In-house or outsourced medical billing: how to decide

For most small and mid-size practices, outsourcing medical billing costs less than an in-house team big enough to run the whole revenue cycle, and it keeps claims moving when someone is out. Keeping billing in-house makes sense when you have the volume to pay for at least two trained billers and someone who checks their numbers every month. Decide on four results, not on the fee alone: net collection rate, days in A/R, denial rate and clean claim rate.

One biller at the national median pay costs about $62,600 a year with benefits, before software, a clearinghouse, training or cover for a vacation. A billing company charges for what it collects and brings its own cover, but you manage a contract instead of a person.

In short: Price an in-house biller at pay ÷ 0.775, then add software, clearinghouse, training and cover for leave. Compare it with quotes as a share of collections, and compare results on the same four measures. If you outsource, sign a business associate agreement and keep Medicare payments going to an account in your name.

The true cost of an in-house medical biller

Start with pay. The BLS occupation closest to a biller who submits claims, posts payments and follows up is billing and posting clerks, with a median annual wage of $48,500 in May 2025.

Then add benefits. In the BLS Employer Costs for Employee Compensation release for June 2026, benefits were 30.0 percent of private employers’ compensation costs, and paid leave was 7.5 percent. A salary already pays for vacation and holidays, so leave that out: the rest is 22.5 percent of total compensation, and because it is a share of the total, you divide pay by 0.775. For office and administrative support jobs, benefits ran a little higher, at 31.3 percent, so this estimate leans low.

That comes to $4,042 a month in pay plus $1,173 in benefits: $5,215 a month, or $62,581 a year, for one biller. That is the cost of the person. The cost of the job is higher.

Leave, vacancies and turnover

Paid leave is in the salary, but the work stops while your biller is away. BLS puts the average at 11 paid vacation days after a year of service in private industry, plus 7 paid sick days (March 2026). With one biller, that is up to 18 working days a year when claims and denials wait.

Replacing a biller takes longer. In a November 2026 MGMA Stat poll, about four in five practice leaders had an open administrative position, and 16 percent said it had been open six months or longer. In MGMA’s July 2026 poll on days in A/R, leaders traced delays to vacancies and turnover in billing departments and hard-to-replace A/R staff, and also to changing billing companies.

Software, training and supervision

Add a seat in your billing system, a clearinghouse contract for claims, remittances and eligibility checks, paid time to keep up with code and payer rule changes, and someone, usually you or the practice manager, to check the work. None of these has a standard price, so use your own invoices.

Comparing in-house and outsourced cost

Divide the monthly total by what you collect to compare it with a quote. One biller at $5,215 a month is 10.4 percent of $50,000 in collections and 5.2 percent of $100,000, before the costs above. A fixed cost shrinks per dollar as you grow, which is why large groups with a full billing department can keep billing in-house.

Most practices need more than one person. Our guide to medical billing costs prices a full three-provider team and the fees to ask a billing company about. The calculator below sizes an in-house team to your provider count and sets it next to an estimated ReliableCare fee. Change any line to match your office.

It compares cost, not results. The measures below show what each option collects.

In-house vs outsourced billing: what you control and what you give up

The choice is less about price than about what you want to manage: people or a contract.

Keeping billing in-house

You hire, train and direct the people and set their priorities each day. Your billers sit near the front desk and the clinicians whose notes they bill from, so a question gets answered in person. You also carry recruiting, cover for leave and vacancies, supervision, and the knowledge that leaves when someone does. The cost is fixed and rises with each hire. If billing rests on one person, so does your cash flow.

Outsourcing billing

You trade a payroll line for a contract, a fee that moves with collections and a team that covers its own absences. You give up direct supervision: you see the work through reports and system access, so agree on both before you sign. In MGMA’s guidance on revenue cycle vendors, consultant Kem Tolliver says “clear expectations should be mutual,” covering the vendor’s work and the practice’s own duties, such as sending complete information on time.

Some work never leaves your office: check-in, copays and clinical notes. A billing company can only bill what it receives. Outsourcing also ties your cash flow to a vendor’s systems: in November 2024, MGMA reported that some practices had moved revenue cycle work back in-house after the Change Healthcare ransomware attack.

The numbers to compare: collection rate, A/R days, denials and clean claims

Measure your current billing on these four numbers first. Then ask every vendor to report the same four, calculated the same way, every month.

The AAFP’s practice finance guidance defines the first three. Its adjusted collection rate, usually called net collection rate, shows how much of what you are owed you actually collect. The AAFP warns that mixing noncontractual write-offs, such as untimely filing, into contractual adjustments gives a misleading picture. Our guide to calculating days in A/R explains the second.

