NEW CLIENTS! Get in Touch Today for a FREE Business Assessment!

Learning Center
We keep you up to date on the latest tax changes and news in the industry.

Estimated Tax Payments: Not Just for the Self-Employed in Montana

In our Billings office, we often talk about the “three-legged stool” of business stability: accurate bookkeeping, optimized taxes, and timely payroll. For many Montana professionals, especially those in real estate or local sub-contracting, maintaining that tax leg requires a clear understanding of estimated payments. While W-2 employees have their Social Security, Medicare, and income taxes automatically peeled off every paycheck, those running their own show must take a proactive approach.

The Prepayment Requirement Explained

Self-employed individuals are required to prepay their taxes through periodic installments. These are called “estimated” payments because they are based on your projected net earnings for the year. Following the IRS schedule is essential; failing to stay current can lead to frustrating interest penalties that eat into your hard-earned margins.

However, these requirements extend far beyond those with a 1099-NEC. If you are a high-earning professional or a business owner in the $100K to $500K range, you likely have diverse income streams. Anyone who receives income where no tax is withheld—or where withholding is insufficient—should be looking at estimated payments. This includes income from stock and property sales, investment dividends, taxable alimony, or K-1 distributions from partnerships and S-corporations. Furthermore, if you are subject to the 3.8% net investment income tax or employ household help, you are likely on the hook for these installments.

Image 1

The 2026 Estimated Tax Schedule

A common misconception is that these payments are strictly “quarterly.” In reality, the IRS periods are slightly irregular. To keep your books accurate and your cash flow steady, mark these 2026 deadlines on your calendar.

2026 ESTIMATED TAX INSTALLMENTS DUE DATES

Quarter

Period Covered

Months

Due Date

First

January through March

3

April 15, 2026

Second

April and May

2

June 15, 2026

Third

June through August

3

September 15, 2026

Fourth

September through December

4

January 15, 2027

Speak To An Expert
Speak to an expert today on how we can help your business
Get Started

Image 2

Navigating Penalties and Safe Harbors

The IRS provides a “de minimis” exception: if your tax due after withholding and credits is less than $1,000, the underpayment penalty generally does not apply. If you exceed that amount, penalties are calculated per period. This means an overpayment in the spring can help you in the summer, but you cannot easily “make up” a missed spring payment by doubling up in September.

The Safe Harbor Method

For those who prefer a more straightforward path to compliance without constant recalculation, safe-harbor estimates are available. Generally, you can avoid penalties if your total payments equal at least:

  • 90% of your current year’s tax liability, or
  • 100% of your prior year’s tax liability.

Note that for high-income earners (those with an adjusted gross income over $150,000), the prior-year safe harbor increases to 110%. While some attempt to fix gaps by increasing withholding on secondary income sources, this is often imprecise. Our firm specializes in providing the practical, personal guidance needed to set up these payments accurately. If you need help stabilizing your business’s tax leg, please reach out to our Billings team for a consultation.

Beyond the standard IRS schedule, we frequently help local service providers evaluate if the “annualized income installment method” is a more effective strategy for their cash flow. This is particularly beneficial for Montana businesses that experience significant seasonal shifts, such as those in landscaping, construction, or seasonal tourism. Rather than paying four equal installments, this method allows you to tie your tax payments directly to your actual income during each period. This ensures you aren't paying high tax estimates during your slowest months, keeping your liquid capital available when you need it most.

Image 3

Managing these payments is about more than just avoiding penalties; it’s about financial peace of mind. For a real estate professional or a small business owner earning between $100,000 and $500,000, a sudden, large tax bill can disrupt operations and stall growth. By applying our values of simplicity and honesty to your tax planning, we help you treat these payments as a predictable part of your business cycle. Whether we are adjusting your withholding or calculating safe-harbor amounts, our goal is to ensure that the three legs of your business—books, taxes, and payroll—remain rock solid year-round. Taking these proactive steps allows you to focus on the relationships and quality work that define your business here in Billings and throughout the surrounding states.

Speak To An Expert
Speak to an expert today on how we can help your business
Get Started
Share this article...

Want tax & accounting tips and insights?

Sign up for our newsletter.

I confirm this is a service inquiry and not an advertising message or solicitation. By clicking “Submit”, I acknowledge and agree to the creation of an account and to the and .
Clarity Tax + Accounting Hello! How can we help?
Welcome to ClarityBot--your smart assistant for clarifying payroll, bookkeeping and tax!
Please fill out the form and our team will get back to you shortly The form was sent successfully