Every offer in compromise lives or dies on a single number: your reasonable collection potential (RCP). This is the IRS’s estimate of the most it could realistically collect from you — and your offer must meet or beat it. The good news: the formula is not secret. The IRS publishes its allowable expense standards and walks through the calculation in its own guidance. If you understand the math, you can estimate your minimum viable offer before you apply.
This guide breaks the RCP formula into its components, shows a worked example, and flags the judgment calls where cases are won or lost. General information, not tax or legal advice.
The RCP Formula at a Glance
Reasonable collection potential has two components:
RCP = (realizable equity in assets) + (projected future income)
Each component has its own rules, allowances, and multipliers. The IRS computes both, adds them, and that total is the floor for your offer. Offer less, and the examiner will reject it or counter — unless you can show the calculation is wrong.
Component 1: Realizable Equity in Assets
The IRS looks at everything you own and asks: what could this produce if converted to cash? The calculation for each asset is roughly: You document all of this on Form 433-A (OIC).
Equity = (fair market value × quick-sale discount) − secured debts − allowances
Key details:
- Quick-sale discount: the IRS typically discounts asset values to about 80% of fair market value, recognizing that a forced sale does not fetch top dollar.
- Secured debts are subtracted: your mortgage balance comes off your home’s value; your car loan comes off the car’s value.
- Allowances protect basics: the IRS allows you to keep a modest vehicle (up to a published value), basic household goods, and tools needed for your work. Luxury items get no such protection.
- Bank and investment accounts are counted nearly at full value — cash is cash.
- Retirement accounts are generally counted at a discounted rate (reflecting taxes and penalties on early withdrawal), not full face value — but they are not ignored.
- Recently transferred assets can be added back. If you gave property to a relative after the tax debt arose, the IRS may treat it as still yours for RCP purposes.
Component 2: Projected Future Income
This is where most of the money usually is. The formula:
Future income = (monthly income − allowable monthly living expenses) × multiplier
- Monthly income includes wages, self-employment income, Social Security, pensions, rental income — everything.
- Allowable living expenses are NOT your actual spending. The IRS uses national and local standards for categories like food, housing, transportation, and health care. If you spend $800/month on dining out, the IRS allows the food standard — the difference counts as available for the IRS.
- The multiplier depends on your payment option: fewer months of future income are counted for lump-sum offers (typically around 12 months) than for periodic-payment offers (typically around 24 months). This is why lump-sum offers can be lower.
The expense standards are the single most contested part of OIC preparation. Knowing the published standards for your area — and documenting expenses that exceed them for allowable reasons (like high medical costs) — is where good preparation pays off.
Worked Example: Putting It Together
Meet a hypothetical taxpayer, Sam. These are illustrative numbers to show the mechanics:
- Assets: $4,000 in bank accounts; a car worth $9,000 with a $5,000 loan (equity $4,000, within the vehicle allowance, so effectively $0 counted); household goods within allowance ($0). Realizable asset equity: $4,000.
- Income: $4,600/month gross. Allowable living expenses under IRS standards: $4,100/month. Available monthly: $500.
- Lump-sum offer: $4,000 + ($500 × 12) = $10,000 minimum.
- Periodic-payment offer: $4,000 + ($500 × 24) = $16,000 minimum.
If Sam owes $35,000, both options represent real savings — but the lump-sum route saves $6,000 more if Sam can raise $10,000 within five months of acceptance (perhaps via a family loan). This is the strategic core of OIC planning: the payment option you choose changes the minimum.
Where Cases Are Won and Lost
The formula looks mechanical, but judgment calls abound:
- Income averaging for the self-employed. A contractor with volatile income can argue for averaging over a representative period rather than using one flush month. Documentation (profit-and-loss statements, bank records) is everything.
- Future income changes. If you can document that income will drop (an expiring contract, a planned retirement), the examiner can consider it. Speculation does not count; documentation does.
- Allowable expenses above standards. Medical expenses, court-ordered payments, and certain other costs can exceed the standards when documented. Many applicants leave money on the table by not claiming these.
- Asset valuations. The difference between a Zillow estimate and a real appraisal can swing RCP by tens of thousands. Get defensible valuations for major assets.
