If you are a freelancer, consultant, or sole proprietor in Colorado Springs, your next estimated tax payment is coming up on Tuesday, September 15, 2026.
This payment generally covers income earned from June 1 through August 31. You may owe both a federal estimated payment to the IRS and a Colorado estimated payment to the state. Colorado Springs does not have a separate city income tax deadline, but local business owners still need to keep up with both federal and state requirements.
The good news? September 15 is not a reason to panic. Think of it as a checkpoint. It is a chance to look at what your business has earned so far, compare it with what you already paid, and make a better plan for the rest of the year.
Here are five things to review before the Q3 deadline.
1. Recalculate instead of automatically repeating your last payment
Many independent business owners simply pay the same amount every quarter. That can work if your income is steady, but freelance and consulting income rarely follows a perfectly predictable schedule.
Maybe spring was slow, but summer brought several large projects. Or perhaps you had a strong first half of the year and a quieter third quarter. Your estimated payments should reflect what is actually happening in your business: not just last quarter’s number.
The IRS allows taxpayers with uneven income to use an annualized income method. In plain English, this method looks at when you earned the income rather than pretending your income arrived evenly throughout the year.
The calculation is tied to Form 2210, Schedule AI, but you do not need to work through it alone. The general process is:
- Add up your business income and expenses so far this year.
- Estimate what your full-year income may look like.
- Compare your projected tax with the payments you have already made.
- Adjust your Q3 payment based on the results.
If your income was lower during this period, you may not need to send as much as you expected. If you had a particularly profitable quarter, you may need to set more aside now.
The important point is that a slower quarter does not automatically mean you are in trouble, and a strong quarter does not automatically mean you should guess at a dramatically higher payment. A quick review of your year-to-date numbers can give you a much more useful answer.
2. Know your safe harbor
A “safe harbor” is a payment target that can generally help you avoid an underpayment penalty, even if your final tax bill turns out to be higher than expected.
For federal taxes, your total payments for 2026: including withholding and estimated payments: typically need to reach one of these targets:
- 90% of your expected 2026 tax, or
- 100% of your 2025 total tax, or
- 110% of your 2025 total tax if your 2025 adjusted gross income was more than $150,000. The threshold is generally $75,000 for married taxpayers filing separately.
The IRS estimated tax guidance explains these rules in more detail.
These are annual targets. You do not necessarily need to pay the exact same amount every quarter, especially if your income changes during the year. However, making four reasonably timed payments is still important. Waiting until next April may leave you with a large balance and possible penalties.
If you do not have enough information to calculate an exact number, a reasonable payment is usually better than skipping Q3 completely. Just remember that the safe harbor calculation needs to account for your full-year total: not only the amount you send in September.
Colorado has its own estimated tax requirements. You can review the state’s individual estimated income tax payment information and 2026 DR 0104EP form for payment instructions.
3. Use September to look ahead to year-end
The best tax planning often happens before the year ends. By the time you file your return, many opportunities are already gone.
September is a good time to review retirement contributions, equipment needs, and your expected business income.
Retirement contributions
If you have a Solo 401(k) or SEP IRA, review how much you may be able to contribute for 2026. These plans can help you save for retirement while potentially lowering your taxable business income.
The rules and deadlines vary:
- Some Solo 401(k) employee contributions generally need to be made by the end of the calendar year.
- Employer contributions may have a later deadline tied to your tax return, including extensions.
- SEP IRA contributions generally have a deadline connected to your tax return, including extensions.
Do not wait until tax filing season to learn which deadline applies to you. If you do not have a retirement plan yet, ask whether one could make sense for your business and personal goals.
Equipment and business purchases
If your business needs a computer, camera, tools, furniture, or other equipment, review your plans before December. Depending on the item and the tax rules, the timing of the purchase and when you place it in service may affect your deduction.
But do not buy something only because someone says it is a “write-off.” Spending a dollar to save a portion of that dollar in taxes is not a good business decision by itself. The purchase should serve a real business purpose and fit your cash flow.
The QBI deduction
Many freelancers and pass-through business owners may qualify for the federal qualified business income deduction, often called the QBI deduction. It can be worth up to 20% of eligible business income, but income limits and business type can affect the result.
For 2026 planning, keep an eye on the taxable-income thresholds of approximately:
- $197,300 for single filers
- $394,600 for married couples filing jointly
Consultants and other professional service providers may face additional limits as income rises. That makes an early projection especially valuable.
Colorado also has an important change to watch. As explained in our earlier post, “The QBI Catch: Why Colorado Springs Business Owners Need to Watch Their 2026 State Returns”, Colorado is making its QBI deduction add-back permanent for certain higher-income taxpayers beginning in 2026.
The Colorado thresholds discussed in that post: generally $500,000 of adjusted gross income for single filers and $1 million for married couples filing jointly: are separate from the federal QBI thresholds. If your income is approaching either set of limits, your federal and Colorado estimates may need a closer look.
4. Start your paperwork before the rush
Tax paperwork is easier to handle when you collect it throughout the year rather than trying to reconstruct everything in January.
For payments made in 2026, the reporting threshold for Form 1099-NEC is generally $2,000 per payee. That means you should track payments to contractors and other nonemployee service providers throughout the year.
Now is a good time to:
- Request a completed Form W-9 from each contractor who may meet the reporting threshold.
- Keep an updated list of contractor names, addresses, taxpayer identification numbers, and total payments.
- Separate contractor payments from reimbursements and other types of expenses.
- Review whether payments made by credit card or certain payment platforms may be reported separately.
- Save invoices and proof of payment with your bookkeeping records.
You may not need to issue every form until January, but gathering the information now can prevent a stressful scramble later.
The IRS Publication 1099 provides additional information about reporting requirements. Because reporting rules can vary based on how a payment was made and what type of service was provided, ask for help if you are unsure.
5. Get a second set of eyes if the numbers feel unclear
Estimated taxes can be difficult when your income changes, your expenses are uneven, or your business is growing quickly. It is also easy to overlook the effect of retirement contributions, the QBI deduction, Colorado adjustments, or a new business purchase.
A short review can help answer practical questions such as:
- Am I on track with my federal and Colorado payments?
- Should I use the annualized income method?
- Is my current tax reserve large enough?
- Should I increase or reduce my Q3 payment?
- Are there year-end strategies worth considering?
- Could my business structure or retirement plan need another look?
At Beta Financial Accounting, we help Colorado Springs freelancers, sole proprietors, consultants, and small business owners move beyond last-minute tax preparation. Our Tax Optimization Session reviews your last two years of tax returns along with a current snapshot of your business. The goal is to identify missed opportunities and create an action plan you can use before the next deadline.
Your 30-minute Q3 check-in
Before September 15, block 30 minutes on your calendar and gather:
- Your current year-to-date income
- Business expenses paid so far
- Bank and credit card statements
- Federal and Colorado estimated payments already made
- Your 2025 tax return
- Any major purchases or retirement contributions planned for 2026
Then ask one simple question: Does my current payment plan still match the business I am running today?
If the answer is clear, make your Q3 payment on time and update your records. If the answer is “I’m not sure,” that is a good reason to schedule a conversation.
September 15 is a checkpoint: not a crisis. A little planning now can help you avoid a larger surprise next spring and make better decisions before the year is over.
Schedule a consultation with Beta Financial Accounting to get a second set of eyes on your Q3 estimated tax plan.
