QUARTERLY TAX CALCULATOR
Estimated Quarterly Tax Calculator for Business Owners
Instantly estimate your federal quarterly tax payments and avoid penalties, surprises, and end-of-year stress.
Quarterly taxes don’t have to be stressful
Knowing your estimated quarterly taxes helps you plan ahead, protect cash flow, and make confident decisions across your business.
Avoid IRS penalties
Stay ahead of IRS underpayment rules by making accurate quarterly payments and preventing costly penalty fees.
Improve cash flow
Keep your monthly and quarterly cash flow stable by knowing exactly how much to set aside before payments are due.
Prepare for filing
Reduce year-end stress with cleaner records and predictable tax numbers, making annual filing faster and far less overwhelming.
Stay organized
Eliminate guesswork and manual calculations with a structured, reliable estimate that keeps your business and personal finances on track.
A clear picture of your quarterly taxes
A quarterly tax estimate shows you what you owe and when – so you can plan ahead and stay compliant as income changes.
With Acuity's quarterly tax calculator, you can:
Plan cash flow throughout the year
Avoid underpayment penalties
Stay compliant with confidence
Make better decisions as income fluctuates
A good quarterly tax plan helps you:
Avoid costly penalties
Stay compliant with IRS rules and prevent underpayment fees
Stay ahead of cash flow
Know what you’ll owe ahead of time and plan with confidence
Make smarter financial moves
Time hiring, spending, and growth decisions more effectively
Reduce year-end stress
Prepare months in advance with no surprises at tax time
Ready to get started?
Download our free estimated
quarterly tax calculator below.
Planning ahead is the fastest path to financial confidence.
How to calculate your quarterly taxes
How to use our estimated
quarterly tax calculator
Follow these four steps to calculate your quarterly tax estimates:
01
Income snapshot
First, have last year’s tax info handy. Plug in the appropriate values in the yellow fields
and the estimated quarterly tax payment calculator will give you an estimate of what you owe this year.
Plan cash flow throughout the year
Use prior income, deductions, and tax rate to create a reliable starting point.
Adjust for this year
Update estimates to reflect current income and changes — the calculator does the rest.
02
Federal payment plan
For federal taxes, enter your planned W-2 withholding(s) in the yellow field (and if you or your spouse has a W-2). This will auto-populate how much you need to pay in taxes each quarter.
To the right of the Federal Taxes Table, you’ll see a place to record what you’ve already paid, when you paid it, and any notes related to the payment such as from a specific account. While many things are automated in our business lives, anything we do personally is usually outside of those systems. This tool allows you to capture those items and communicate those to your tax advisor (and to future you).
See your quarterly amounts
Your estimated federal tax is automatically split into clear quarterly payments.
Track what’s been paid
Log payments, dates, and notes
so nothing falls through the cracks.
03
State taxes (simplified)
Do the same for your state taxes as you did for the federal portion, this time adjusting the tax rate for the appropriate state in which you do business.
The State Taxes Table has the same area to the right of it where you can record payments, track when those payments were made, and add any notes that you may need to keep track of regarding those payments.
*Keep in mind that this is a simplistic percentage and as such, does not take into account the deductions and credits available specific to certain states. For a customized and more precise measurement of quarterly state taxes, schedule time with a team member below.
Apply a simplified state rate
Use a quick percentage-based estimate to plan ahead for state obligations.
Keep federal and state separate
Track state payments independently while keeping everything organized.
04
Notes for your advisor
You’ll most likely have a few questions regarding your taxes as you use this calculator, make payments, and record notes. This section is for you to keep track of any questions that arise during the process so you can remember to ask them when you meet with an Acuity Tax Pro.
Stay advisor-ready
Capture questions and context as they come up — so every tax review is focused and productive.
What this quarterly tax calculator helps you estimate
This calculator gives you a fast, accurate, and IRS-aligned estimate of:
Your federal quarterly tax payment
Your self-employment tax obligation
Your taxable income after business expenses
Your potential underpayment risk
Whether you may qualify for Safe Harbor protection
How changes in income or expenses affect your tax burden
Who should use this quarterly tax calculator?
Quarterly taxes can be confusing. This tool is designed for anyone who needs clarity around what they owe throughout the year, including:
If you need to estimate your IRS quarterly payments, this tool is built for you.
Where estimated taxes
fit into your business finances
Quarterly taxes touch more parts of your business than you may think.
Understanding your estimated obligation helps you make stronger decisions in:
Ensures you set aside enough each month without disrupting operations.
Clarifies how draws, distributions, or salary affect tax obligations.
Keeps your accounts accurate and your projections reliable.
Helps you stay aligned with IRS rules and avoid penalties.
Need additional tax help? Acuity can help
you with your tax prep year-round.
Want file-ready forms? Talk with our team
To get the most accurate estimate, have ready:
To get the most accurate estimate, have ready:
FAQs: Estimated quarterly tax payments
Do I need to pay estimated quarterly taxes?
If you expect to owe $1,000+ when filing, yes. Most business owners, freelancers, and companies need to pay quarterly payments to avoid penalties. Use our free calculator to estimate your quarterly obligations.
Is this calculator accurate for self-employment tax?
This estimates your federal taxes including the 15.3% self-employment tax. Your actual liability varies by deductions and business structure. If you’re looking for a personalized quarterly tax plan, our tax experts are here to help.
What happens if I underpay on quarterly tax estimates?
You can face IRS penalties and interest charges if you underpay – and underpayment penalties can add up quickly. Our tax services ensure you pay the right amount at the right time – no surprises.
Do W-2 employees need to pay quarterly taxes?
W-2 employees generally don’t, but business owners do. If you run a company, have 1099 income, or side business revenue, quarterly payments are required. We’ll handle the calculations for you.
Do quarterly tax payments include state taxes?
No, this covers federal only. State quarterly taxes vary by location and business type. When you partner with Acuity, our tax experts calculate both federal and state obligations, so you’re fully covered year-round.