Married filing jointly vs separately?
Type each spouse’s income, your children, and your ages. The calculator fills in one joint 2026 federal return and two separate ones and shows which costs less.
- Filing jointly saves
- $1,356.00
Filing jointly costs $10,043.00 and filing separately $11,399.00: Married filing jointly saves $1,356.00.
- Better choice
- Married filing jointly
- Difference
- $1,356.00
- Tax filing jointly
- $10,043.00
- Tax filing separately
- $11,399.00
- Your separate return
- $8,776.00
- Spouse’s separate return
- $2,623.00
- Joint marginal rate
- 12%
- Joint child and earned income credits
- $0.00
- Separate child credits
- $0.00
Filing jointly saves: $1,356.00. Filing jointly costs $10,043.00 and filing separately $11,399.00: Married filing jointly saves $1,356.00.
Filing jointly saves by spouse’s wages
The results are estimates for information only. They are not financial, tax, or legal advice. Check the numbers with your lender or a qualified professional before you decide. Terms of use
How to calculate
Compares the 2026 federal tax of a married couple filing one joint return with the total of two separate returns, with each spouse’s income, children, and age.
Example with the default inputs (Your wages $80,000.00, Spouse’s wages $40,000.00, Your other income $0.00, Spouse’s other income $0.00, Children under 17 0, You are 65 or older No, Your spouse is 65 or older No, Tax year 2,026): Filing jointly costs $10,043.00 and filing separately $11,399.00: Married filing jointly saves $1,356.00.
Method: Joint tax = Form 1040 for married filing jointly with both incomes, both age boxes, the children, and the senior deduction. Separate tax = two Forms 1040 for married filing separately, each with that spouse’s income and age box, the children on the return of the spouse who claims them, no earned income credit, and no senior deduction. Each return: standard deduction, Tax Table or rate schedule, child tax credit and its refundable part, earned income credit, Additional Medicare Tax. Filing jointly saves = separate total − joint tax.
- An estimate for tax year 2026 (IRS Rev. Proc. 2025-32 and the 2026 draft Schedule 1-A), not tax advice.
- Both returns take the standard deduction. If one spouse itemizes on a separate return, the other must itemize too; itemized deductions, student loan interest, and the other deductions and credits that filing separately limits are not included.
- Head of household is not offered: a married person can file as head of household only when considered unmarried (lived apart from the spouse for the last 6 months of the year, with a qualifying child).
- Income of each spouse is that spouse’s own; community property states split income differently. Each spouse is at least 25 years old.
- State tax is not included; some states require the same status as the federal return.
Worked examples
Each example is checked against the calculator on every build.
- Your wages $80,000.00, Spouse’s wages $40,000.00 gives Tax filing jointly $10,043.00, Your separate return $8,776.00, Spouse’s separate return $2,623.00, Tax filing separately $11,399.00, Filing jointly saves $1,356.00.Source: Separate $63,900 gives $8,776 and $23,900 gives $2,623 (Rev. Proc. 2025-32 Tables 2 and 3)
- Your wages $60,000.00, Spouse’s wages $60,000.00 gives Tax filing jointly $10,043.00, Your separate return $5,023.00, Tax filing separately $10,046.00, Filing jointly saves $3.00.
- Your wages $150,000.00, Spouse’s wages $0.00, Children under 17 2, On separate returns, the children are claimed by You gives Tax filing jointly $10,940.00, Your separate return $20,559.00, Spouse’s separate return $0.00, Filing jointly saves $9,619.00.Source: Separate $133,900 gives $24,734 less $4,400 plus 0.9% Additional Medicare Tax on $25,000 over $125,000 (Form 8959)
- Your wages $40,000.00, Spouse’s wages $30,000.00, You are 65 or older yes, Your spouse is 65 or older yes gives Tax filing jointly $2,253.00, Your separate return $2,425.00, Spouse’s separate return $1,228.00, Filing jointly saves $1,400.00.
How it works
The calculator fills in three 2026 federal returns: one married filing jointly and two married filing separately. Each return:
- AGI = wages + other income (both spouses on the joint return, each spouse's own on a separate one).
- Standard deduction: $32,200 jointly, $16,100 separately, plus $1,650 for each spouse aged 65 or older on that return.
