Budgeting for Business Owners

Small business owners can deduct any ordinary and necessary expense of running the business, and the list is longer than most owners realize. An ordinary expense is one that is common in your trade. A necessary expense is one that is helpful and appropriate. If a cost clears both tests and you have a receipt, it is almost always deductible. The reason this matters so much is that every dollar of deduction lowers taxable income at your marginal rate, so a business owner in a 32 percent combined federal and New York bracket saves about 32 cents on every clean dollar of expense. That is real money that stays in the business.

The core categories repeat across almost every business. Rent, payroll and contractor pay, supplies, software subscriptions, professional fees, business insurance, advertising, bank and merchant fees, and the business portion of phone and internet all qualify. Vehicle costs are deductible by the business-use percentage or the standard mileage method. Meals with a clear business purpose are 50 percent deductible. Equipment and furniture can be written off immediately rather than depreciated, which we cover below. The IRS lays out the framework in its deducting business expenses guidance, and business owners should review it once a year as the business changes.

Worked example. A consulting LLC owner grosses 240,000 dollars and has 38,000 dollars of clean expenses across rent, software, a contractor, and travel. Those deductions drop taxable income to roughly 202,000 dollars. At a combined marginal rate near 35 percent for a New York City business owner, the 38,000 dollars of deductions is worth about 13,300 dollars in tax saved. Skip the recordkeeping and the same owner overpays by that amount, which is the cost of treating bookkeeping as an afterthought instead of a habit business owners build into the week.

We see this every year. A business owner runs personal and business spending through one account, then guesses at the split in April. The IRS disallows guesses. Business owners who keep a dedicated business account and card create a clean record automatically, and they capture deductions they would otherwise forget, like the annual software renewal or the conference registration buried in a personal statement. A separate account is the single best habit a new business owner can adopt.

The edge case is the startup and the mixed-use cost. Costs before the business opens are startup costs, and a business owner can deduct up to 5,000 dollars in year one with the rest amortized. Mixed-use items like a home office or a personal vehicle need a defensible business percentage, not a round guess. Get those allocations right and a business owner keeps the deduction under scrutiny. Get them sloppy and the whole category is at risk.

One more piece business owners underuse is the equipment deduction. Under Section 179 a business owner can expense up to 2,560,000 dollars of qualifying equipment in 2026, and 100 percent bonus depreciation lets a business owner write off the full cost of most new and used equipment the year it is placed in service. A business owner who buys a 60,000 dollar piece of machinery in December can deduct the whole 60,000 dollars that year rather than spreading it across seven, The same rule lets a business owner pull a planned next-year purchase into a strong current year to offset the spike, and it applies to vehicles over 6,000 pounds, computers, and most equipment a working business actually uses.

Our bookkeeping service builds the chart of accounts so deductions land where they belong. To find the write-offs your business is missing, start at our new client inquiry page.

Many profitable business owners save real money with an S corporation election, but it is not the right move for everyone, and electing too early can cost more than it saves. The S corp pitch is simple. As a sole proprietor or single-member LLC, every dollar of net profit is hit with 15.3 percent self-employment tax. An S corp splits your income into a reasonable salary, which carries payroll tax, and remaining profit distributions, which do not. That spread is where the savings live, and for the right business owner it is thousands a year.

The mechanics run through payroll. An S corp owner becomes an employee of their own company, runs a real W-2 paycheck with withholding, and takes the rest as distributions. The IRS requires that the salary be reasonable for the work performed, which it explains in its S corporation compensation guidance. Set the salary too low to dodge payroll tax and the IRS can reclassify distributions as wages with penalties. The election itself is made on Form 2553, and timing matters because the deadline falls early in the tax year.

Worked example. A business owner nets 160,000 dollars as a single-member LLC and pays roughly 22,000 dollars in self-employment tax. Convert to an S corp, pay a reasonable salary of 90,000 dollars, and take 70,000 dollars as distributions. Payroll tax now applies only to the 90,000 dollar salary, cutting the Social Security and Medicare hit by several thousand dollars, often 8,000 to 10,000 dollars net of the added payroll cost. That saving recurs every year the business owner stays profitable at this level, and over a decade it compounds into a number worth the modest extra compliance the election requires.

We see this every year. A business owner elects S corp status with 40,000 dollars of profit, where the payroll service fees, extra tax return, and reasonable-salary requirement eat the entire benefit. There is a break-even, generally somewhere north of 60,000 to 80,000 dollars of net profit depending on the business, below which an S corp costs a business owner money. The election is a tool, not a trophy, and a business owner should run the actual numbers before filing the form rather than copying what a friend did. The friend’s business may have twice the profit or a different state tax picture, and an S corp that prints money for one business owner can be dead weight for another with thinner margins.

