Most comparisons stack a salary against a percentage and stop. Here is the full cost of each model, including the parts that do not appear on either invoice.
The usual version of this comparison is dishonest in both directions. In-house advocates count only salary. Outsourcing advocates count only the percentage. Neither is the real number.
Here is the fuller accounting. We do outsourced billing, so read this knowing that — and check the arithmetic against your own numbers rather than ours.
The true cost of in-house
Direct compensation. Salary plus payroll tax, benefits, paid time off. For most practices this is meaningfully above base salary.
Software and infrastructure. Clearinghouse fees, billing module licensing, coding reference subscriptions, secure storage.
Training and certification. Coding certification maintenance, annual code-set updates, payer policy training. Skipping this is not a saving; it shows up later as denials.
Management time. Someone has to supervise, review, and handle escalations. This is usually a practice manager or a physician, and it is usually uncounted.
Coverage risk. This is the one that is almost never modelled. A one-person billing office has no redundancy. Vacation, illness, or resignation stops your revenue cycle. The cost is not the temp — it is the AR that ages during the gap and the denials that pass their filing deadline.
Turnover. Recruiting, onboarding, and the productivity trough while a new hire learns your payer mix.
The true cost of outsourcing
The percentage. Usually charged on collections, which aligns the incentive: the vendor is paid when you are. Confirm what the percentage is calculated on — collections, or charges. Those are very different numbers.
Setup and transition. Data migration, payer notifications, credentialing updates. Ask whether it is charged.
Retained internal effort. Outsourcing billing does not outsource the front desk. Eligibility, authorisation and documentation stay with you — and if they are the source of your denials, a vendor cannot fix them alone.
Switching cost. Real, and worth asking about before you sign: who owns the data, in what format, and what happens to open AR at termination.
The honest comparison
Do not compare a salary to a percentage. Compare total cost as a percentage of collections on both sides — and then compare collections, because the models rarely produce the same top line.
A cheaper billing operation that collects less is not cheaper.
When in-house genuinely wins
- High volume with a narrow payer mix and stable, repetitive claims
- An existing billing team that is performing well — measured, not assumed
- Specialty workflows so unusual that generic billing expertise adds little
- Enough headcount for real redundancy
When outsourcing genuinely wins
- One-person billing office with no coverage
- Aged AR nobody has time to work
- Denial rate trending up with no root-cause analysis happening
- A practice growing faster than it can hire and train
- Credentialing repeatedly delaying new providers billing
The test that settles it
Ask for the same four numbers from your current operation and from any vendor you are considering:
- First-pass clean claim rate
- Denial rate, and the top three denial reasons by dollars
- Percentage of AR over 90 days
- Net collection rate against contracted allowables
If your in-house team can produce those on request, you likely have a functioning operation. If nobody can produce them, that is the finding — and it is true regardless of which model you pick next.
