The decision to keep billing in-house or outsource it usually starts with a gut reaction. “We’ve always done it ourselves.” Or, “I don’t want to lose control of my revenue cycle.” Both are reasonable instincts. But instincts aren’t a financial model.
Most practice owners who’ve looked at outsourcing compared the cost of an RCM partner’s fee against their billing team’s salaries and stopped there. If the RCM fee was higher, they stayed in-house. If it was lower, they considered switching. This comparison misses most of the actual costs on both sides, and it almost always makes in-house billing look cheaper than it really is.
Here’s the full math.
The true cost of in-house billing
When you ask a practice owner what billing costs them, they’ll give you their biller’s salary. Maybe two salaries if they have a small team. For a mid-size specialty dental practice, that’s typically $45,000-65,000 per biller, so maybe $90,000-130,000 for a two-person team.
That number is real, but it’s incomplete. Here’s what’s missing.
Benefits and payroll taxes. Add 20-30% on top of base salary for health insurance, PTO, retirement contributions, and employer-side payroll taxes. Your $120,000 billing team actually costs $144,000-156,000.
Training. Specialty dental billing is complex. New hires need 3-6 months before they’re productive on OMS, perio, or endo claims. During that ramp period, you’re paying full salary for partial output, and someone else on your team is spending their time training instead of billing. The productivity cost during onboarding is hard to quantify but real.
Turnover. Billing staff turnover in dental runs 25-30% annually. Every time someone leaves, you’re back to the training cycle plus the recruiting cost (job postings, interviewing time, maybe a recruiter fee). One turnover event easily costs $8,000-15,000 when you factor in recruiting, training, and the productivity gap.
Software and tools. Your billing team needs clearinghouse subscriptions, eligibility verification tools, possibly separate software for medical claims. These subscriptions run $200-500/month depending on your setup. That’s $2,400-6,000/year.
Management overhead. Someone has to manage the billing team. Review their work, handle escalations, monitor KPIs, deal with HR issues. In most practices, that’s the office manager or the practice owner themselves. Whatever percentage of their time goes to billing management has a cost, even if it doesn’t show up on a billing-specific line item.
Space and equipment. Your billing team occupies desks, uses computers, prints documents. In a dental office where operatory space is revenue-generating, the square footage allocated to billing has an opportunity cost.
Add it all up. A two-person in-house billing team that looks like $120,000 on paper actually costs $170,000-200,000 per year when you include everything.
The costs nobody tracks
Beyond the line-item expenses, in-house billing carries hidden costs that don’t show up on any report but hit your revenue directly.
Denial leakage. As covered in our piece on first-pass claim rates, in-house teams typically operate at 70-80% first-pass acceptance. The revenue lost to unworked denials and claim abandonment can run $100,000-200,000/year for a busy specialty practice.
Coding errors. Missed cross-coding opportunities between dental and medical, incorrect CPT/CDT mapping, and under-coding all reduce per-claim reimbursement. In-house teams that primarily know dental billing routinely under-bill on procedures that should include medical components.
Aging AR. Without a structured process for working aged claims, money sits in the 90+ day bucket and slowly becomes uncollectible. In-house teams rarely have the bandwidth for systematic AR follow-up because they’re busy with day-to-day claim submission.
No redundancy. When your biller is sick, on vacation, or quits, claims don’t go out. A two-week gap in claim submission creates a cash flow dip that hits 30-45 days later and takes weeks to recover from.
These hidden costs conservatively add another $100,000-200,000 in lost revenue per year. Combined with the direct costs above, your in-house billing operation is costing the practice $270,000-400,000 annually when you include both what you’re spending and what you’re not collecting.
What outsourced billing actually costs
RCM providers for dental specialties typically charge in one of two ways: a flat monthly fee or a percentage of collections. Percentage-based pricing is more common for specialty dental and usually falls between 5-9% of collections.
For a specialty practice collecting $1.5 million annually, that’s $75,000-135,000 per year.
For a practice collecting $2.5 million, it’s $125,000-225,000.
At first glance, the RCM fee might look comparable to or even higher than your billing team’s salaries. But the comparison isn’t fee vs. salary. It’s fee vs. total cost of in-house operation, including the hidden revenue losses.
Here’s what you get for the RCM fee that you don’t get with in-house billing:
No training or turnover costs. The RCM provider handles hiring, training, and retention of their billing staff. Their turnover is their problem, not yours. Your cash flow doesn’t skip a beat when one of their employees leaves.
Specialty coding expertise. A good specialty RCM partner has billers who code OMS, perio, and endo claims every day across dozens of practices. Their coding accuracy is higher because they have deeper experience and see more claim variations than any single-practice biller ever will.
Pre-submission claim scrubbing. Dedicated RCM operations run every claim through payer-specific validation before submission. This is what gets first-pass rates from the 70s into the 90s.
Structured denial management. Denied claims go into a workflow, not a pile on someone’s desk. Every denial gets worked, every appeal gets filed, and nothing falls through the cracks because there’s a system tracking it.
AR follow-up. Systematic follow-up on unpaid claims at 30, 60, and 90 days. Claims don’t age into uncollectability because someone is proactively chasing every outstanding balance.
Reporting. Monthly performance reports showing clean claim rate, denial rate by reason, collection rate, AR aging, and payer-specific performance. Most in-house teams can’t produce these reports because they don’t have the systems or the time.
Running the comparison
Let’s put real numbers side by side for a specialty practice collecting $1.8 million annually.
In-house total cost: $170,000-200,000 in direct costs plus $100,000-200,000 in revenue leakage. Total: $270,000-400,000.
Outsourced cost at 7% of collections: $126,000. Even if outsourcing improves collections by only 10% (conservative for a practice moving from 75% to 94% first-pass rate), that’s an additional $180,000 in revenue.
Net financial impact of switching: you save $44,000-74,000 in direct costs, recover $100,000-200,000 in previously leaked revenue, and gain $180,000 in improved collections. The total improvement is $324,000-454,000, minus the $126,000 RCM fee.
The math almost always favors outsourcing for specialty practices, and it favors it more the larger and more complex the practice is.
When in-house billing still makes sense
Fairness requires acknowledging that outsourcing isn’t right for every practice.
If your practice is small (under $500,000 in annual collections), the RCM fee might not be justified by the improvement. At that scale, a single competent biller can handle the volume, and the hidden costs are smaller because there’s less to leak.
If you already have a billing team with deep specialty expertise, low turnover, and documented first-pass rates above 90%, you’re already capturing most of the value an RCM partner would provide. Switching might not move the needle enough to justify the transition effort.
If control and visibility into your billing process is a top priority and you’re willing to invest in the systems, training, and management to do it well, in-house billing can work. It just requires treating billing as a core operational function with its own KPIs, not as an administrative task handled by whoever has availability.
The question to ask yourself
The real question isn’t “can I afford to outsource billing?” It’s “what is my in-house billing actually costing me, and what am I not collecting because of it?”
If you don’t know your first-pass acceptance rate, your denial rework completion rate, or your 90+ day AR balance as a percentage of total AR, you don’t have enough data to answer that question. And if you don’t have that data, it’s worth getting a billing audit from someone who can quantify the gap.
The practice owners who are most confident their billing is fine are often the ones with the biggest leaks. Not because they’re wrong about their team’s effort, but because effort and results aren’t the same thing in specialty dental billing.