StateTally

Oregon Alimony Calculator (2026)

Oregon law (ORS 107.105(1)(d)) recognizes three types of spousal support—transitional, compensatory, and maintenance—each evaluated under a set of statutory factors. Because the state has no fixed alimony formula, courts often start with the American Academy of Matrimonial Lawyers rule of thumb: 30% of the higher earner’s gross income minus 20% of the lower earner’s gross income, limited so the recipient’s total income does not exceed 40% of the combined income, with duration tied to marriage length. This estimate is for guidance only, not a legal ruling.

Reviewed 2026-09-02 · Estimates only — not legal or financial advice.

Oregon has no statutory alimony formula. Courts decide case by case under ORS 107.105(1)(d). The calculator below shows a widely used rule of thumb (the AAML guideline) as a negotiation starting point — it is not the law and a judge may land anywhere the factors justify.
Before taxes.
Before taxes.
The law behind this calculator: Oregon spousal support (transitional, compensatory, maintenance) — ORS 107.105(1)(d).

How Oregon calculates it

  • Identify the higher‑earning spouse’s annual gross income and calculate 30% of that amount.
  • Identify the lower‑earning spouse’s annual gross income and calculate 20% of that amount.
  • Subtract the lower‑earner’s 20% figure from the higher‑earner’s 30% figure to get a preliminary support amount.
  • Apply the 40% cap so the recipient’s total income (own income plus support) does not exceed 40% of the combined incomes of both spouses.
  • Determine the support duration: 30% of marriage length if under 3 years, 50% if 3–10 years, 75% if 10–20 years, and indefinite if over 20 years.

Worked example

Higher earner $100,000/year, lower earner $40,000/year, 12-year marriage: 30% × $100,000 = $30,000; 20% × $40,000 = $8,000; difference $22,000/year, reduced to $16,000 by the 40% cap ≈ $1,333/month as a rule-of-thumb starting point. Duration guide for 12 years (10–20 years): 75% of 144 months ≈ 108 months. The court is not bound by any of this.

Frequently asked questions

How long can I expect alimony to last in Oregon for a 12‑year marriage?

For marriages between 10 and 20 years, the rule‑of‑thumb suggests a duration of 75% of the marriage length, which would be about 108 months for a 12‑year marriage, though the court may adjust it.

Is alimony taxable in Oregon?

Oregon follows federal treatment: alimony received is taxable to the recipient and, for divorces finalized before 2019, deductible by the payer; after 2019, the deduction no longer applies, and Oregon does not impose a separate state tax on alimony.

What does the 40% income cap mean for my support amount?

The cap limits the recipient’s total income—including any earned income plus the alimony—to no more than 40% of the combined gross incomes of both spouses.

What’s the difference between transitional, compensatory, and maintenance support in Oregon?

Transitional support helps the lower‑earning spouse adjust after separation; compensatory support addresses economic disparities caused by the marriage; maintenance (or long‑term) support is intended for spouses who cannot become self‑supporting, typically in longer marriages.

Has Oregon changed its alimony guidelines recently?

No statutory formula has been adopted; Oregon courts continue to apply the statutory factors in ORS 107.105 and may use the AAML rule‑of‑thumb as a reference, but there have been no recent legislative changes to the guidelines.

Is the calculation different in Portland, Salem or Eugene?

No. ORS 107.105(1)(d) applies statewide, so courts in Portland, Salem, Eugene and every other county start from the same guideline. Local practice can differ in how judges weigh deviation factors and in typical negotiated outcomes, but the formula on this page is the one used across Oregon.

Embed this calculator

Attorneys, HR teams, and publishers: add this calculator to your own site free — copy the snippet below. Attribution stays visible.

More calculators