By the VerifyDoc team
If you're uninsured or underinsured and received hospital care, federal law gives you the right to pay no more than what insured patients pay — and at many nonprofit hospitals, you may qualify for free care entirely.
This post walks through a labeled hypothetical scenario showing exactly how charity care and financial assistance rules work step by step: what to ask for, how the hospital must respond, what the bill legally can and can't say, and what to do if you were charged full gross charges when you shouldn't have been. We cover the relevant statute — Internal Revenue Code § 501(r) — and what it means in practice for the bill sitting on your kitchen table.
Why This Matters More in 2026
According to KFF, the number and share of people without insurance grew in 2024, increasing for the first time since 2019. That trend is accelerating: the number of people who are uninsured is expected to continue to increase in coming years because of changes to Medicaid and the ACA Marketplace included in the 2025 reconciliation law, the expiration of Marketplace enhanced premium tax credits, and other administrative changes. More uninsured people means more hospital bills landing at full gross-charge rates — often many times what an insurer would actually pay.
The IRS defines "charity care," also known as "financial assistance," as "free or discounted health services provided to persons who meet the organization's eligibility criteria for financial assistance and are unable to pay for all or a portion of the services." But hospitals benefitting from various federal and state tax exemptions have a legal requirement to provide financial assistance to those who cannot afford the cost of care — it's not a favor, it's a condition of their tax-exempt status.
Federal law requires that nonprofit hospitals — which account for nearly three-fifths (58%) of community hospitals — provide some level of charity care as a condition of receiving tax-exempt status, and many state governments require all or a subset of hospitals to extend eligibility for charity care to certain groups of patients. The problem is that some patients have fallen through the cracks — i.e., were likely eligible for assistance but did not receive it , according to KFF Health News.
The Federal Law: IRC § 501(r) Explained
The ACA, enacted March 23, 2010, added a new Section 501(r) to the Internal Revenue Code. An IRS final rule requires hospitals to maintain exemption from federal income tax as required under the ACA. Hospital organizations must meet four key requirements under Section 501(r) on a facility-by-facility basis to maintain their tax-exempt status.
For patients reviewing bills, the two most directly relevant subsections are § 501(r)(4) and § 501(r)(5). Section 501(r)(4) requires a hospital organization to establish a written financial assistance policy (FAP) and a written emergency medical care policy for each hospital facility it operates. The FAP must include eligibility criteria for financial assistance, whether free or discounted care is included, the basis for calculating amounts charged to patients, the method for applying for financial assistance, and any extraordinary collection actions the organization may take in the event of nonpayment.
Critically, the FAP must also include a description of how it is "widely publicized" to the community, typically using a combination of posting on the hospital's website, attaching policies to invoices, posting policies in emergency rooms and waiting rooms, and distribution through the admissions office. If you received a bill with no mention of financial assistance options, that alone is a red flag worth flagging when you dispute the bill ��� and it's worth cross-referencing against the hospital's published price transparency disclosures to see whether the FAP is even posted.
The AGB Cap: The Number That Limits What You Owe
A hospital organization meets the requirements of Section 501(r)(5) only if the hospital facility limits the amount charged for any emergency or other medically necessary care it provides to a FAP-eligible individual to not more than the amount generally billed (AGB) to individuals who have insurance covering such care. In plain terms: if you qualify for the hospital's financial assistance program, they cannot bill you more than what a typical insurer would pay for the same service.
Under the look-back method for determining AGB, a hospital determines AGB by multiplying gross charges by one or more percentages. Facilities must calculate their AGB percentages at least annually by dividing the sum of all claims for emergency or other medically necessary care allowed by health insurers during a prior 12-month period by the sum of the associated gross charges for those claims. As an illustrative example from the federal regulations themselves (26 CFR § 1.501(r)-5): a hospital with $400 million in allowed claims against $800 million in gross charges has an AGB of 50% — meaning FAP-eligible patients are capped at half the sticker price.
That gap matters enormously. Hospital gross charges are routinely two to four times what insurers actually pay. If a hospital bills you $12,000 at gross charges but its AGB percentage is 45%, a FAP-eligible patient's maximum bill for that same care is $5,400. Hospital facilities may offer payment discounts outside of their FAPs and may charge discounted amounts greater than AGB to individuals who are not FAP-eligible — so an "uninsured discount" you weren't told about is not the same as a formal FAP discount, and may still leave you paying more than the AGB cap. Learn more about how hospitals structure those line items in our guide to what "adjustments" on a hospital bill actually mean.
