The three grounds, and why one of them carries almost every case
The IRS will only consider an Offer in Compromise on one of three legal grounds: doubt as to collectibility, doubt as to liability, or effective tax administration. Doubt as to liability means you genuinely dispute that you owe the tax, which is rare once an assessment is final. Effective tax administration covers the narrow case where you could technically pay but doing so would create economic hardship or be unfair given your circumstances, such as a serious, ongoing medical condition. The overwhelming majority of offers, including nearly every one our office files, rest on doubt as to collectibility: you owe the money, the IRS agrees you owe it, and the only question is whether the government could ever actually collect the full balance before the collection statute runs out.
That framing matters because it tells you what the IRS is actually evaluating. It is not asking whether the debt feels fair. It is asking, in dollar terms, what it could squeeze out of you through a levy, a lien, or a wage garnishment over the time it has left to collect. That number has a name.
Reasonable Collection Potential: the formula behind the number
Reasonable Collection Potential, or RCP, is the floor the IRS will not go below. It has two components. The first is net realizable equity: what you would net from selling every asset you own, generally calculated at 80 percent of fair market value to account for a quick-sale discount, minus any loans secured against it. The second is future income, meaning what is left over each month after your income is measured against the IRS's allowable expense standards, then multiplied out over a fixed window. Add the two together and you have RCP. If that number sits below your total tax debt, you have a mathematical basis for a settlement. If it does not, filing an offer is mostly a way to spend a $205 fee and several months waiting for a predictable rejection.
The expense side is where most self-filed offers go wrong. The IRS caps allowable monthly expenses using National and Local Collection Financial Standards, covering categories like housing, utilities, transportation, and food. Spend more than the standard allows and the excess typically does not reduce your RCP, it just raises the number the IRS thinks you can pay. Knowing where those standards can be argued against, and where they cannot, is most of the actual skill in building a defensible offer.
Lump sum versus periodic payment, and why the choice changes the math
The IRS gives you two ways to structure payment, and the choice is not cosmetic, because it changes the income multiplier inside the RCP formula itself. A Lump Sum Cash Offer requires 20 percent of your proposed amount with the application, with the rest paid in five or fewer installments within five months of acceptance; it uses 12 months of future income in the calculation. A Periodic Payment Offer requires your first proposed installment with the application and continuing monthly payments while the IRS reviews the case, but it uses 24 months of future income, which generally produces a higher settlement number. Most taxpayers come out ahead with the lump sum option for that reason alone. The catch is finding 20 percent of the offer amount up front, which often means a short-term loan from family, a retirement account withdrawal, or refinancing a vehicle. We model both scenarios with actual numbers before recommending either one.
Filing compliance: the gate before the math even matters
Before the IRS calculates anything, it checks one thing: are you current. Every tax return you were legally required to file has to be filed. Current-year estimated tax payments need to be up to date. If you run a business with employees, your federal payroll tax deposits have to be current as well. Miss any one of those and the Service will return the offer, unopened in any practical sense, without ever reaching the Reasonable Collection Potential analysis. We see this constantly: a taxpayer with a genuinely strong case for settlement loses months because three years of returns were never filed, and the offer bounced back before anyone at the IRS evaluated the actual numbers.
The paperwork is not a formality
Form 656 is the application itself, but it is the shortest document in the package. Individuals also file Form 433-A (OIC), a detailed financial statement; businesses file Form 433-B (OIC). The supporting file behind those two forms routinely runs 80 to 200 pages: three months of bank statements, pay stubs, retirement account statements, vehicle valuations, home equity worksheets, profit and loss statements for a business, accounts receivable aging, and documentation for every expense you are claiming. The IRS examiner working your file will cross-check these numbers against each other, and an inconsistency, a bank balance that does not match a stated expense, an asset left off the 433-A that shows up on a credit report, is a common reason an otherwise sound offer gets kicked back for more information or rejected outright.
What happens after you file
Once the Centralized Offer in Compromise unit in Brookhaven or Memphis receives a complete offer, a clock starts running under Internal Revenue Code Section 7122(f): if the IRS has not rejected, returned, or withdrawn the offer within 24 months, it is deemed accepted by operation of law. In practice, this provision rarely ends up mattering, because the IRS usually acts well inside that window, and a returned offer, even one returned close to the deadline, still counts as a rejection rather than a lapse into automatic acceptance. Treat the 24-month rule as a backstop, not a strategy.
While an offer is pending, the IRS generally suspends active collection on the specific liability at issue, meaning no new levies on that debt while the case is under review. That is a real benefit even for an offer that ultimately gets countered or rejected, which is one reason a properly prepared offer can be worth filing even when the odds are not overwhelming, and one reason a weak offer filed just to buy time can backfire once the IRS catches on to the pattern.
When an Offer in Compromise is the wrong tool
Not every collectibility problem calls for an OIC. If your RCP is close to zero because your income barely covers the IRS's own expense standards and you have no meaningful equity, Currently Not Collectible status may get you the same practical relief, no active collection, without the fee, the 12 or 24-month financial snapshot, or the public record of having filed. If your income is simply too high relative to a manageable payment, but you are not able to pay the full balance before the collection statute runs, an installment agreement, streamlined or partial-pay, might resolve the case faster and with less paperwork. Part of what a tax attorney actually does in the first consultation is rule out the programs that look appealing but do not fit the numbers, rather than defaulting to the one clients have heard of.
A note for Central Valley taxpayers
We file these offers for clients across the region, and the pattern repeats regardless of the city: a Clovis small business owner with equity tied up in equipment, a retiree in the foothills living on a fixed income with modest savings, a self-employed contractor whose RCP swings heavily on how allowable business expenses get documented. The formula does not change by zip code. What changes is how carefully the asset and expense sides get built, and that is where an accepted offer and a rejected one usually diverge. Firms elsewhere, such as River City Tax Law in Chattanooga, work from the same IRS standards.
Handle it yourself or bring in a tax attorney
Nothing stops a taxpayer from filing Form 656 directly. The risk is not the form, it is the 80 to 200 pages behind it, and the fact that a single overlooked asset or an expense pegged above the IRS standard can turn a strong case into a counter-demand you cannot afford, after months of waiting. We model the RCP calculation before we ever file, so a client knows roughly what number the IRS is likely to land on and whether the program is worth pursuing at all, before spending the fee and the wait on an offer that was never going to work.