When you work for yourself, nobody withholds taxes from your pay. The IRS still expects to get paid throughout the year, not in one lump sum in April. That is where estimated taxes come in. You calculate what you expect to owe and send payments four times a year: April 15, June 15, September 15, and January 15 of the following year.

There are two common ways to figure out how much to pay each quarter. The first is the safe harbor method, which is based on what you owed last year. If your adjusted gross income was $150,000 or less, paying 100% of last year’s total tax liability spread across four equal payments keeps you penalty-free regardless of what you actually owe this year. If your income was above $150,000, that threshold bumps to 110%. This method works well when your income is relatively stable year over year. You know the number, divide by four, and pay it.

The second method is paying 90% of your current year liability as you go. This requires projecting your income, which is harder for creative services businesses because project work tends to be lumpy. You might land a big client in Q2 and have a slow Q4. If you underestimate, you could face underpayment penalties. If your income varies a lot from year to year, the safe harbor method is usually simpler and safer.

For the practical side of actually having the money when payments are due, most freelancers and small agency owners set aside roughly 25% to 30% of their net income as they earn it. Net income means after business expenses, not gross revenue. Open a separate savings account and transfer that percentage every time you get paid or at minimum every month. Treat it like money that is already gone. When the quarterly due date arrives, the cash is sitting there waiting.

Both federal and Wisconsin state estimated taxes need to be paid. Federal payments go through IRS Direct Pay or EFTPS. Wisconsin payments go through the Department of Revenue’s website. The due dates align, so you can handle both on the same day.

Where freelancers get into trouble is not tracking their income and expenses accurately enough to know what their net actually is. If you are guessing at profitability, you are guessing at your tax obligation. Clean monthly books give you a real number to work with instead of a rough estimate that might be way off. Working with Rock Steady Bookkeeping in Beaver Dam means your numbers are current and reliable, so your quarterly payments are based on reality rather than hope.

One more thing worth noting. If you are brand new to freelancing and had no tax liability last year, you will need to use the current year projection method for your first year. Track income and expenses carefully from day one so you are not scrambling to figure out what you owe when that first quarterly deadline hits.