Understanding Estimated Taxes

For many people, taxes are something that get settled once a year in April. But the U.S. tax system does not work that way. The IRS operates under a “pay-as-you-go” system, which means taxes are generally expected to be paid throughout the year as income is earned.

For individuals who receive a regular paycheck, this happens automatically through withholding. But for many investors, retirees, and self-employed individuals, income often comes from sources that do not automatically withhold taxes, such as dividends, capital gains, business income, or retirement account withdrawals. In those situations, estimated tax payments may be required.

Estimated Tax Payment Deadlines

Estimated tax payments are typically due:

• April 15
• June 15
• September 15
• January 15 (of the following year)

Depending on where a taxpayer lives, state income taxes may follow a similar system, meaning estimated payments may also need to be made to the state throughout the year.

Why Estimated Tax Payments Matter

Failing to make these payments, or paying too little during the year, can lead to estimated tax penalties. These operate more like interest the IRS charges when taxes are paid later than expected rather than a true punitive fine. Even so, most taxpayers understandably prefer to avoid paying the government anything beyond what they owe.

The Challenge of Irregular Income

One of the biggest challenges with estimated taxes is that income is not always predictable. Investment income can fluctuate throughout the year. Dividends may increase or decrease, capital gains may be realized unexpectedly, and business income can vary widely from quarter to quarter.

Understanding the Safe Harbor Rules

To make estimated taxes more manageable, the IRS allows taxpayers to rely on “safe harbor” rules that help avoid penalties. In general, penalties can be avoided if a taxpayer pays throughout the year at least 90% of the current year’s total tax liability, or 100% of the prior year’s tax liability (110% for higher-income households with prior year adjusted gross income above $150,000).

Many people use the prior-year method because it is straightforward. If last year’s tax bill was $20,000, for example, paying $5,000 each quarter will generally satisfy the safe harbor requirement. This approach simplifies planning, although it can still result in a balance due when filing if income increases significantly during the year.

How Tax Withholding Can Help Meet Estimated Taxes

Another often overlooked feature of the tax system involves how the IRS treats tax withholdings. Taxes withheld from income sources such as wages, pensions, Social Security, or retirement account distributions are treated as though they were paid evenly throughout the year.

This rule can provide flexibility for many retirees and investors. For example, a distribution from an IRA can include a withholding amount that helps satisfy a portion of the year’s tax obligation. Even if that withholding occurs late in the year, the IRS generally treats it as if it had been paid gradually throughout the year. For individuals who already plan to take retirement account distributions, this can simplify the process of meeting estimated tax obligations.

Planning Ahead for Cash Flow

Another important detail many taxpayers overlook is timing. The first estimated tax payment for the new tax year is due on April 15, which is the same date that the prior year’s full tax liability must be paid when filing a return. That can create a significant cash flow demand if estimated payments have not been planned for in advance.

For this reason, it is important to review estimated tax requirements with an accountant to ensure payments are calculated appropriately and scheduled on time. It is also helpful to understand from where those payments will be initiated. If estimated taxes are funded from investment accounts, planning allows sufficient time to raise cash in a thoughtful way rather than being forced to sell investments at an inopportune moment.

How Estimated Taxes Fit Into a Financial Plan

We work with our clients and their tax professionals to help ensure estimated tax payments are incorporated into the broader financial plan. By planning and maintaining a clear payment schedule, it becomes easier to meet estimated tax obligations, manage liquidity from the portfolio, and avoid unnecessary penalties or surprises at tax time.

For informational and educational purposes only. The information is not intended to provide specific advice or recommendations, and the information has been obtained from sources believed to be reliable. 

Carnegie Investment Counsel (“Carnegie”) is a registered investment adviser with the Securities and Exchange Commission. Registration as an investment adviser does not imply a certain level of skill or training. For a more detailed discussion about Carnegie’s investment advisory services and fees, please view our Form ADV and Form CRS by visiting: https://adviserinfo.sec.gov/firm/summary/150488.

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