Billing service fee structures: what you actually pay

Fee language is where many billing contracts look simple and become expensive. This page explains the main models practices see, the games played with the collections denominator, typical exclusions, and questions that surface the true all-in rate. It is educational only — not a vendor price list and not a claim that any specific company charges a published “market average.”

Return to the full evaluation frame: How to evaluate a medical billing service. Contract exit terms: Contract terms. Contact: /#lead.

The three (plus hybrid) fee models

1. Percent of collections

The biller charges a percentage of amounts collected (not billed charges). Incentive alignment is the selling point: they earn when you collect. The risk is definitional:

Is the base insurance + patient collections, or insurance only?
Are refunds, takebacks, and recoupments netted before the fee?
Are non-covered cash-pay services included?
Does the fee apply to copays collected at the front desk that never touch the biller’s lockbox?

If “collections” is vague, you cannot compare two 6% quotes.

2. Flat fee (monthly, PEPM, or per provider)

A fixed amount per month, per provider, or per staff seat. Budgeting is easier. Risk shifts: the vendor may under-resource when volume spikes; you may overpay when volume drops. Ask how spike coverage and minimums work, and whether “providers” includes mid-levels, part-time, and locums.

3. Per-claim (or per encounter)

A fixed amount per claim submitted (sometimes per patient statement). Works best when claim mix is predictable and complexity is low. Watch for double counting (primary + secondary as two billable events) and fees for voids/corrections.

4. Hybrid

Examples: base monthly + percentage above a threshold; lower percentage on clean first-pass claims and higher on worked appeals; coding billed separately from A/R. Hybrids are fine when each component has a formula. They are opaque when “implementation,” “optimization,” and “success” fees stack without a one-page math example using your volume.

What “collections” means — and games with the denominator

Demand a written definition, then a worked example with sample remits:

Question	Why it matters
Gross posted payments vs net of refunds?	Takebacks can make a high fee look “normal” on a bad month
Patient responsibility included?	Front-desk cash may already be “collected” without biller work
Capitation / value-based payments?	Different work, sometimes excluded or double-fee’d
When is a payment “collected” for fee calculation?	Posting date vs bank date vs period close
Do they fee on their collections only or all practice receipts?	Scope of payment posting

Industry education bodies such as HBMA (as of 2026-07-21) and cost-oriented surveys discussed in the broader RCM community (e.g., MGMA materials when you subscribe; mgma.com, as of 2026-07-21) are the places practices go for benchmark context. This site does not invent a national average percentage. If a salesperson quotes “typical 5–8%,” treat it as commonly quoted marketing language — verify for your specialty, payer mix, and scope.

What is often excluded (and still costs money)

Ask for an exclusions schedule. Common line items that sit outside the headline rate:

Clearinghouse / EDI transaction fees or platform surcharges
Patient statements (print, postage, portal SMS)
Credentialing / revalidation / CAQH maintenance
Coding (especially specialty or audit remediation)
Prior auth staffing
Eligibility batch runs beyond a cap
First-pass only work — appeals billed hourly or not done
Implementation / conversion fees and dual-system months
Custom report builds beyond a standard pack
Lockbox or payment-channel fees

A low percentage with high exclusions can exceed a higher all-in percentage. Model all-in dollars per month, not the sticker rate.

Who pays clearinghouse costs

Clearinghouses sit between practice systems and payers for 837 claim submission and 835 remittance (administrative simplification context: CMS Administrative Simplification / code sets, as of 2026-07-21). Some billers absorb clearinghouse cost in their fee; some pass through; some mark up.

Get in writing:

Vendor name of the clearinghouse (or “direct to payer” exceptions).
Who is the contracting party.
Per-claim or monthly fee and who invoices you.
What happens on exit (do you keep the enrollments?).

Questions that expose the true all-in rate

Use these in every RFP or sales call:

Show the fee math on a sample month with 1,000 claims, $X insurance collections, $Y patient collections, and Z refunds.
List every fee that could appear on a invoice in year one.
Is denial work included, or only clean submission? To what aging?
Write-off authority — dollar threshold and who signs.
Credentialing: in scope or surprise line item?
Statements and portals: included volume and overage rates.
Secondary claims: same fee or different?
How do takebacks affect the fee in the month of recovery vs original?
What reports prove collection performance independent of their fee invoice?
Exit cost for data export and transition support (ties to contract terms).

For deceptive or incomplete advertising patterns in general commerce, the FTC advertising and marketing guidance (as of 2026-07-21) is a useful consumer-protection frame — not a medical-billing statute, but a reminder that headline rates without material exclusions are a red flag in any service sale.

Comparing two quotes fairly

Build a one-page model:

Expected monthly insurance collections and patient collections (from your last 6 months).
Expected claim count and statement volume.
Known clearinghouse and software costs you already pay.
Apply each vendor’s formula including exclusions.
Add a scenario where denials rise 20% — does cost go up, or does work disappear into write-offs?

If a vendor will not help you complete that model with their actual fee language, you do not have a comparable quote.

How to evaluate a billing service
Who owns denials
Contract terms & data exit
In-house vs outsourced
RCM tools: rcm.today · Sounding-board: /#lead

Editorial only. No vendor pricing directory. Not legal or financial advice. Sources checked as of 2026-07-21.