- Senior deduction (2025 to 2028), joint return only: $6,000 for each spouse aged 65 or older, less 6% of AGI over $150,000. Separate returns cannot take it.
- Taxable income = AGI − standard deduction − senior deduction, not below 0. Tax = the Tax Table below $100,000 (the rate schedule at the middle of the $50 row, rounded to whole dollars), the rate schedule at or above it.
- Child tax credit: $2,200 per child under 17, less $50 per $1,000 (or part) of AGI over $400,000 jointly or $200,000 separately; first against the tax, then the refundable part (the lesser of $1,700 per child and 15% of wages over $2,500). On separate returns all children are on the return of the spouse who claims them.
- Earned income credit: joint return only, from the IRS EIC Table amounts with the children under 17 as qualifying children; with no child, at least one spouse must be under 65.
- Additional Medicare Tax: 0.9% of wages over $250,000 jointly or $125,000 separately.
- Tax after credits = tax − credits + Additional Medicare Tax.
Filing jointly saves = (your separate tax + your spouse's separate tax) − joint tax. A negative number means separate returns cost less.
When the data is out of date
Brackets and deductions change every year. After the 2026 filing season the page keeps using the 2026 tables and says so above the result.
Worked examples by hand
$80,000 and $40,000 of wages, no children. Joint: taxable 120,000 − 32,200 = $87,800; Tax Table row middle $87,825: 10% × 24,800 + 12% × 63,025 = $10,043. Separate: $63,900 taxable (row middle $63,925: 1,240 + 4,560 + 22% × 13,525 = 8,775.50, so $8,776) and $23,900 (row middle $23,925: 1,240 + 12% × 11,525 = $2,623). Separate total $11,399. Filing jointly saves $1,356.
$60,000 each. Joint $10,043 as above. Each separate return: $43,900 taxable, row middle $43,925: 1,240 + 12% × 31,525 = $5,023; together $10,046. Filing jointly saves $3.
$150,000 and $0, two children claimed by the earner. Joint: taxable $117,800, rate schedule: 2,480 + 9,120 + 22% × 17,000 = $15,340, less $4,400 of child credit = $10,940. Separate: taxable $133,900: 1,240 + 4,560 + 12,166 + 24% × 28,200 = $24,734, less $4,400, plus Additional Medicare Tax of 0.9% × (150,000 − 125,000) = $225: $20,559; the spouse owes $0. Filing jointly saves $9,619.
$40,000 and $30,000, both 65 or older. Joint: 70,000 − (32,200 + 3,300) − 12,000 = $22,500 taxable, row middle $22,525: $2,253. Separate: 40,000 − 17,750 = $22,250 (row middle $22,275: 1,240 + 12% × 9,875 = $2,425) and 30,000 − 17,750 = $12,250 (row middle $12,275: $1,228). Filing jointly saves $1,400, mostly the senior deduction.
Other questions people ask
Is it better to file jointly or separately?
For most couples, filing jointly costs less or the same. The joint brackets are twice the single ones up to the 35% rate, the joint standard deduction is twice the separate one, and several credits and deductions are not allowed on separate returns. Separate returns can help when one spouse has large medical bills, wants to keep their tax liability apart, or is on an income-driven student loan plan.
What do you lose by filing separately?
The earned income credit (except for some separated spouses), the education credits, the student loan interest deduction, the new senior deduction, the tips and overtime deductions, and half-size limits for the capital loss deduction, the child tax credit phase-out, and the net investment income tax. If one spouse itemizes, the other must itemize too.
Why is the difference so small for equal incomes?
When both spouses earn about the same and have no children, two separate returns use the same brackets and deductions as one joint return, just halved. The tax is then the same, apart from Tax Table rounding of a few dollars.
Who claims the children on separate returns?
Each child can be claimed by only one spouse. Pick the spouse who claims them; in practice it is usually the one the children lived with longer or the higher earner. The calculator puts all children on one return.
What are the 2026 standard deductions?
$32,200 married filing jointly and $16,100 married filing separately, plus $1,650 for each spouse aged 65 or older (IRS Rev. Proc. 2025-32 section 4.14). Spouses 65 or older on a joint return can also take up to $6,000 each of senior deduction for 2025 to 2028.
Can I change from separate to joint later?
Yes. You can amend separate returns to a joint return within three years of the due date. You cannot change from joint to separate after the due date.