The edge case is the business owner with wildly variable profit or plans to reinvest heavily. An S corp adds payroll compliance, a separate 1120-S return, and reasonable-comp risk every year, even in a down year. A business owner whose income swings hard or who is plowing profit back into growth may prefer the flexibility of staying an LLC until income stabilizes.

One detail business owners overlook is that the S corp also affects the QBI deduction and retirement contributions. The reasonable salary an S corp business owner pays reduces qualified business income but creates the W-2 wages that can preserve the QBI deduction at higher incomes, and the salary is also the base for Solo 401k contributions. These pieces interact, so a business owner should never set the S corp salary in isolation. It is a single number that ripples through payroll tax, the QBI deduction, and retirement savings all at once. Getting it right usually means modeling two or three salary levels and picking the one that minimizes total tax across all three effects rather than just the payroll line.

Our entity formation and structuring service models the S corp election against your real numbers. To see whether the election pays for your business, start at our new client inquiry page.

Business owners pay tax four times a year through estimated payments, because there is no employer withholding on business profit. The IRS operates on a pay-as-you-go system, so a business owner who waits until April owes the full year at once plus an underpayment penalty. The penalty is really interest charged at the federal rate, and it is entirely avoidable. Getting on a quarterly rhythm is one of the first habits a new business owner has to build, and it smooths cash flow across the year instead of creating one giant spring obligation.

The 2026 quarterly due dates are April 15, June 15, September 15, and January 15 of the following year. Each payment covers federal income tax plus self-employment tax for that portion of the year, and S corp owners cover the income tax on their distributions and the withholding on their salary. Business owners file Form 1040-ES to figure the payments, and the IRS walks through the system in its estimated taxes guidance. New York business owners owe state estimates on the same calendar, so a New York City business owner manages federal, state, and city tax in one schedule.

Worked example. A business owner expects 50,000 dollars of total federal and state tax for the year. Divided evenly, that is 12,500 dollars per quarter sent on each due date. A cleaner approach for many business owners is the set-aside, moving a fixed share of every deposit, often 28 to 32 percent of net profit, into a separate tax account so the quarterly payment is already funded. The business owner never scrambles, because the money was never in the spending account to begin with. Discipline here prevents the most common cash crisis a growing business hits. A separate tax account also keeps a business owner from mistaking the IRS’s money for working capital, which is the trap that sinks profitable businesses that simply ran out of cash at filing time.

We see this every year. A business owner has a breakout year, spends the cash on growth or salary, and gets blindsided by a tax bill the old withholding never prepared them for. The safe harbor rule is the cushion. Pay in at least 100 percent of last year’s tax, or 110 percent if your adjusted gross income topped 150,000 dollars, and the IRS will not penalize you even if the final bill is larger. For a business owner whose income is climbing, paying last year’s number quarterly buys time to fund the difference at filing.

The edge case is the seasonal or lumpy business. A business owner whose revenue spikes in the fourth quarter can use the annualized installment method to pay more when the money actually arrives and less in slow quarters, rather than four equal payments that overcharge early. It takes more bookkeeping but matches real cash flow.

A business owner should also remember that estimated payments are not just federal income and self-employment tax. A business owner with employees is separately responsible for payroll tax deposits, which run on their own deposit schedule and carry steep penalties for late payment. Keeping the personal estimated payments and the business payroll deposits straight is where a lot of growing business owners stumble, because the two systems have different deadlines and the IRS treats missed payroll deposits far more harshly than a missed estimate. The trust fund recovery penalty can even reach a business owner personally for unpaid withheld payroll taxes, which is one of the few business liabilities that pierces the corporate shield, so a business owner cannot afford to let payroll deposits slip.

Our tax compliance service sets each business owner’s quarterly schedule, federal through city. If estimated taxes feel like guesswork, set yours at our new client inquiry page.

The qualified business income deduction lets eligible business owners deduct up to 20 percent of net business income before income tax is figured, and it is one of the largest breaks pass-through business owners get. It comes from Section 199A and applies to income from sole proprietorships, partnerships, S corporations, and most LLCs. For a business owner with healthy profit, the 20 percent deduction is worth real money every year, and it costs nothing to claim beyond getting the return done correctly. Many business owners qualify and never see it appear on a rushed return.

The deduction is figured on Form 8995 or 8995-A depending on income, and it applies to qualified business income, which is generally your net profit excluding wages you pay yourself and investment income. The IRS details the rules in its qualified business income deduction guidance. Below the income thresholds, roughly 197,300 dollars single and 394,600 dollars married for the current brackets, almost every business owner gets the full 20 percent. Above those thresholds the deduction starts to phase and the wage and property limits kick in, which is where planning earns its keep for a business owner.

