Withholding Allowance: How It Works and When to Update
Summary:
A withholding allowance is a tax exemption that was previously used to reduce the amount of federal income tax withheld from an employee’s paycheck. It was tied to personal exemptions, which allowed taxpayers to lower their taxable income based on factors like dependents and filing status. However, with the 2017 Tax Cuts and Jobs Act, withholding allowances were eliminated from 2018 to 2025, and the W-4 form was redesigned to reflect these changes.
A withholding allowance refers to an exemption that was previously used to reduce the amount of federal income tax an employer deducted from an employee’s paycheck. Employees would submit their W-4 form to indicate how many allowances they were claiming, which would then determine how much tax their employer should withhold. The more allowances claimed, the less tax would be withheld, and vice versa.
However, the introduction of the Tax Cuts and Jobs Act (TCJA) of 2017 changed the rules around withholding allowances by eliminating personal exemptions. As a result, the concept of withholding allowances became obsolete from 2018 through 2025, with the form W-4 being revised to reflect the new tax regulations.
Compare Tax Preparation Services
Compare multiple vetted providers. Discover your best option.
How withholding allowances worked before 2018
Filing Form W-4
Before the TCJA came into effect, individuals would fill out IRS Form W-4 when they started a new job or experienced a significant life event that affected their tax filing status. The form required individuals to provide details like their name, Social Security number, filing status, and the number of allowances they were claiming.
The key point was that the more allowances claimed, the less tax was deducted from each paycheck. Each allowance was tied to specific criteria, such as being single, married, having children, or claiming other dependents.
How allowances impacted paycheck withholding
When employers processed W-4 forms, they used the number of allowances claimed to calculate how much tax to withhold from each employee’s paycheck. Employees who claimed more allowances saw less tax withheld, meaning they would take home more pay but might owe more tax when filing their annual returns. Conversely, employees who claimed fewer allowances would have more tax withheld, potentially leading to a tax refund at the end of the year.
It was crucial for employees to strike a balance between claiming too many or too few allowances. Claiming too few meant more tax withheld but resulted in overpaying taxes throughout the year. Claiming too many could leave employees under-withheld and facing a large tax bill come April.
Changes to withholding post-2017
The impact of the tax cuts and jobs act
The TCJA dramatically altered tax regulations, eliminating personal exemptions from 2018 to 2025. As a result, the W-4 form was redesigned, and withholding allowances were removed. Instead of allowances, the new W-4 focuses on filing status, income from other sources, deductions, and tax credits like the Child Tax Credit. This new system allows the IRS to calculate withholding more accurately, aligning paycheck deductions with the taxpayer’s final liability.
How the new W-4 works
The redesigned W-4 no longer asks for the number of allowances. Instead, it requires the following information:
- Filing status: Single, married filing jointly, or head of household
- Additional income sources: If you or your spouse has multiple jobs or other income streams like investments or retirement accounts
- Deductions: Taxpayers who itemize deductions may enter an estimated amount to adjust their withholding
- Tax credits: Individuals can claim credits, such as the Child Tax Credit, which reduces withholding
The new W-4 also offers employees the option to request an additional dollar amount be withheld from their paycheck if they believe their withholding needs to be adjusted further.
Pros and cons of the new withholding system
Exemptions from withholding
Although withholding allowances are no longer used, employees can still request to be exempt from withholding altogether if they meet specific criteria. To qualify, an employee must have had no tax liability in the previous year and expect to have none in the current year. Those who are exempt from withholding must file a new W-4 every year, writing “Exempt” on the form.
Being exempt from withholding can be beneficial for individuals whose income is low enough that they do not owe federal income tax. However, it’s important to reassess exemption status annually to avoid potential tax penalties if circumstances change.
How to avoid under-withholding
One of the risks of claiming too many allowances in the past, or underestimating withholding in the current system, is under-withholding. If you don’t have enough money withheld from your paycheck throughout the year, you could owe taxes when you file your return. In some cases, you might even face a penalty for underpaying your taxes.
To avoid this, taxpayers should use the IRS Withholding Calculator to check if their current withholding matches their tax liability. Adjustments can be made by filing a new W-4 with your employer and either increasing the amount withheld or reducing it to align more closely with your tax obligation.
When to submit a new W-4
It’s essential to update your W-4 form when your personal or financial situation changes. Common reasons for submitting a new W-4 include:
- Marriage or divorce
- The birth or adoption of a child
- A change in your spouse’s employment status
- Significant income changes, such as receiving a raise, bonus, or side income from investments
By updating your W-4 promptly, you ensure that your withholding reflects your most current financial situation. Failure to update your W-4 could result in under-withholding and a surprise tax bill at the end of the year.
Conclusion
Withholding allowances were once an essential tool for managing how much tax was withheld from paychecks. However, the introduction of the TCJA in 2017 eliminated allowances, replacing them with a simpler and more accurate W-4 form that aligns better with taxpayers’ financial situations. While allowances may return in 2025, it is crucial to understand the current withholding system, use the IRS calculator, and update your W-4 whenever your financial circumstances change.
Frequently asked questions
What happens if I don’t file a new W-4 after a life change?
If you don’t file a new W-4 after a significant life change, such as getting married, having a child, or changing jobs, your tax withholding might not accurately reflect your new financial situation. This could lead to either over-withholding, where too much tax is taken from your paycheck and you receive a refund, or under-withholding, where you may owe taxes and possibly face a penalty when you file your return.
Can I adjust my withholding even after submitting a W-4?
Yes, you can adjust your withholding at any time by submitting a new W-4 to your employer. It’s important to review your withholding periodically, especially if your income or financial situation changes during the year, to ensure that the correct amount of tax is being withheld.
Do I need to fill out a new W-4 every year?
You do not need to fill out a new W-4 every year unless your personal or financial situation changes. However, it’s a good idea to review your withholding annually or whenever you experience significant life events, such as marriage, the birth of a child, or starting a second job.
What is the penalty for under-withholding?
If too little tax is withheld from your paycheck and you owe a large amount when you file your return, you may face a penalty for underpayment. The IRS expects taxpayers to pay most of their tax liability throughout the year. To avoid penalties, make sure your withholding is accurate, especially if you have multiple jobs or other sources of income.
What should I do if I received a large tax refund last year?
If you received a large tax refund, it means too much tax was withheld from your paycheck. To avoid this in the future, you can submit a new W-4 to your employer and adjust your withholding allowances or request that less tax be withheld. Using the IRS Withholding Calculator can help you determine the right amount to withhold based on your income and deductions.
How do I withhold taxes on side income or gig work?
If you earn additional income from side jobs, freelance work, or gig employment, you may need to adjust your W-4 to have extra tax withheld from your paycheck. Alternatively, you can make estimated tax payments to the IRS each quarter. It’s crucial to account for all sources of income to avoid a large tax bill at the end of the year.
Key takeaways
- Withholding allowances are no longer relevant due to the TCJA of 2017.
- The new W-4 form focuses on filing status, deductions, and tax credits.
- Employees should update their W-4 when personal or financial circumstances change.
- Using the IRS Withholding Calculator can help ensure proper withholding.
- Failing to update withholding can result in a surprise tax bill or penalties.
Table of Contents