Few events in life have greater tax consequences than changing your marital status. If you file jointly, you're affected by your spouse's income, deductions, and other tax items. If you file separately, you generally cannot take tax credits, such as the child and dependent care credit, and you can't claim the standard deduction unless your spouse does the same. If you live in a community property state, you may have to claim some of your spouse's income and deductions, even when you file separately.
You may have heard of the "marriage tax" or the "marriage penalty." There is no specific tax for married people. The so-called marriage penalty is the higher total tax some taxpayers may pay due to provisions in the tax code.
For example, you can use $3,000 of capital losses to offset ordinary income, such as wages, every year. A single person can deduct up to $3,000 against ordinary income and a married couple together can only deduct up to $3,000 against ordinary income. If the married couple files separately, they can each only deduct $1,500 of capital loss against ordinary income.
Most limits and phase-out ranges are higher for a married couple than for a single person, but they may be less than two times the amounts for a single person. The child tax credit is one example - the credit begins to be phased out for a single person with an income of $200,000 (for 2018). For a married couple, the credit starts to phase out at $400,000 - considerably less than twice the level for single taxpayers.
If you are married and living with your spouse, you must file as married filing jointly or married filing separately. You cannot choose to file as single or head of household. However, if you were separated from your spouse on December 31, 2018 by a separate maintenance decree, you may choose to file as single.
You may be able to file as a head of household instead of as married if you meet certain qualifications to be considered unmarried. You must be a U.S. citizen or resident the entire year, not file with your spouse, pay more than half the cost of keeping up your home during the year, and have your child in your home for more than half of the year. The child must be your dependent, or a child who would have been your dependent except that you released the dependency to the other parent. In addition, your spouse must not have lived in the home during the last six months of the year.
When you get married, it's a good time to check your income tax withholding and make sure you're not having too much - or too little - withheld from your paycheck. It is important to file a new Form W-4, with the Married checkbox selected, with your employer after your marriage. When you do, it may be equally important to adjust the amount of withholding on the Form W-4. For example, if you and your spouse make similar incomes, you may need to have more income tax withheld to avoid a potential tax bill next year.
On the other hand, if your spouse has little or no income, your income tax bill when you file jointly may be considerably less. You may need to have less income tax withheld to avoid having the IRS hold too much of your money all year.
The smart way to fill out your Form W-4 is to estimate your tax liability as closely as possible for the current year, and then have an amount as close to your liability as possible withheld throughout the year. If something changes during the year; for example, if you quit a job or buy a house, you can estimate your tax liability again and make any necessary adjustments.
April 10 — Employees who work for tips
If you received $20 or more in tips during March, report them to your employer. You can use Form 4070.
April 15 — Individuals
File a 2018 income tax return (Form 1040) and pay any tax due. If you want an automatic 6 month extension of time to file the return, file Form 4868, Application for Automatic Extension of Time To File U.S. Individual Income Tax Return. For more information, see Form 4868. Then, file Form 1040 by October 15.
April 15 — Corporations
File a 2018 calendar year income tax return (Form 1120) and pay any tax due. Details
April 15 — Individuals
If you are not paying your 2019 income tax through withholding (or will not pay in enough tax during the year that way), pay the first installment of your 2019 estimated tax. Use Form 1040ES.
April 15 — Household Employers
If you paid cash wages of $2,000 or more in 2018 to a household employee, you must file Schedule H Details
April 15 — Corporations
Deposit the first installment of estimated income tax for 2018 Details
April 15 — Social security, Medicare, and withheld income tax
If the monthly deposit rule applies, deposit the tax for payments in March.
April 15 — Household employers
If you paid cash wages of $2,000 or more in 2018 to a household employee, you must file Schedule H (Form 1040). If you are required to file a federal income tax return (Form 1040), file Schedule H (Form 1040) with the return and report any household employment taxes. Report any federal unemployment (FUTA) tax on Schedule H (Form 1040) if you paid total cash wages of $1,000 or more in any calendar quarter of 2017 or 2018 to household employees. Also, report any income tax you withheld for your household employees.
April 30 — Social security, Medicare, and withheld income tax
File Form 941 for the first quarter of 2018. Deposit or pay any undeposited tax under the accuracy of deposit rules. If your tax liability is less than $2,500, you can pay it in full with a timely filed return. If you deposited the tax for the quarter timely, properly, and in full, you have until May 10 to file the return.
April 30 — Federal unemployment tax.
Deposit the tax owed through March if more than $500.