Use this calculator to estimate what a Las Vegas family court judge may order for spousal support — then read below to understand exactly how Nevada alimony works, what factors the court weighs, and what the Tonopah Formula means for your case.

How Is Alimony Calculated in Nevada?

Nevada does not use a mathematical formula to calculate alimony. Unlike child support, which follows a tiered percentage formula under NAC 425.140, spousal support in Nevada is entirely discretionary. Under NRS 125.150, a judge may award alimony to either spouse “in a specified principal sum or as specified periodic payments, as appears just and equitable.”

In practice, this means two divorces with identical incomes can produce very different alimony awards depending on how a judge weighs the statutory factors. This is why alimony is one of the most unpredictable areas of Nevada family law — and why having a Las Vegas divorce attorney who understands how local judges apply these factors is critical.

The 11 Factors Nevada Judges Must Consider (NRS 125.150)

When deciding whether to award alimony and how much, Nevada law requires the court to consider all of the following factors. No single factor is dispositive, and judges are not required to weigh them in any particular order.

The Nevada Supreme Court confirmed in Kogod v. Cioffi-Kogod, 135 Nev. Adv. Rep. 9 (2019), that a judge must consider all 11 factors and that a large income gap alone is not enough to justify an alimony award. The award must meet the receiving spouse’s economic needs or compensate for economic losses resulting from the marriage and divorce. The court also held that marital fault or misconduct cannot be considered.

What Is the Tonopah Formula?

The Tonopah Formula is an unofficial alimony guideline created by the Family Law Section of the Nevada State Bar in 1997. It was designed to standardize alimony awards across the state by assigning mathematical weight to key factors based on 20 years of Nevada alimony decisions. The formula was scheduled for a legislative vote that never occurred — so it was never adopted as law.

Despite this, many Clark County Family Court judges use the Tonopah Formula as a starting point when calculating alimony. The formula works by multiplying the income difference between spouses by a cumulative percentage derived from marriage length, each spouse’s age, education level, and disability status. This produces both a monthly amount and a suggested duration.

There are two common versions of the Tonopah Formula — one based on gross income and one based on net income. The calculator above incorporates the Tonopah approach. However, judges are free to deviate from it based on the 11 statutory factors, and many do. The formula should be treated as one data point, not a guarantee.

The “1/3 Rule” in Alimony

Some attorneys simplify the Tonopah approach as the “1/3 rule” — the idea that alimony should equal roughly one-third of the difference between the spouses’ incomes. This is a loose approximation, not a legal rule. The actual Tonopah calculation uses a cumulative percentage that varies based on marriage length, age, education, and disability — so the percentage could be well below or above 33% depending on the facts. For a short marriage between two young spouses with comparable education, the Tonopah percentage might be 10–15%. For a 25-year marriage where one spouse has a disability and limited education, it could exceed 40%. The “1/3 rule” is a useful shorthand for cocktail-party math, but courts do not apply it mechanically.

Four Types of Alimony in Nevada

Nevada courts can award four distinct types of spousal support, each serving a different purpose.

1. Temporary Spousal Support (Pendente Lite)

Awarded during the divorce proceedings under NRS 125.040 to maintain the status quo while the case is pending. This is especially common when one spouse controls all income-producing community property. In Engebretson v. Engebretson, the Nevada Supreme Court upheld temporary alimony to a wife with no income even though she had separate property — courts focus on practical financial realities, not whether the recipient could theoretically liquidate assets.

2. Temporary (Fixed-Term) Alimony

The most common form of post-divorce alimony. It has a set end date and is designed to help the lower-earning spouse transition to financial independence. Duration typically correlates with the length of the marriage.

3. Permanent Alimony

Has no expiration date. This is typically reserved for long-term marriages (often 20+ years) where the recipient spouse cannot realistically become self-supporting due to age, health, or having been out of the workforce for an extended period. In Schwartz v. Schwartz, 126 Nev. 87 (2010), the Nevada Supreme Court held that lump-sum alimony must be considered as an alternative when the obligor is elderly, wealthy, and in poor health.

4. Rehabilitative Alimony

Specifically for education or job training. Under NRS 125.150(10), the court must consider whether one spouse obtained greater job skills or education during the marriage while the other provided financial support. If awarded, the court must specify the timeframe for the recipient to begin training and set conditions for termination if the recipient fails to follow through.

Alimony Calculation Examples

Because Nevada has no fixed formula, these examples show how the Tonopah approach might apply. Actual awards vary based on the judge and the full set of statutory factors.