- Dissipated assets. Money or property disposed of after the liability arose — without fair consideration — gets added back. Do not try to game this; examiners look for it specifically.
Estimating Your Own RCP: A Practical Walkthrough
- List every asset with fair market value, secured debt, and quick-sale value (80%). Subtract debts and allowances.
- Compute monthly income from all sources, averaged over the last 3–6 months if variable.
- Look up the IRS collection financial standards for your household size and area (published on irs.gov). Apply them honestly.
- Subtract allowable expenses from income to get monthly available. If the result is zero or negative, your RCP may be assets-only.
- Multiply by 12 (lump sum) or 24 (periodic) and add asset equity.
- Compare to your total debt. If RCP is well below what you owe, an OIC may be viable — see our eligibility guide. If RCP approaches or exceeds the debt, look at installment agreements instead.
Common Calculation Errors
- Using actual expenses instead of IRS standards. The examiner will substitute the standards. Prepare with them from the start.
- Forgetting the quick-sale discount works both ways. It reduces asset values (good for you) but examiners apply it consistently — do not inflate values hoping for sympathy.
- Ignoring the collection statute. If the 10-year collection window is nearly expired, your future-income component may be limited — a nuance worth professional advice.
- Counting on “effective tax administration.” Hardship-based offers use different logic than the RCP formula. Do not mix the frameworks.
The Examiner’s Perspective: What They Are Really Doing
Understanding the person across the table (or the file) changes how you prepare. The offer examiner is not your adversary — they are an analyst with a caseload, a manual, and performance metrics. Here is what shapes their review:
- They start skeptical of round numbers. An offer of exactly $10,000 on a $60,000 debt, with expenses that land precisely on the standard allowances, looks manufactured. Real finances are messy — document the mess honestly.
- They verify big-ticket items first. Real estate equity, vehicle values, and bank balances get checked against public records and your statements. Small discrepancies in grocery spending do not.
- They have seen every trick. Recently opened “business expenses” that are really personal spending, assets titled to relatives last year, income routed through a new LLC — examiners are trained to spot all of it, and finding it poisons the whole file.
- They can be flexible on close calls. When your documented case is honest and the RCP is genuinely borderline, examiners have discretion. A well-organized, cooperative file earns more of that discretion than a sloppy or evasive one.
- They document everything for review. Their recommendation goes through quality review. Give them clean documentation that makes approval easy to defend.
Negotiating the Number: It Is Not Take-It-or-Leave-It
Many applicants treat the examiner’s first RCP figure as final. It is not — it is an opening position. Effective negotiation tactics:
- Challenge specific line items, not the total. “Your vehicle valuation is wrong; here is a dealer appraisal” beats “your number is too high.”
- Bring new documentation, not new arguments. Examiners respond to evidence: medical bills, repair estimates, pay stubs showing reduced hours.
- Propose the lump-sum switch. If the examiner’s RCP assumes periodic payments, offering to raise a lump sum (family help, asset sale) can cut the future-income multiplier and lower the acceptable amount.
- Know when to appeal instead. If the examiner will not budge on a clearly documented expense, the Independent Office of Appeals offers a fresh, settlement-oriented review. Appeals officers have broader discretion.
- Never negotiate from a non-compliant position. Miss a current-year estimated payment mid-negotiation and you hand the examiner an easy rejection reason.
Frequently Asked Questions
What if the examiner’s RCP differs from mine?
Normal. Examiners apply the standards strictly and may value assets differently. You can negotiate — provide better documentation, challenge valuations with appraisals, and document above-standard expenses. If you cannot agree, you can appeal.
Does RCP change during the review?
It can, if your finances change materially. A new job, an inheritance, or a major expense shift can all move the number. Report material changes honestly; hiding them risks rejection or worse.
Are online OIC calculators reliable?
They give a rough directional read but cannot replicate examiner judgment on expenses, valuations, and multipliers. Use them for screening, not for deciding your offer amount. When real money is at stake, work through the standards yourself or have a qualified professional do it — the calculation is too consequential to outsource to a web form.
Start with the official IRS resources: irs.gov — Offer in Compromise and our OIC explainer.
Disclaimer: General information only, not tax or legal advice. Standards, multipliers, and forms change; verify current figures at irs.gov or consult a qualified tax professional.