Illustrative Scenario: Maria's ER Visit (Labeled Hypothetical)
The following is an illustrative scenario created for explanatory purposes. All names, figures, and facts are hypothetical.
The situation: Maria is self-employed with no health insurance. She goes to the emergency room at a nonprofit hospital for a kidney stone. She receives a bill for $18,500 — the hospital's full gross charges. She's never told about the hospital's Financial Assistance Policy.
Here's what the law says should have happened at each step:
| Step | What Should Have Happened | Governing Rule | Red Flag If Missing |
|---|---|---|---|
| 1. Admission / registration | Hospital should have displayed FAP notice in the ER and admissions area, and offered a plain-language summary | IRC § 501(r)(4); 26 CFR § 1.501(r)-4 | No FAP posting visible; no mention of financial assistance |
| 2. Billing statement | Bill must notify patient that financial assistance is available and provide contact info for a financial counselor | IRC § 501(r)(4) publicity requirement | Bill only shows balance due with no FAP mention |
| 3. FAP eligibility screening | Before any extraordinary collection action, hospital must make reasonable efforts to determine if patient qualifies for FAP | IRC § 501(r)(6) | Sent to collections without any FAP screening |
| 4. Amount charged if FAP-eligible | Maximum charge for ER/medically necessary care = AGB (e.g., 50% of gross charges = $9,250 on an $18,500 bill) | IRC § 501(r)(5); 26 CFR § 1.501(r)-5 | Billed at full gross charges despite qualifying for FAP |
| 5. Collections / legal action | Reporting to credit bureaus, wage garnishment, suing — all are "extraordinary collection actions" barred before FAP screening is complete | IRC § 501(r)(6); 26 CFR § 1.501(r)-6 | Credit hit or lawsuit before any FAP determination |
Maria's next moves: She should request the hospital's FAP in writing, submit an application, and ask for a retroactive adjustment to AGB or lower. Hospitals are permitted — though not required — to apply FAP determinations retroactively. If the hospital already reported the debt to a credit bureau without completing FAP screening, that may itself be a § 501(r)(6) violation. She should also check whether any third-party providers (radiologists, anesthesiologists) who billed separately are covered by the hospital's FAP — the regulations add the requirement that each FAP list the providers that deliver emergency or other medically necessary care in the hospital facility and specify which providers are and are not covered by the FAP. If a separate physician bill looks inflated, our post on what upcoding is and how to spot it covers the billing code angle.
What the Numbers Look Like: How Much Charity Care Are Hospitals Actually Providing?
The law sets a floor, not a ceiling — and practice varies enormously. According to KFF, charity care costs represented 1.4% or less of operating expenses at half of all hospitals in 2020. At the low end, charity care costs represented 0.1% of operating expenses or less at 8% of hospitals, while they represented 7.0% of operating expenses or more at a similar share (9%).
Geography plays a large role. As a result of the Affordable Care Act, states have the option of expanding Medicaid to nearly all adults with incomes up to 138% of the federal poverty level. Eight of the ten states with the highest average charity care costs as a percent of operating expenses in 2023 had not expanded Medicaid as of January of that year. Texas had both the highest uninsured rate (16%) and the highest average charity care costs as a percent of operating expenses (6.6%) in the country.
A 2026 KFF Health News investigation found significant barriers at the application level: patients face inconsistent eligibility standards and extensive applications. To qualify at many hospitals, patients must submit detailed personal information, including bank statements, retirement accounts, mortgage documents, and estimates of other assets such as cars, homes, or livestock. There is also wide variation between neighboring hospitals in the same city — similar variations in charity care standards exist at hospitals nationwide. A recent analysis by the nonprofit Lown Institute found that one hospital in Boston set the limit for free care at less than half the level of another hospital just a few blocks away.
How to Apply: A Practical Checklist
The application process can feel designed to discourage you. Don't let it. Here's what to do, grounded in what the regulations actually require the hospital to provide:
- Find the FAP on the hospital's website. The hospital is required by 26 CFR § 1.501(r)-4 to post it publicly. Search the hospital's name plus "financial assistance policy" or "charity care." If it's not easily findable, that's a compliance problem you can mention in your dispute letter.
- Request a paper copy at no charge. The hospital must provide it free, including in the admissions area and emergency room, upon request.
- Check the income thresholds. Most FAPs use Federal Poverty Level (FPL) percentages. Common thresholds range from 200% FPL (free care) to 400% FPL (discounted care), though the law sets no national minimum — each hospital sets its own criteria.
