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Running a profitable business doesn't always mean the money in your bank account is available to spend. One of the most important financial responsibilities business owners face is setting aside enough money to cover their tax obligations.
Unlike traditional employees, who generally have income taxes withheld from their paychecks, many self-employed individuals and small business owners must calculate and reserve money for taxes themselves.
So, how much should a small business owner set aside for taxes?
You've probably heard recommendations to save 25% or 30% of your business income. While these percentages can provide a starting point, they don't account for differences in business profitability, tax classification, personal income, or available deductions.
The amount your business actually needs to reserve depends on several factors, and setting aside too little can create significant financial stress when tax payments become due.
At LeBeau & Associates, CPAs, we help business owners understand their tax obligations, anticipate future liabilities, and develop proactive financial strategies that support both tax compliance and business growth.
Many small business owners use 25% to 30% of net business profit as an initial tax savings guideline.
However, this is only a rough planning estimate, not a universal rule or an IRS requirement.
Some business owners may need to reserve significantly more, particularly when their income places them in higher federal tax brackets or they have substantial state income tax obligations.
Others may have lower effective tax rates because of deductions, credits, other household circumstances, or how their business income is taxed.
Your actual tax liability may depend on:
For example, a sole proprietor earning $70,000 in annual net profit may have a different tax liability than an S corporation shareholder receiving $90,000 in wages and additional pass-through income.
Even when two businesses generate similar profits, their owners may need different tax reserves.
The most reliable approach is to calculate an estimated annual tax liability and establish a savings plan based on that projection.
One of the most common mistakes business owners make is calculating their tax savings using gross revenue instead of net profit.
Understanding the difference can help you avoid unnecessarily restricting your business's cash flow.
Gross revenue is the total amount your business earns before expenses.
Net profit is the amount remaining after subtracting deductible business expenses, subject to applicable tax accounting rules.
For example, suppose your business generates:
For a sole proprietor, federal income tax and self-employment tax calculations generally begin with net business earnings, not the full $200,000 in revenue.
If you applied a 30% savings guideline to gross revenue, you would reserve $60,000.
Applying that same guideline to net profit would produce a reserve of $24,000.
Neither figure is automatically the correct amount of tax owed, but the difference illustrates why accurate financial records matter.
Your bookkeeping profit and taxable income aren't always identical.
Depreciation, nondeductible expenses, accounting adjustments, tax credits, and other provisions may affect the final calculation.
Business owners should also remember that personal income, filing status, and other factors can influence their total income tax liability.
This is why tax planning should involve more than simply multiplying revenue by a fixed percentage.
For business owners who want greater financial clarity, our Business Advisory Services can help connect financial reporting with proactive tax and cash flow planning.
Before determining how much to save, it's important to understand which taxes may apply to your business.
Different business structures create different tax obligations, and some owners must account for multiple types of taxes.
Federal income tax generally applies to taxable income, which may include business profits and other sources of personal income.
For owners of pass-through businesses, such as sole proprietorships, partnerships, and S corporations, taxable business income generally flows through to the owners' individual income tax returns.
The amount owed depends on taxable income, applicable tax rates, deductions, credits, and filing status.
Because federal income tax rates are progressive, earning more income does not mean all of your income is taxed at your highest marginal rate.
Self-employment tax generally applies to qualifying net earnings from self-employment.
For many sole proprietors and partners, this includes Social Security and Medicare taxes.
The combined standard self-employment tax rate is generally 15.3%, consisting of:
Self-employment tax is generally calculated on 92.35% of qualifying net earnings, rather than simply applying 15.3% to total business revenue.
The calculation may also be affected by other wages and applicable tax rules.
Importantly, self-employment tax is generally separate from federal income tax.
This is one reason self-employed individuals may need to reserve a larger portion of their profits than they initially expect.
Depending on where you live and operate your business, you may also owe state income taxes.
State tax obligations vary considerably.
Some states do not impose an individual income tax, while others have additional income tax requirements.
Businesses operating across multiple states may face more complicated filing and allocation rules.
Businesses with employees must account for payroll-related obligations, including applicable employer taxes and amounts withheld from employee wages.
These obligations should be tracked separately from an owner's personal income tax reserve.
For S corporation shareholder-employees, W-2 compensation generally involves payroll tax withholding and employer employment tax responsibilities.
