An offer in compromise (OIC) settles tax debt for less than the full amount; an installment agreement (payment plan) extends the time to pay the full balance. The comparison is not about which option is "better" — it is about which facts you have verified, which questions remain open, and where professional judgment is still required. IRS guidance states an OIC is generally not accepted if the debt can be paid in full through a payment plan and/or asset equity (IRS offer in compromise), so the documented facts on both sides drive the analysis.
Build an options review matrix
Capture each row before anyone drafts figures. This is a working sheet, not a qualification calculator.
| Row | Offer in compromise | Installment agreement |
|---|---|---|
| Core question | Can less than the full amount settle the debt, given income, expenses and asset equity? | Can the balance be paid in full over an extended period? (IRS payment plans) |
| Evidence set | Household or business financial data prepared for the offer form | Current financial picture where the current route requires it |
| Preliminary checks | Required returns filed, required estimated payments made, no open bankruptcy | Filing and payment status plus current route requirements confirmed |
| Open question | What do current asset equity and disposable results actually show? | What monthly amount is realistic without failing later? |
| Owner and date | Named preparer, date verified | Named preparer, date verified |
A third status sits alongside both and must not be folded into either column. Currently Not Collectible (CNC) status temporarily delays collection for financial hardship: most collection activity is suspended, but the full debt remains and interest and penalties continue to accrue (CNC financial review guide; IRS: temporarily delay the collection process). The IRS may request a financial statement such as Form 433-F, 433-A or 433-B, and may review finances and resume collection if ability to pay improves. No fixed duration applies, and it is not forgiveness.
Keep the paths separate
Evidence differs by path. For an offer, the current Form 656-B booklet supplies the forms and step-by-step instructions; the Form 433-A (OIC) is expressly for use with Form 656 and is not interchangeable with plain Form 433-A (Form 433-A (OIC) evidence guide, current form). A calculated amount is not acceptance. For a payment plan, not every plan requires a financial statement — check the current request and route. For a business, plain Form 433-B collects business information and is not the OIC version (Form 433-B evidence guide, current form). If you are still choosing a tool to prepare the underlying worksheets, see how to evaluate financial casework software.
Worked example (synthetic)
A preparer has a household case with incomplete statements. Applying the offer multipliers or standards from memory produced a figure. Reopening the file showed: one account statement missing, a self-employment figure present only on the wage statement, and an expense category marked "standard" without a source. The useful output was not a number — it was a list of three unsupported inputs and the owner assigned to each. Once the statements arrived, the preparer documented remaining questions, including whether asset equity changes the analysis, and recorded that the file had not been assessed for eligibility.
Checklist before review
- [ ] Confirm which path the current request actually calls for, using the current IRS form or booklet rather than a previous case file.
- [ ] List every figure with its source document and date; mark anything unverified as unknown rather than estimating.
- [ ] Separate asset equity, income and expenses from the household or entity boundary so balances are not double counted.
- [ ] Note that financial need alone does not establish OIC acceptance, and that interest and penalties may continue while a balance remains under a payment plan.
- [ ] Record who makes the final call and what evidence is still outstanding.
Which is cheaper for a taxpayer with low income?
Low income alone does not settle it. IRS considers income, expenses and asset equity for an offer, and generally does not accept one if the debt can be paid in full through a payment plan and/or asset equity.
Does everyone need a Form 433-F?
No. Not every installment agreement requires a financial statement, and the CNC page lists 433-F, 433-A or 433-B as possible requests. Use the current route and request (Form 433-F instructions).
Does a completed 433-A (OIC) get the offer accepted?
No. Completing the form or calculating an amount does not establish acceptance; the current Form 656-B booklet governs what is filed and how.
If your firm wants this workflow reviewed end to end — authorization, transcripts and CRM handoff alongside the options matrix — 26T1's published worksheet page is marked “Coming next” and describes planned support for collaborative collection of financial details, supporting evidence and reviewed totals (26T1 Income & Expense Worksheet).
Discuss your firm’s authorization, transcript and CRM workflow in a 26T1 demo.