- Submit the application with required documentation. Typically: recent pay stubs or tax return, household size, and possibly bank statements. Keep copies of everything you submit.
- Request an itemized bill simultaneously. You need both the FAP determination and a line-by-line itemization to verify that the final adjusted amount is correct. Errors in billed codes remain errors even after a FAP discount is applied — see our guide on spotting wrong billing codes on a hospital bill.
- Ask the hospital to suspend collections while your application is pending. Under IRC § 501(r)(6), the hospital cannot pursue extraordinary collection actions — including credit reporting or lawsuits — before it has made reasonable efforts to determine your FAP eligibility.
For-Profit Hospitals: Different Rules Apply
IRC § 501(r) only applies to nonprofit hospitals that hold 501(c)(3) tax-exempt status. For-profit hospitals have no federal obligation to offer charity care under this statute, though some states impose independent requirements. Most community hospitals (58%) are nonprofits. Nonprofit hospitals are often exempt from federal, state, and local taxes and, in return, are expected to provide benefits to the communities they serve.
If you're at a for-profit hospital, you can still negotiate. Hospital facilities may offer payment discounts or other discounts outside of their FAPs even when no legal obligation exists. Ask the billing department directly whether they have an uninsured discount policy or a prompt-pay discount. Our step-by-step guide on how to negotiate a hospital bill covers that process in detail. Additionally, be aware that whether you're at a nonprofit or for-profit facility, extraordinary collection actions include selling an individual's debt to another party, reporting adverse information to consumer credit reporting agencies or credit bureaus, deferring or denying medically necessary care because of nonpayment for previously provided care, and garnishing wages.
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Get started →Frequently asked questions
I'm uninsured and already paid my hospital bill in full. Can I still apply for charity care retroactively?
Many hospitals will accept a retroactive FAP application, and federal regulations under IRC § 501(r) do not prohibit hospitals from making retroactive adjustments. The IRS's regulations at 26 CFR § 1.501(r)-5 do not set a deadline by which a patient must apply — that timing is governed by the hospital's own FAP. Read the hospital's FAP carefully for any stated application window, which many hospitals set at 240 days from the first billing statement. If you already paid but believe you qualified for a lower AGB-capped amount, submit a written request for a retroactive review along with your financial documentation; the hospital has discretion to refund or credit the difference.
The hospital says I "don't qualify" for charity care, but I'm not sure they reviewed my application correctly. What can I do?
Start by requesting the hospital's written FAP and comparing the stated eligibility criteria against your actual income and household size relative to Federal Poverty Level guidelines. Ask the hospital in writing to explain which criterion you failed to meet and how they calculated your income. If the denial appears inconsistent with the published FAP criteria, file a written appeal with the hospital's patient financial services department. You can also contact your state insurance commissioner or attorney general's office, as many states layer additional charity care requirements on top of the federal IRC § 501(r) floor. Documenting every step in writing is critical if you later need to escalate.
A debt collector contacted me about a hospital bill. Doesn't the hospital have to check for charity care eligibility before sending me to collections?
Yes, for nonprofit 501(c)(3) hospitals. Under IRC § 501(r)(6) and 26 CFR § 1.501(r)-6, a hospital must make reasonable efforts to determine whether a patient is FAP-eligible before engaging in any "extraordinary collection action." Reporting adverse information to a credit bureau, selling the debt to a third party, garnishing wages, and filing a lawsuit are all extraordinary collection actions. If any of these happened before the hospital screened you for FAP eligibility, the hospital may be in violation of § 501(r). You should send a written dispute to the hospital's billing office, request a hold on collections, and submit a FAP application immediately. The Consumer Financial Protection Bureau (CFPB) also accepts complaints about medical debt collection practices at consumerfinance.gov/complaint.
I received separate bills from the hospital, the ER doctor, and the radiologist. Does the hospital's FAP cover all of them?
Not automatically. Under the final regulations at 26 CFR § 1.501(r)-4, each hospital FAP must list the providers that deliver emergency or other medically necessary care in the facility and specify which are covered by the FAP and which are not. In practice, many physician groups — including emergency medicine groups, hospitalists, and radiologists — are independent contractors not covered by the hospital's FAP. You'll need to apply separately for any financial assistance those providers offer under their own policies. Always request a copy of the FAP's provider list before assuming a third-party bill is subject to the same discount as the hospital's bill.