These estimates are starting points only. A judge may award significantly more or less based on the homemaker contribution, health of both spouses, property division, and standard of living during the marriage. A Las Vegas spousal support attorney can build the strongest argument based on your specific facts.

How Long Does Alimony Last in Nevada?

Nevada law does not prescribe a specific duration for alimony. However, Clark County judges commonly use the marriage length as the primary benchmark. A rough guideline many attorneys observe:

These are rough benchmarks — not rules. A 12-year marriage where one spouse was a full-time homemaker with no marketable skills could produce a longer award than these guidelines suggest. Conversely, a 25-year marriage where both spouses have comparable incomes may produce no alimony at all.

Tax Treatment of Alimony in Nevada (Post-2018)

The Tax Cuts and Jobs Act (TCJA) fundamentally changed the tax treatment of alimony for all divorce agreements executed after December 31, 2018. Under current federal law, alimony payments are not tax-deductible for the paying spouse and are not considered taxable income for the receiving spouse. This is a significant shift from pre-2019 rules, where the payer could deduct alimony and the recipient reported it as income.

This change directly affects negotiation strategy. Before 2019, a higher alimony payment could be partially offset by the payer’s tax deduction. Now, every dollar of alimony is a full after-tax dollar for both sides. If your divorce was finalized before January 1, 2019, the old rules still apply unless the agreement is modified and the modification specifically states the new tax rules apply.

Modifying or Terminating Alimony in Nevada

Under NRS 125.150(8), alimony that has already accrued (past-due payments) cannot be modified. Future payments can be modified upon a showing of changed circumstances, whether or not the original decree retained jurisdiction for modification.

A 20% or greater change in gross monthly income of the paying spouse automatically constitutes changed circumstances requiring a modification review under NRS 125.150(12). Other changed circumstances that may justify modification include job loss, serious illness, retirement, or a significant change in the recipient’s financial situation.

Alimony automatically terminates upon the death of either spouse or the remarriage of the recipient, unless the original court order specifies otherwise. Cohabitation by the recipient with a new partner does not automatically terminate alimony in Nevada, but it may serve as evidence of changed circumstances supporting a modification request.

What Happens If a Spouse Stops Paying Alimony?

Failure to pay court-ordered alimony is a crime in Nevada under NRS 201.020. The penalties mirror those for failure to pay child support:

If less than $10,000 is owed, it is a misdemeanor punishable by up to 6 months in jail. If $10,000 or more is owed, it is a category C felony punishable by up to 5 years in prison. A family court judge may also hold the non-paying spouse in contempt of court, which carries its own penalties including fines and jail time.

If your former spouse has stopped making alimony payments, a spousal support attorney can file a motion for contempt and seek enforcement through the court.

Lump-Sum Alimony in Nevada

Instead of monthly payments, a court may award alimony as a single principal sum. Lump-sum alimony is particularly relevant when there are concerns about the paying spouse’s ability or willingness to make ongoing payments. In Schwartz v. Schwartz, 126 Nev. 87 (2010), the Nevada Supreme Court held that lump-sum alimony is a mandatory consideration when the obligor is elderly, wealthy, and in poor health — because monthly payments become meaningless if the payer dies before the obligation is fulfilled.

Lump-sum awards also have practical advantages: they provide a clean break, eliminate future modification disputes, and remove the risk of non-payment. The tradeoff is that the recipient receives less overall (due to present-value discounting) and gives up the ability to seek an increase if circumstances change.

How Alimony Interacts with Child Support

Alimony and child support are separate obligations, but they affect each other. Under Nevada law, child support is calculated first based on the parent’s gross monthly income using the tiered formula in NAC 425.140. Alimony is then calculated from the income remaining after child support deductions. This means the amount of child support paid directly reduces the income available for alimony calculations under the Tonopah Formula.

If you have both child custody and alimony issues, the two must be analyzed together to understand the full financial picture. Our financial disclosure forms help ensure all income and expenses are accurately documented for both calculations.

Can a Prenuptial Agreement Eliminate Alimony?

Yes, in most cases. NRS 125.150 explicitly states that its alimony provisions do not apply if they are “contrary to a premarital agreement between the parties which is enforceable pursuant to chapter 123A of NRS.” A valid prenuptial agreement can waive alimony entirely, cap the amount, or set specific terms. However, a court may refuse to enforce a prenuptial agreement if it was unconscionable at the time of execution or if enforcement would leave one spouse destitute. If you are considering a divorce and have a prenuptial agreement, an attorney should review it before assuming alimony is off the table.

