Medical Bill Negotiation Savings Calculator — Rex's Toolbox

Rex says

Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.

Try a scenario

Click to load — tweak from there.

Inputs

Amount billed($)

Medicare allowable for the service($)

Target multiple of Medicare(×)

Hospital self-pay discount(%)

Household income($)

Federal poverty level for your household($)

Charity care threshold(× FPL)

Payment plan length(months)

Result

Negotiation target

$3,295

Saving vs billed amount

$10,705

Reduction achieved

76.5%

Interest-free monthly payment

$137

Medicare-based benchmark

$4,800

Income as share of poverty level

262%

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How to use this

1Enter amount billed ($).
2Enter medicare allowable for the service ($).
3Enter target multiple of medicare (×).
4Enter hospital self-pay discount (%).
5Enter household income ($).
6Enter federal poverty level for your household ($).
7Enter charity care threshold (× FPL).
8Enter payment plan length (months).
9Read your negotiation target on the right — it updates as you type.
10Hit Share to keep the scenario or send it to someone.

About this calculator

Hospital chargemaster prices are opening positions, not real prices. Insurers pay a fraction, Medicare pays a published rate, and self-pay patients who ask are routinely granted discounts of 30-60% — larger still if household income qualifies for the financial assistance policy every nonprofit hospital must publish. This calculator builds a defensible negotiation target from the direction that actually works: start from the Medicare allowable for the service, apply a reasonable multiple (many self-pay agreements land between 100% and 200% of Medicare), compare it to the hospital's cash-pay discount, and test whether your household income falls under the charity care threshold, commonly expressed as a multiple of the federal poverty level. It then shows the saving against the billed amount and what a monthly interest-free payment plan would look like. Always request an itemised bill first: duplicate charges and services never rendered are common, and correcting them costs nothing.

FormulaTarget = max(Medicare Rate × Multiple, Billed × (1 − Cash Discount)). Charity Care applies a further reduction when income ÷ FPL is under the threshold.

Worked example

Using the values the calculator loads with:

Inputs

Amount billed: 14000 $
Medicare allowable for the service: 3200 $
Target multiple of Medicare: 1.5 ×
Hospital self-pay discount: 40 %
Household income: 55000 $
Federal poverty level for your household: 21000 $
Charity care threshold: 3 × FPL
Payment plan length: 24 months

Results

Negotiation target: $3,295
Saving vs billed amount: $10,705
Reduction achieved: 76.5%
Interest-free monthly payment: $137
Medicare-based benchmark: $4,800
Income as share of poverty level: 262%

What each field means

Inputs

Amount billed ($): The amount billed used in the calculation, measured in $. Starts at 14000 $ so you have a working example on load. Accepted range: 50–500000 $.
Medicare allowable for the service ($): The medicare allowable for the service used in the calculation, measured in $. Starts at 3200 $ so you have a working example on load. Accepted range: 0–200000 $.
Target multiple of Medicare (×): The target multiple of medicare used in the calculation, measured in ×. Starts at 1.5 × so you have a working example on load. Accepted range: 1–4 ×.
Hospital self-pay discount (%): The hospital self-pay discount used in the calculation, measured in %. Starts at 40 % so you have a working example on load. Accepted range: 0–90 %.
Household income ($): The household income used in the calculation, measured in $. Starts at 55000 $ so you have a working example on load. Accepted range: 0–500000 $.
Federal poverty level for your household ($): The federal poverty level for your household used in the calculation, measured in $. Starts at 21000 $ so you have a working example on load. Accepted range: 5000–80000 $.
Charity care threshold (× FPL): The charity care threshold used in the calculation, measured in × FPL. Starts at 3 × FPL so you have a working example on load. Accepted range: 1–8 × FPL.
Payment plan length (months): The payment plan length used in the calculation, measured in months. Starts at 24 months so you have a working example on load. Accepted range: 1–60 months.

Results

Negotiation target: Returned as a money amount in US dollars and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
Saving vs billed amount: Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
Reduction achieved: Returned as a percentage. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
Interest-free monthly payment: Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
Medicare-based benchmark: Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
Income as share of poverty level: Returned as a percentage. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.

FAQ

Where do I find the Medicare rate?

CMS publishes physician fee schedule and hospital outpatient payment rates by code and locality, and many hospitals now post machine-readable price files under federal transparency rules. Use the CPT or DRG code from your itemised bill.

Is charity care only for the uninsured?

No. Nonprofit hospitals must offer financial assistance and many policies cover insured patients whose out-of-pocket balance is large relative to income. Ask for the financial assistance policy in writing.

Should I pay anything before negotiating?

Request the itemised bill and the assistance application first. Paying in full removes your leverage, and a partial payment can restart collection clocks in some states.

What about surprise out-of-network bills?

The federal No Surprises Act protects most emergency care and many out-of-network services at in-network facilities. If your bill fits that pattern, dispute it under that law before negotiating a discount.

Accuracy and limitations

Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.

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Cite this calculator

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APA

RevenueLab. (2026). Medical Bill Negotiation Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/medical-bill-negotiation-calculator

HTML

<p>Source: <a href="https://www.revenuelab.fyi/toolbox/medical-bill-negotiation-calculator" target="_blank" rel="noopener">Medical Bill Negotiation Calculator — RevenueLab</a> (2026).</p>

Markdown

Source: [Medical Bill Negotiation Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/medical-bill-negotiation-calculator) (2026).