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Annual salary. Enter your gross annual salary; enter your spouse's gross annual salary separately.

Estimate your taxable income. Enter your expected total income from wages and other sources (minus any pre-tax contributions to a 401(k) or other retirement plan) and subtract the following:

  • Your standard deduction (for 2013, $12,200 for joint returns, $8,950 for head of household and $6,100 for individual and married filing separate returns) or your total itemized deductions (from Schedule A)
  • Exemptions for yourself, your spouse and dependents ($3,900 each in 2013)
  • Deductible contributions to IRAs (individual retirement accounts), SIMPLE and Keogh plans
  • Job-related moving expenses
  • Any penalty paid on early withdrawal of savings
  • The deduction for 50% of the self-employment tax paid by self-employed taxpayers
  • Alimony payments
  • Up to $2,500 of interest on higher education loans

If you need help, consult last year's tax return. Look for your taxable income on line 43 if you filed IRS Form 1040, on line 27 if you filed Form 1040A or line 6 if you used Form 1040EZ.

Your federal tax rate. Locate your taxable income in the appropriate table below and enter the corresponding tax rate for 2013.

Note: If your taxable income is close to a lower bracket, your flexible spending account contributions could lower your tax rate. Complete the calculator, then add up your expenses, subtract them from your taxable income and check these tables again. If your tax rate changes, re-enter your information using the lower rate.

Single
Married filing jointly or qualifying widow(er)
Married filing separately
Head of household

SINGLE FILERS
If your taxable income is...   Your rate is...
$0 - $8,925   10%
$8,926 - $36,250   15%
$36,251 - $87,850   25%
$87,851 - $183,250   28%
$183,251 - $398,350   33%
$398,351 or more   35%

MARRIED FILING JOINTLY OR QUALIFYING WIDOW(ER)
If your taxable income is...   Your rate is...
$0 - $17,850   10%
$17,851 - $72,500   15%
$72,501 - $146,400   25%
$146,401 - $223,050   28%
$223,051 - $398,350   33%
$398,351 or more   35%

MARRIED FILING SEPARATELY
If your taxable income is...   Your rate is...
$0 - $8,925   10%
$8,926 - $36,250   15%
$36,251 - $73,200   25%
$73,201 - $111,525   28%
$111,526 - $199,175   33%
$199,175 or more   35%

HEAD OF HOUSEHOLD
If your taxable income is...   Your rate is...
$0 - $12,750   10%
$12,751 - $48,600   15%
$48,601 - $125,450   25%
$125,451 - $203,150   28%
$203,151 - $398,350   33%
$398,351 or more   35%

Your state tax rate. Your state tax rate. This is the percent tax rate that will be levied by your state in 2013. Consult your tax records for your state tax rate schedule, or find links to your state tax agency or find links to your state tax agency from the Federation of Tax Administrators.

Estimated dependent care expenses. Total dependent care expenses cannot exceed $5,000, or $2,500 if you’re married and you and your spouse file separate returns.