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Today I received an ABA clinic owner question I thought would be valuable for others. Here’s the query: “We are looking at two billing vendors, one at 7% and another at $3,500 per month flat rate. Our average monthly collections are $120,000.
Which do we go with?”
The response isn’t about the cheapest-looking number. $120,000 in monthly collections would cost the 7% vendor $8,400 a month, while the flat-rate vendor costs $3,500. That’s $58,800 a year spent on an unnecessary billing cost, all due to the ABA clinic owner’s pricing model choice. It is one of the most overlooked and most expensive revenue leaks in behavioral health to select the ABA billing pricing model incorrectly.
This framework will assist you in deciding how to select the appropriate billing pricing model for the size, payers, and stages of your ABA practice.
Not Sure Which Billing Model Fits Your Clinic?
BehavioralProz provides a free ABA billing assessment that includes a side-by-side pricing model comparison based on your actual collections data.
What Is Contingency ABA Billing?
Contingency billing, also called percentage-of-collections billing, means your billing company charges a percentage of whatever they collect on your behalf. Typical rates run from 4% to 10% for ABA practices, depending on the vendor, specialty complexity, and services included.
How it works:
- Your billing company will send claims, post payments, and chase down denials.
- By month-end, your billing company will invoice you for their contracted percentage of the revenue they actually collected.
- If your practice collects less money in a given month, you pay the billing company less; If collections were higher than average, your bill will be higher.
Pros:
- Better aligns incentives; your vendor has more money in the bank when you have more money in the bank.
- Reduces up-front cash commitment for startups with irregular revenue streams.
- Risk is distributed if you have a payer mix with a high concentration of problematic payers.
Cons:
- The more you collect, the more your billing cost grows – as your practice succeeds, your monthly bill increases.
- Can be quite costly as your clinic scales and you grow to mid-size or large size.
- Some vendors decrease follow-up on claims with low potential reimbursement (less commission for the vendor).
What Is Flat-Fee ABA Billing?
Flat-fee billing means you pay a fixed monthly amount either per provider, per claim, or as a total monthly rate regardless of what you collect.
How it works:
- Fixed monthly invoice, predictable regardless of claim volume or collections
- Some vendors charge per provider ($150 to $400/provider/month); others charge a flat total
Pros:
- Predictable cost easy to budget
- Becomes more cost-effective as collections grow
- No financial incentive for vendor to cut corners on low-value claims
Cons:
- Higher risk for startups with low or unpredictable collections
- Vendor is paid whether performance is strong or weak; requires monitoring
- Some flat-fee vendors exclude services (credentialing, prior auth); confirm scope
How Do the Two Models Actually Compare?
What Does the Real Math Look Like?
How Much Does Each Model Actually Cost at Different Collection Levels?
| Monthly Collections | Contingency at 7% | Flat Fee Estimate | Annual Savings (Flat Fee) |
|---|---|---|---|
| $20,000 | $1,400/month | $800/month | $7,200/year |
| $60,000 | $4,200/month | $2,000/month | $26,400/year |
| $120,000 | $8,400/month | $3,500/month | $58,800/year |
| $250,000 | $17,500/month | $7,000/month | $126,000/year |
| $500,000 | $35,000/month | $12,000/month | $276,000/year |
At $60,000 monthly collections, flat fee saves over $26,000 per year. At $250,000 monthly, the savings exceed $126,000. This is not a marginal difference; it is a staffing decision, a technology investment, or a new clinical program.
Expert insight: “When comparing proposals, do not compare percentages alone. Compare your effective annual cost after accounting for collections volume, denial management quality, credentialing support, and AR recovery. The cheapest percentage often has the most expensive gaps.”
Know Exactly What You Are Paying Before You Sign
BehavioralProz provides transparent ABA billing pricing with a written scope of services, no hidden fees, no long-term lock-in. Request your custom pricing today.
What Are the Hidden Costs No One Talks About?
Both pricing models can include costs hidden within them that dramatically alter the actual number:
Hidden costs in contingency billing:
- Less work is performed on low-dollar claims (no motivation to earn commission).
- Vendors are a high percentage and exclude prior authorization work.
- Only specific age buckets are followed for AR follow-up.
Hidden costs in flat-fee billing:
- Credentialing may be added as a separate cost ($150-500/provider).
- Prior authorization work excluded.
- Each additional claim (re-submission, corrected) may cost more.
- Long-term contracts with exit fees.
The question to ask every vendor: “What exactly is NOT included in this fee?” This should be a mandatory question you ask every vendor. If you receive a vaguer answer, that is a signal to look more closely. Scope it in writing before you sign.
Which Model Works Best for Which Practice?