Worked example. A business owner files as a single-member LLC with 150,000 dollars of qualified business income, under the threshold. The QBI deduction is 20 percent of 150,000 dollars, or 30,000 dollars. The business owner now pays income tax on 120,000 dollars of business income instead of 150,000 dollars. At a 24 percent marginal rate that is about 7,200 dollars of federal tax saved. The deduction reduces income tax only, not self-employment tax, but for any profitable business owner it is a meaningful and recurring cut. Across a few years the QBI deduction can save a steady business owner more than the cost of professional tax help many times over, which is why it deserves attention on every return rather than an afterthought.

We see this every year. A business owner above the income threshold runs a specified service business, like consulting, law, or accounting, where the deduction phases out entirely at the top of the range. The interaction with the S corp salary matters here, because the salary a business owner pays reduces QBI but creates the wages that preserve the deduction above the threshold. That tension has to be modeled, not guessed, and a business owner who ignores it either overpays salary or loses the deduction.

The edge case is the high-income non-service business owner, like manufacturing or contracting, where the deduction above the threshold is limited to the greater of 50 percent of W-2 wages paid or 25 percent of wages plus 2.5 percent of property. A business owner near that line can sometimes preserve the full deduction by adjusting wages or capital.

Worth noting for any business owner is how the QBI deduction stacks with the standard deduction. The 20 percent QBI deduction comes off taxable income in addition to the standard deduction, which for 2026 is 16,100 dollars single and 32,200 dollars married, so a business owner does not have to itemize to claim it. That makes the QBI deduction available to nearly every profitable pass-through business owner regardless of how they file the rest of the return, and it is why skipping it is such a common and costly oversight on a hurried return. A business owner reviewing a prior-year return should look specifically for Form 8995 or 8995-A, and if it is missing, an amended return can often recover the deduction for any year still inside the three-year window.

Our tax strategy consulting models the QBI deduction against entity choice and compensation. To capture the full 20 percent your business is owed, start at our new client inquiry page.

Business owners have access to retirement plans that dwarf the standard IRA, and the contributions are deductible, so a retirement plan is one of the few moves that builds personal wealth and cuts the tax bill at the same time. The two workhorses for a business owner are the SEP IRA and the Solo 401k. Both let a business owner shelter far more than the 7,500 dollar IRA limit, and the right one depends on whether the business has employees and how much income the owner wants to defer in a given year.

A SEP IRA lets a business owner contribute up to 25 percent of compensation, capped at 70,000 dollars for 2026, with almost no administration. A Solo 401k, available to a business owner with no employees other than a spouse, allows an employee deferral of 24,500 dollars for 2026 plus an 8,000 dollar catch-up at age 50 or older, on top of an employer profit-sharing contribution, often reaching the same 70,000 dollar total but at lower income levels. The IRS compares the options in its retirement plans for self-employed people guidance, which every business owner should read before choosing.

Worked example. A business owner nets 120,000 dollars with no employees. A SEP allows roughly 22,300 dollars based on the 25 percent of net calculation. A Solo 401k allows the full 24,500 dollar deferral plus a profit-sharing piece, letting the same business owner shelter well over 40,000 dollars. At a combined marginal rate near 32 percent, that larger contribution saves around 13,000 dollars in tax while the money grows for retirement. The Solo 401k wins for a business owner who wants to sock away the most at a moderate income. The SEP wins for a business owner who values simplicity or files late, since a SEP can be opened and funded right up to the extended filing deadline, giving a business owner a rare second chance to shelter income after year end.

We see this every year. A business owner waits until April to think about retirement, only to learn the Solo 401k had to be established by December 31 of the tax year, even though contributions can be funded later. A business owner who misses that deadline loses a year of the larger plan and falls back to a SEP. Set the plan up before year end and a business owner keeps every option open, including the higher Solo 401k ceiling.

The edge case is the business owner with employees, where a SEP requires contributing the same percentage for staff, which can get expensive fast. A safe harbor 401k or a SIMPLE IRA may fit better, balancing the owner’s deferral against the cost of covering the team. A high-earning business owner with steady cash flow might even layer a defined benefit plan for six-figure deferrals.

A business owner should also weigh the Roth option inside these plans. A Solo 401k can accept Roth employee deferrals, letting a business owner pay tax now and pull the growth out tax-free in retirement, which suits a younger business owner who expects to be in a higher bracket later. The choice between a deductible contribution today and a Roth contribution depends on where a business owner expects to land in retirement, and that forecast is part of any real plan rather than a default. Most business owners blend the two over time, putting some money in the deductible bucket to cut today’s bill and some in the Roth bucket to build tax-free income later, which gives a business owner flexibility no single approach offers.

Our tax strategy consulting matches the plan to your business and team. To set up the right retirement plan, start at our new client inquiry page.