Frequently Asked Questions About Nevada Alimony

How much is alimony in Nevada?

There is no fixed amount. Nevada does not use a mandatory formula. The court weighs 11 factors under NRS 125.150(9) including income disparity, marriage length, standard of living, and each spouse’s earning capacity. Many judges use the unofficial Tonopah Formula as a starting point, which multiplies the income difference by a cumulative percentage based on marriage duration, age, education, and disability. Use the calculator above for an estimate based on the Tonopah approach.

What is the Tonopah Formula for alimony in Nevada?

The Tonopah Formula was created by the Family Law Section of the Nevada State Bar in 1997 to standardize alimony awards. It calculates a monthly amount by taking the income difference between spouses and multiplying it by a cumulative percentage derived from the marriage length, each spouse’s age, education level, and disability status. The formula also produces a suggested duration. It was never adopted as law, but many Clark County judges use it as a guideline.

What is the 1/3 rule in alimony?

The “1/3 rule” is an informal guideline suggesting that alimony should equal roughly one-third of the difference between the spouses’ incomes. This is not a Nevada law or court rule — it is a simplified approximation that some attorneys reference as a starting point. The actual calculation in Nevada depends on the 11 statutory factors and, if the Tonopah Formula is used, on marriage length, age, education, and disability in addition to income.

How long does alimony last in Nevada?

There is no statutory formula for duration. A common guideline used by attorneys and some judges is roughly 1 year of alimony for every 3 years of marriage. Short marriages (under 3 years) rarely produce alimony. Marriages of 10–20 years typically result in 3–7 years of support. Marriages over 20 years may result in permanent alimony if the recipient cannot become self-supporting. Duration depends heavily on the specific facts of the case.

Does adultery affect alimony in Nevada?

No. Nevada is a no-fault divorce state, and the Nevada Supreme Court held in Kogod v. Cioffi-Kogod (2019) that a court “must not consider the marital fault or misconduct, or lack thereof, of the spouses” when determining alimony. Adultery, abuse, or other misconduct cannot increase or decrease an alimony award under Nevada law.

Is alimony taxable in Nevada?

For all divorces finalized after December 31, 2018, alimony is not tax-deductible for the payer and not taxable income for the recipient under federal law. Nevada has no state income tax, so there is no state-level alimony tax impact. Divorces finalized before January 1, 2019 follow the old rules (deductible for payer, taxable for recipient) unless the agreement is modified to adopt the new rules.

Can I get alimony if I was a stay-at-home parent?

Yes, and this is one of the strongest scenarios for an alimony award. Factor #9 under NRS 125.150 specifically requires the court to consider the “contribution of either spouse as homemaker.” If you left the workforce to raise children and manage the household while your spouse built a career, the court will weigh that sacrifice heavily. Rehabilitative alimony to cover job training or education is also specifically contemplated under NRS 125.150(10).

Does cohabitation end alimony in Nevada?

Not automatically. Unlike some states, Nevada does not have a statute that terminates alimony upon the recipient’s cohabitation with a new partner. However, cohabitation may serve as evidence of changed financial circumstances — particularly if the new partner is contributing to the recipient’s living expenses. The paying spouse would need to file a motion to modify and demonstrate that the recipient’s financial needs have materially changed.

Can alimony be modified after the divorce is final?

Yes, future payments can be modified upon a showing of changed circumstances under NRS 125.150(8). A 20% or greater change in the paying spouse’s gross monthly income automatically qualifies as changed circumstances. Past-due payments that have already accrued cannot be modified retroactively. If the original decree or settlement agreement states that alimony is non-modifiable, the court generally cannot change it.

What happens if my ex stops paying alimony?

Failure to pay court-ordered alimony is a crime under NRS 201.020. Arrears under $10,000 are a misdemeanor (up to 6 months in jail). Arrears of $10,000 or more are a category C felony (up to 5 years in prison). You can also file a motion for contempt in family court, which can result in additional penalties, wage garnishment, or asset seizure. Contact a spousal support attorney to begin enforcement.

Is Nevada a 50/50 state for alimony?

Nevada is a community property state, which means marital assets are divided equally (50/50) in most cases. However, alimony is separate from property division. Alimony is based on the 11 factors under NRS 125.150 and the court’s determination of what is “just and equitable.” The property division a spouse receives (Factor #10) is considered when calculating alimony — if one spouse receives a larger share of community property, the court may reduce the alimony award accordingly.

Reviewed by Jennifer Setters, Esq. | Managing Attorney, Gastelum Attorneys | Licensed in Nevada | Last updated February 2026

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