One of the most common questions small business owners ask is how much they should set aside for taxes. The answer depends on your business structure, your net income, and how well you manage deductions throughout the year. Guessing usually leads to underpayment penalties or unnecessary over-saving that restricts cash flow.
Most small businesses should plan to save between 25% and 35% of their net income for taxes. Net income means revenue after deductible business expenses, not total sales. This percentage typically covers federal income tax, self-employment tax if applicable, and state income tax.
Understanding how that percentage applies to your situation requires looking at structure and income level.
Why Small Business Owners Must Set Taxes Aside Separately
Unlike employees who receive W-2 wages with taxes withheld automatically, small business owners are responsible for calculating and paying their own taxes. If you operate as a sole proprietor or single-member LLC, you pay income tax plus self-employment tax on net earnings.
This is why separating tax savings from operating funds is critical. Using proper small business accounting systems helps ensure revenue, expenses, and tax allocations are tracked clearly throughout the year.
Poor recordkeeping not only affects tax planning, but can also increase audit exposure. Many common IRS problems stem from inconsistent documentation and aggressive deductions that are not properly supported.
How Much Should a Sole Proprietor Set Aside?
Sole proprietors typically face the highest effective tax bill because they pay both income tax and self-employment tax. Self-employment tax alone equals 15.3% of net earnings. Federal income tax is added on top of that, and Illinois state income tax may apply as well.
For most sole proprietors earning steady profits, setting aside around 30% of net income is a practical baseline. Higher-income earners may need to move closer to 35% depending on their tax bracket.
Because estimated small business taxes are paid quarterly, it is important to review projected income regularly. Missing quarterly deadlines can trigger penalties, which are explained further in our guide to key tax deadlines.
How Much Should an LLC Save for Taxes?
The answer depends on how the LLC is taxed.
If your LLC is taxed as a sole proprietorship, you will generally follow the same 30% to 35% guideline described above. If your LLC elects S corporation status, the calculation changes.
S corporations allow owners to pay themselves a salary that is subject to payroll taxes, while remaining profits may be distributed without self-employment tax. This structure can create meaningful tax savings, but it requires careful compliance and proper payroll setup.
Choosing or changing entity structure should not be done casually. It affects payroll reporting, deductions, and long-term planning. If you are evaluating structure changes, reviewing common work expense tax deductions and overall tax strategy together provides a clearer picture of total impact.
Revenue Is Not the Number You Use
A common mistake is setting aside a percentage of total revenue instead of net profit. Taxes are based on taxable income, not gross receipts.
For example, if a business generates $120,000 in revenue but has $40,000 in deductible expenses, taxable income is $80,000. If the owner sets aside 30% of net income, that equals $24,000 annually, or $6,000 per quarter.
Understanding deductible expenses is essential to making this calculation accurate. Many business owners overlook legitimate savings opportunities, which is why reviewing small business tax deductions regularly can significantly affect how much needs to be set aside.
What Happens If You Do Not Save Enough?
Underestimating tax liability can create cash flow problems and penalties. If quarterly estimated tax payments are too low, the IRS may assess underpayment penalties even if the balance is paid later.
Improper classification of workers can also increase tax exposure. Business owners who are unsure about the difference between employees and contractors should understand the distinctions outlined in W-2 and 1099 tax forms to avoid reporting mistakes.
If tax deductions or payments are ever questioned, having experienced guidance during an IRS review or examination can make a meaningful difference in outcome.
A Practical Percentage Formula
While exact calculations vary, many small business owners use a simple formula as a starting point. Estimate annual net income, multiply it by 30%, and divide by four for quarterly payments.
This approach creates a conservative cushion that accounts for federal income tax, self-employment income tax obligations, and state tax exposure. The percentage can be adjusted if income increases significantly or if tax planning strategies reduce taxable income.
Retirement contributions, entity elections, and deductible expenses all influence final numbers. Adjusting your set-aside percentage should be part of ongoing tax planning rather than a once-a-year guess.
Businesses in Chicago and Nearby Suburbs
Federal tax rules apply nationwide, including businesses operating in Chicago and nearby suburbs such as Lisle. Illinois has a flat state income tax, which must be factored into total planning. Local compliance requirements also affect payroll, estimated payments, and reporting.
Business owners in the Chicago area often benefit from localized guidance that accounts for both federal and Illinois considerations.
Frequently Asked Questions
How much should I set aside for taxes as a self-employed business owner?
Most self-employed business owners should set aside between 25% and 35% of net income. A common starting point is 30%, which helps cover federal income tax, self-employment tax, and state income tax. The exact percentage depends on income level, deductions, and filing status.
How do quarterly estimated taxes affect how much I need to save?
Quarterly estimated taxes require business owners to pay taxes four times per year instead of once annually. If you underpay, penalties may apply. Setting aside a consistent percentage of net income throughout the year makes quarterly payments easier and reduces the risk of surprises.
If you are unsure about payment timing, reviewing key tax deadlines can help you stay compliant.
Should I set aside taxes from revenue or profit?
You should set aside taxes based on net profit, not gross revenue. Net profit is calculated after deducting legitimate business expenses. Taxes are based on taxable income, not total sales.
Understanding allowable deductions directly affects how much needs to be saved.
Do LLC owners need to set aside the same percentage as sole proprietors?
Single-member LLCs taxed as sole proprietors usually follow the same 30% to 35% guideline. However, LLCs that elect S corporation status may reduce self-employment tax exposure through salary and distribution planning. The correct percentage depends on how the LLC is taxed.
What happens if I do not save enough for taxes?
If you do not set aside enough, you may face underpayment penalties, interest, and cash flow strain when payments are due. In more serious cases, the IRS may initiate collection actions. Maintaining accurate bookkeeping and reviewing income regularly reduces this risk.
If you are facing IRS notices, professional representation can help resolve the issue.
How can I make saving for taxes easier?
Many business owners open a separate tax savings account and transfer a fixed percentage of each deposit. Automating this process improves consistency and prevents spending money that should be reserved for taxes. Reviewing income monthly allows adjustments if revenue changes significantly.
Does this guidance apply to businesses in Chicago and nearby suburbs like Lisle?
Yes. Federal tax rules apply nationwide, including businesses operating in Chicago and nearby suburbs such as Lisle. Illinois state income tax must also be factored into total planning. Local guidance ensures both federal and state obligations are aligned.
Final Thoughts
So how much should a small business save for taxes?
For most owners, 30% of net income is a realistic starting point. Some may fall closer to 25%, while higher-income businesses may require 35% or more. The exact number depends on structure, deductions, and overall income.
The key is consistency. Separating funds monthly, reviewing projections quarterly, and maintaining accurate bookkeeping prevent surprises.
If you want a precise estimate tailored to your structure and income level, working with an experienced accounting and CPA firm can provide clarity and long-term tax savings.
