Alimony Calculator
Estimate spousal support payments based on both incomes, marriage duration, and country-specific formulas. See monthly alimony, estimated duration, total lifetime cost, and post-alimony income comparison — all calculated privately in your browser.
How Alimony Is Calculated
Alimony, also called spousal support or spousal maintenance, is a financial payment one spouse makes to the other after separation or divorce. The calculation method varies significantly by country and jurisdiction. In the United States, most states use a formula based on the income difference between spouses, typically awarding 30 to 40 percent of the gap between the higher and lower earner's gross income. Courts cap the recipient's post-alimony income so it does not exceed roughly 40 percent of the combined household income. Duration depends on how long the marriage lasted — short marriages of under five years may result in alimony lasting only one to two years, while marriages over 20 years may qualify for permanent support.
In the United Kingdom, courts follow a needs-based approach rather than a fixed formula. A common guideline divides the combined income into thirds, with the recipient receiving enough to bring their income up to one-third of the total. UK courts increasingly favor "clean break" settlements where a lump sum or time-limited payments replace ongoing maintenance. Canada uses the Spousal Support Advisory Guidelines (SSAG), which calculate a range based on 1.5 to 2 percent of the income difference per year of marriage, capped at 50 percent of the difference. Australia has no set formula and relies on the court's assessment of reasonable needs, standard of living during the marriage, and each party's earning capacity.
Types of Alimony
There are several types of spousal support, each designed for different circumstances. Temporary alimony (pendente lite) is paid during the divorce proceedings to maintain the lower earner's standard of living until the final order. Rehabilitative alimony is short-term support intended to help the recipient become self-supporting through education, job training, or career development. This is the most commonly awarded type and usually has a specific end date. Permanent alimony continues indefinitely until the recipient remarries, either party dies, or circumstances change substantially. It is most common after long marriages (20+ years) where one spouse sacrificed career advancement. Lump sum alimony is a one-time payment instead of ongoing monthly support, useful when the payer wants a clean break or has assets but irregular income. Reimbursement alimony compensates a spouse who supported the other through education or professional training with the expectation of shared future benefits.
Factors Courts Consider for Spousal Support
Beyond income and marriage duration, courts evaluate multiple factors when determining alimony. The age and health of both spouses play a role — an older spouse with health issues may receive higher or longer support. The standard of living established during the marriage sets a benchmark that courts try to maintain for both parties. Each spouse's earning capacity matters more than current income — a spouse with a professional degree who chose not to work may receive less because they could earn more. Contributions to the marriage, including homemaking and child-rearing, are valued even if they were not monetary. The presence of children can increase alimony amounts in some jurisdictions, as the custodial parent often faces higher expenses and reduced work availability. Courts may also consider marital misconduct in some states, though many jurisdictions have moved to no-fault divorce systems where conduct is irrelevant to support calculations.
Alimony Tax Rules
Tax treatment of alimony varies by country and has undergone significant changes. In the United States, the Tax Cuts and Jobs Act of 2017 (effective for divorces finalized after December 31, 2018) eliminated the tax deduction for alimony payers and made alimony payments tax-free for recipients. For divorces finalized before 2019, the old rules still apply: payers deduct alimony from taxable income, and recipients report it as income. In Canada, spousal support remains tax-deductible for the payer and taxable income for the recipient, which significantly affects the net cost of payments. In the United Kingdom, maintenance payments are made from after-tax income and are not taxable for the recipient. Australia follows a similar approach where spousal maintenance is paid from after-tax income. Understanding these tax implications is essential for accurately assessing the true financial impact of alimony on both parties. Always consult a tax professional for advice specific to your situation, as rules may change and individual circumstances vary.
Frequently Asked Questions
How is alimony calculated in the US?
Most US states use a formula based on the income difference between spouses. A common approach awards roughly 33% of the difference between the higher and lower earner's gross income as monthly alimony. Courts also cap the recipient's total income (their earnings plus alimony) so it does not exceed about 40% of the combined household income. Duration is tied to marriage length — shorter marriages yield shorter support periods, while 20+ year marriages may result in permanent alimony. Each state has its own guidelines, so amounts vary by jurisdiction.
How long does alimony last?
Alimony duration depends heavily on marriage length and jurisdiction. For marriages under 5 years, support typically lasts 1 to 2 years. For marriages of 5 to 10 years, expect 2 to 5 years. For 10 to 20 year marriages, support may last 6 to 13 years. Marriages over 20 years may qualify for permanent alimony that continues until remarriage, death, or a substantial change in circumstances. Rehabilitative alimony has a set end date, while temporary alimony ends when the divorce is finalized.
Is alimony taxable income?
In the US, for divorces finalized after December 31, 2018, alimony is NOT tax-deductible for the payer and NOT taxable income for the recipient, due to the Tax Cuts and Jobs Act. For pre-2019 divorces, the old rules apply (deductible for payer, taxable for recipient). In Canada, alimony is deductible for payers and taxable for recipients. In the UK and Australia, maintenance is paid from after-tax income and is not taxable for the recipient.
Can alimony be modified after divorce?
Yes, alimony can typically be modified if there is a substantial change in circumstances. This includes significant changes in either party's income, the recipient's remarriage or cohabitation with a new partner, serious illness or disability, retirement of the payer, or job loss. Either party can petition the court for a modification. However, lump sum alimony and some contractual agreements may not be modifiable. The specific rules vary by state and country.
What is the difference between alimony and child support?
Alimony (spousal support) is paid to a former spouse to help maintain their standard of living after divorce. Child support is paid specifically for the care and expenses of the children. The key differences: child support is calculated based on the children's needs and is mandatory when children are involved, while alimony is based on spousal income disparity and is not always awarded. Child support ends when children reach adulthood (typically 18-21), while alimony duration varies. Child support takes priority over alimony in most jurisdictions.
Does adultery affect alimony?
It depends on the jurisdiction. In no-fault divorce states (most US states), adultery generally has no impact on alimony calculations. However, some states like North Carolina, Georgia, and Virginia still consider marital misconduct as a factor. In some jurisdictions, adultery by the recipient can reduce or eliminate alimony, while adultery by the payer may increase the award. In the UK, Canada, and Australia, conduct is generally not a factor in maintenance decisions, as these countries focus on financial needs rather than fault.