The AAFP counts denials in dollars, while HFMA’s MAP Keys count claims denied against claims remitted. Either works if it stays the same each month. HFMA defines clean claim rate as claims that pass the claim scrubber’s edits with no manual intervention, divided by claims accepted into it. In the MGMA vendor article, which counts claims that pass without errors, Tolliver calls 90 percent generally an industry best practice.

Write each measure and its formula into the contract and review them regularly, as MGMA recommends. If your in-house numbers already meet these benchmarks, outsourcing has to win on cost and cover. If they don’t, it is about results.

Hybrid medical billing: keep part of it in-house

You do not have to choose all or nothing. In MGMA’s November 2024 poll, many leaders with no new outsourcing plans said part of their revenue cycle was already outsourced, especially billing and coding. Common splits:

• Front end in, back end out. Your staff check eligibility, collect copays and enter charges; an outside team handles claims, posting, denials and A/R follow-up.
• Billing in, old A/R out. Your billers keep current claims while an outside team works A/R recovery past 90 days or a backlog.
• Billing in, front end supported. A HIPAA-trained virtual assistant checks eligibility and works prior authorizations in your systems.

Hybrids fail at the handoffs, such as a denial nobody owns. Write each step down with its owner, and have both sides report the same four measures.

HIPAA, Medicare and OIG rules when you outsource billing

A business associate agreement

Your own billers are part of your workforce under HIPAA. A billing company is a business associate: the HIPAA definition names billing, claims processing and practice management among the functions that make an outside company one. The written contract has to meet 45 CFR 164.504(e). Among other terms, it must:

• Limit how the company may use and disclose protected health information.
• Require safeguards, and reports of any improper use or breach.
• Bind every subcontractor that handles the information to the same restrictions.
• Return or destroy the information when the contract ends, where feasible.
• Let you end the contract if the company violates a material term.

The rule binds you too. If you know of a pattern of material breach, you must take reasonable steps to cure it and, if that fails, end the contract where feasible. Ask who will touch your data, where they work and which subcontractors are used. For the agreement itself, check with your health care attorney.

Who receives your Medicare payments

Medicare pays the provider. Chapter 1, section 30.2 of the Medicare Claims Processing Manual makes an exception for agents that furnish billing or collection services, under the conditions in section 30.2.4. The agent’s compensation must not be related in any way to the dollar amount billed or collected, must not depend on collection, and the agent must follow payment instructions you can change or revoke at any time. Those conditions do not apply to an agent that only prepares bills and does not receive or negotiate the payments.

So a company paid a percentage of collections should prepare and follow up your claims, while Medicare deposits go to an account in your practice’s name.

What the OIG expects of billing companies

The HHS Office of Inspector General’s compliance guidance for third-party medical billing companies, published in 1998, recommends that billing companies agree on compliance responsibilities with each client and write them into the contract, listing which functions are shared and which belong to one side. At a minimum, a company should send its compliance program to every client, and it should tell clients about audit results, inappropriate claims and overpayments.

The OIG also says coders’ pay should give no financial incentive to upcode, and it has a longstanding concern that percentage billing arrangements may raise that risk. Because billing companies rarely receive payment for clients, it notes that refunding an overpayment is generally viewed as the provider’s responsibility. Outsourcing moves the work, not the responsibility for your claims.

Should you outsource medical billing? A checklist by practice size

These are the starting points we would suggest; your own numbers decide.

Then, at any size:

1. Price an in-house team of at least two at pay ÷ 0.775, plus software, clearinghouse and training.
2. Measure your current net collection rate, days in A/R, denial rate and clean claim rate.
3. Get each quote as a total monthly cost at your volume, with the same four measures in writing.
4. Confirm the business associate agreement, the subcontractors and where the work is done.
5. Keep payer deposits in an account in the practice’s name.
6. Write down which steps stay in-house, and agree on the exit: notice, open claims and your data.

How ReliableCare handles medical billing

ReliableCare runs the full revenue cycle for U.S. practices, inside the EHR or practice management system you already use: eligibility checks, prior authorizations, coding, claim submission, payment posting, denials and A/R follow-up. Full-service billing is 3% to 6% of monthly collections, set by volume, with no setup or onboarding fees and flexible monthly-minimum plans for new and smaller practices. Your exact rate comes in writing after a free A/R review.

We sign a business associate agreement before any patient information is shared (see our HIPAA compliance and BAA page), and each month you get one report with collections, days in A/R, A/R over 90 days, denial rate, first-pass acceptance and net collection rate. If you keep billing in-house, we can work the aging alongside your team, or only the old claims, quoted after the free review. See how our medical billing service works.