Our article How to Pay Yourself as a Business Owner: Salary, Owner's Draw, or Distributions? explains how compensation methods affect tax treatment and financial planning.
Depending on your business activities and location, you may also need to collect or pay sales taxes, excise taxes, franchise taxes, or other state and local business taxes.
Sales taxes collected from customers should generally be treated as amounts owed to the appropriate taxing authority, not as available business income.
These obligations require separate planning and should not be confused with income taxes on business profits.
Rather than relying exclusively on a generic percentage, business owners can create a more accurate tax savings plan using a straightforward process.
Start by reviewing your year-to-date financial statements.
Calculate your business's revenue and deductible expenses, then estimate your remaining income and expenses through the end of the year.
If your business has seasonal revenue fluctuations, account for those changes rather than assuming every month will be equally profitable.
For example, a business with $60,000 in net profit through September might project $80,000 in annual profit if its remaining months are expected to perform similarly.
However, if the fourth quarter is typically the busiest period, the actual projection may be substantially higher.
Next, determine which taxes apply to your business income.
For a sole proprietor, this may include federal income tax, self-employment tax, and applicable state income tax.
For an S corporation shareholder, the calculation may involve W-2 withholding, pass-through income, shareholder basis considerations, and other factors.
Partnership owners may need to account for allocated income, guaranteed payments, and applicable self-employment tax treatment.
Your business structure plays a significant role in this calculation.
Use your projected income, deductions, filing status, and other relevant financial information to estimate your annual taxes.
This should account for income outside the business when applicable.
For example, a business owner whose spouse earns W-2 wages may have a different overall tax situation than a single business owner whose only income comes from self-employment.
The goal is to estimate the total tax liability attributable to your financial circumstances rather than assuming every business owner owes the same percentage.
Once you estimate your annual liability, subtract applicable estimated tax payments and withholding already paid toward that obligation.
Suppose your projected total tax liability is $26,000.
If you've already paid $14,000 through estimated payments and withholding, your projected remaining liability would be $12,000.
This simplified calculation does not account for every possible credit, payment, or tax adjustment, but it demonstrates the basic approach.
After estimating your remaining tax obligations, determine how much money you need to reserve from future business income.
For example, if you expect to owe another $12,000 and have six months to build the reserve, you would need to set aside approximately $2,000 per month.
If your income fluctuates, reserving a calculated percentage of profit as it is earned may be more practical than transferring a fixed dollar amount.
Remember that the timing of estimated tax payments matters. A savings plan must provide sufficient funds before applicable payment deadlines, not simply by the annual tax filing date.
Consider a simplified example involving a self-employed consultant.
The business generates approximately $15,000 in monthly revenue and incurs $7,000 in deductible monthly expenses.
That leaves an estimated monthly net profit of $8,000.
Over 12 months, the business would generate approximately $96,000 in annual net profit.
If the owner uses a preliminary tax reserve assumption of 30% of net profit:
This does not mean the owner will necessarily owe $28,800 in taxes.
The actual liability may be higher or lower depending on filing status, other income, tax deductions, state obligations, and applicable tax rules.
However, a consistent reserve can reduce the likelihood of spending money that may eventually be needed for taxes.
A percentage-based savings approach is often useful as a temporary budgeting tool.
But as a business grows, a more detailed tax projection can help prevent both under-saving and unnecessarily large cash reserves.
For example, a business owner who consistently reserves substantially more than necessary may be limiting funds available for hiring, equipment, debt reduction, or business expansion.
On the other hand, reserving too little may lead to financial stress, borrowing, or difficulty making required tax payments.
Our article How Business Owners Can Use Tax Projections to Make Better Financial Decisions explains how proactive forecasting can support smarter financial decisions.
For many small business owners, maintaining a dedicated tax savings account can make tax planning easier.
Rather than keeping all business funds in one operating account, you can regularly transfer money into a separate account designated for future tax payments.
Clearer cash flow visibility: Separating tax reserves helps distinguish money available for business operations from funds earmarked for taxes.
More consistent savings habits: Regular transfers can make tax preparation a routine financial responsibility rather than an occasional concern.
Reduced risk of accidental spending: Money reserved for taxes is less likely to be mistaken for available operating cash.
Easier payment preparation: When estimated tax deadlines approach, the necessary funds may already be available.
A dedicated account does not change how your business income is taxed, and it is not a substitute for accurate tax calculations.