Small Startup (Under $30K Monthly Collections)
Best model: Contingency
If collections are low, a flat fee minimum might be more than you would pay for percentage-based billing. Contingency balances risk nicely while building revenue and getting payer mix stabilized.
Watch for: Monthly minimum fees on flat rate contracts that begin accumulating regardless of collection volume.
Growing Practice (30K to 100K Monthly Collections)
Best model: Transition point
When collections begin to hit the $40-60K monthly mark, a flat fee often begins to pencil out as cheaper. Actually run the math at your particular collections, regardless of direction.
Established Clinic (100K+ Monthly Collections)
Best model: Flat fee strongly
$120,000/month at 7% contingency would be $8,400/month, versus $3-5,000/month on a full service flat fee contract-$42,000 to $64,000 annually, to be exact.
Multi-Location ABA Organization (250K+ Monthly)
Best model: Flat fee or negotiated hybrid
For large-scale operations, there’s little question that neither pure flat rate nor pure percentage-based billing makes the most sense. Negotiate a monthly base flat rate and then a much lower, discounted percentage-based (2-3%) collection to create alignment while managing ultimate spend.
What Mistakes Do ABA Practices Make When Choosing a Billing Model?
- Comparing percentages without calculating annual cost: 7% looks similar to 8% until you’re collecting $200,000 per month
- Not auditing what is included: A lower percentage with excluded services often costs more total
- Signing long-term contracts before testing performance: Request month-to-month for the first 90 days
- Not tracking collections after switching: If collections drop after switching to flat fee, the savings calculation changes
- Assuming contingency means better collections: Flat-fee vendors can and should be held to the same performance standards; track their clean claim rate and denial rate independently
What Questions Should You Ask Before Signing a Billing Contract?
- What is your average first-pass clean claim rate for ABA practices?
- Is prior authorization management included or billed separately?
- Is credentialing included, and for how many payers?
- What is your denial follow-up SLA?
- Do you work inside our existing EHR (CentralReach, Rethink, etc.)?
- What is the contract length and termination clause?
- Can you provide references from ABA practices with similar collections volume?
- What reporting do I receive, and do I have independent dashboard access?
What Red Flags Should You Watch for in ABA Billing Contracts?
- No independent reporting access; you cannot verify their performance
- Percentage billed on gross billed charges rather than collected revenue costs far more
- Automatic contract renewal with 60-90 day written termination requirement
- Prior authorization and credentialing listed as add-on fees not disclosed upfront
- No defined denial follow-up or AR aging follow-up policy
Quick Summary: How to Choose
- If you collect under $40,000/month: Contingency likely costs less.
- If you collect $40,000 to $80,000/month: Run the calculation; it depends on vendor pricing.
- If you collect over $80,000/month: Flat fee almost always saves more.
- If you are multi-location: Negotiate a hybrid or enterprise flat-fee arrangement.
Know Your Number Before You Sign Anything.
BehavioralProz provides a free ABA billing cost assessment. We calculate your actual annual cost under both models based on your current collections data, payer mix, and provider count. No commitment, no pitch until you have seen the numbers.
Frequently Asked Questions
What is the average contingency percentage for ABA billing?
Most ABA billing companies will charge somewhere in the realm of 4% and 10% of collected revenue. For specialty ABA billing with full-service RCM support, this average typically ranges from 5% to 8%.
When does flat-fee ABA billing make more sense than contingency?
Flat-fee billing starts to be more cost-effective as you consistently begin to collect $40k-$60k or more each month. Above this point, you almost always come out ahead when you’re paying a set fee per month versus a percentage of your collections.
Does a contingency model motivate better ABA billing performance?
It does provide an incentive to optimize collections but can also incentivize neglect for low-value claims that do not earn much commission. A flat-fee vendor under contract, committed to documented KPIs such as clean claim rate, denial rate, and days in AR, can achieve comparable or better results.
What hidden costs should ABA practices watch for in billing contracts?
The most common hidden costs are credentialing fees billed separately, prior authorization management excluded from the base service, per-submission fees for corrected claims, and early termination penalties not disclosed upfront.
Can I switch from contingency to flat-fee billing without disrupting claims?
Yes, through a planned, concurrent conversion process. Most conversions can be completed without gaps in your billing cycles within 4-6 weeks with proper planning for setting up workflows.
What is the break-even point between contingency and flat-fee ABA billing?
That point will be dependent on the individual fee schedules for flat rate and contingency arrangements. A general rule of thumb is if your monthly collection amount times the contingency percentage exceeds the flat fee amount by $500+, then flat fee is likely a better option.
Should a new ABA startup use contingency or flat-fee billing?
Contingency will generally be a lower risk for startup businesses because the fees grow and shrink along with your revenue; you won’t have a set bill if collections for the month are poor. You can reconsider flat rate billing once you consistently have $40,000 or more in collections per month.