company charging 7% with a 97% clean claim rate and aggressive denial management. Run the math on your actual numbers, not the advertised rate.
A low rate with a weak team means more denials sitting unworked, slower reimbursement, and revenue that never gets recovered at all. That gap does not show up on the invoice. It shows up in your bank account three months later, and by then it is much harder to trace back to the decision that caused it.
Before comparing a single quote, pull your current clean claim rate, denial rate, and average days in A/R. Industry benchmarks put clean claim acceptance at 95% or higher, days in A/R under 35, and denial rates between 5% and 10%, with best in class performers under 5%. Then multiply your average monthly collections by each quoted rate and compare the annual totals side by side, including the extras. That is the only comparison that actually means anything.
This is where percentage based billing gets more complicated than most guides admit, and it matters if you see Medicare or Medicaid patients.
Medicare reassignment rules and OIG guidance generally require that a billing agent’s compensation not depend on the amount billed or collected. OIG Advisory Opinion 98-4 outlined that percentage based contracts can qualify for the personal services and management contracts safe harbor, but only if the arrangement meets specific written, term, and compensation requirements. Several states have gone further. New York’s Medicaid Fraud Control Unit has historically interpreted federal reassignment rules to treat percentage based billing arrangements as prohibited fee splitting. Other states allow it. California’s Business and Professions Code Section 650(b) specifically carves out fair market value percentage of revenue arrangements as lawful, provided a proper fair market value analysis backs the fee.
The takeaway. If your practice has meaningful Medicare or Medicaid volume, have your attorney review the fee structure before you sign, regardless of which model you choose.
Most charge between 4% and 10% of net collections, with 5% to 8% being the most common range for small to mid sized practices.
It can be, but the arrangement needs to be structured carefully. Federal Medicare rules and OIG guidance restrict fee arrangements tied to billed or collected amounts unless specific safe harbor conditions are met, and several states impose their own fee splitting restrictions on top of that.
It depends entirely on your collections volume and claim complexity. Lower volume, inconsistent practices usually come out ahead with percentage based billing. High volume, high revenue practices with straightforward claims often save money with flat fee or per claim pricing.
Yes. Practices with ten or more providers or over 1,000 monthly claims typically negotiate rates down to 4% to 7% because of the volume they bring.
Yes, most practices can renegotiate or switch billing partners once their contract term ends. Review your termination clause first, since many contracts carry a notice period and a transition fee.
Usually. Outsourcing typically runs 30% to 50% cheaper than in house billing once you account for salaries, benefits, software, and training.
Neither model wins outright. Percentage based billing rewards effort and fits most small to mid sized practices. Flat fee billing protects your budget and rewards high volume, high revenue practices with clean claims. The number on the quote is the least important part of the decision. What actually determines your return is clean claim rate, denial rate, days in A/R, and whether the contract covers what you think it covers.
Before you sign anything, run your own numbers against the actual benchmarks, not the advertised rate. And if you want a second set of eyes on a contract before you commit, that conversation costs you nothing and could save you five figures a year.
iRCM is an industry leader with innovative technology and an expert team. We are a complete Revenue Cycle Management solution that streamlines reimbursements and delivers remarkable results.