It is simply a practical financial management tool.
The ideal transfer schedule depends on your business's cash flow.
Some owners transfer a portion of profits every week, while others make transfers after monthly bookkeeping is complete.
Businesses with irregular income may prefer to reserve funds whenever significant customer payments are received, using an approach that accounts for expected expenses.
Whatever schedule you choose, consistency is important.
Failing to reserve sufficient funds can create more than an inconvenient tax bill.
Depending on your circumstances, insufficient tax payments may result in underpayment penalties, interest, or financial pressure when payments become due.
A business that experiences significant growth may owe more taxes than its owner anticipated.
This can be particularly challenging when business income has already been used for operating expenses, personal withdrawals, or expansion.
Many business owners must pay taxes throughout the year rather than waiting until their annual return is filed.
The IRS generally uses a pay-as-you-go system, meaning taxpayers may need to make estimated payments when sufficient taxes are not withheld.
For many individual taxpayers, avoiding federal estimated tax underpayment penalties generally involves meeting applicable safe harbor requirements, such as paying at least 90% of the current year's tax or 100% of the prior year's tax, with a 110% prior-year threshold applying to certain higher-income taxpayers.
Additional conditions and exceptions apply.
Even when a taxpayer qualifies for a safe harbor, a remaining balance may still be due when the return is filed.
When tax payments are larger than expected, owners may be forced to use funds intended for payroll, vendor payments, or other operating expenses.
This can affect the financial stability of an otherwise profitable business.
Planning ahead reduces the likelihood that tax obligations will interfere with normal operations.
For more information about payment requirements, read Estimated Tax Payments: How to Avoid Penalties and Cash Flow Surprises.
A tax reserve should not be treated as a number you calculate once and forget.
Business income, expenses, and tax obligations can change significantly throughout the year.
Reviewing your estimated tax liability at least quarterly can help you identify changes before they become costly surprises.
If your business experiences rapid growth, your previous tax reserve assumptions may no longer be sufficient.
A business that expected $75,000 in annual profit but is now on track to earn $150,000 should reassess its projected taxes.
Significant equipment purchases, hiring decisions, and other qualifying expenditures may affect your taxable income.
However, not every cash expense is immediately deductible, and some costs must be capitalized or depreciated.
A tax projection can help clarify the actual effect.
Electing S corporation taxation, adding partners, or restructuring your business may change how income and compensation are reported.
These changes should trigger a review of your tax savings approach.
Marriage, changes in household income, retirement contributions, and other personal financial events may affect your overall income tax liability.
Because many small business owners report business income on individual returns, personal and business tax planning often need to be coordinated.
Setting aside enough money for taxes is essential, but effective tax planning goes beyond saving a percentage of profits.
A proactive strategy considers how your business earns income, which deductions and credits may apply, how your company is structured, and how financial decisions affect future tax obligations.
Strategic tax planning may help business owners:
For example, an owner considering a major business investment may benefit from understanding its tax consequences before making the purchase.
Likewise, a business experiencing rapid growth may need to adjust estimated tax payments or reconsider its broader financial strategy.
These decisions are more effective when made throughout the year rather than after the tax year has ended.
At LeBeau & Associates, our strategic tax planning approach focuses on helping business owners make informed decisions before tax obligations become unavoidable.
So, how much should you set aside for small business taxes?
For some owners, reserving 25% to 30% of net profit may provide a reasonable preliminary starting point. For others, that amount may be insufficient or unnecessarily high.
The appropriate amount depends on your business structure, profitability, income sources, deductions, and overall tax situation.
Rather than relying on a universal percentage, the most effective approach is to understand your projected tax liability and build a consistent savings strategy around it.
With accurate financial records, regular tax projections, and proactive planning, business owners can prepare for tax obligations while maintaining the cash flow needed to operate and grow their businesses.
LeBeau & Associates, CPAs helps business owners move beyond reactive tax preparation with strategic tax planning and business advisory services designed to support informed financial decisions.
Schedule a Strategic Tax Planning Consultation to discuss how a more proactive approach can help you prepare for your business's tax obligations.
This article is for general educational purposes and does not constitute individualized tax or financial advice. Tax obligations vary based on business structure, income, location, and individual circumstances. Consult a qualified tax professional to determine the appropriate tax reserve for your situation.
