CPA Services for Small Businesses

A small business accountant does far more than file a return once a year. The day-to-day core is keeping your books accurate: reconciling every bank and card account, categorizing income and expenses, and producing financial statements that tell you whether you actually made money. On top of that sits the tax work, preparing the business return and coordinating it with your personal one, and the compliance work, payroll filings, sales tax, and the quarterly estimated payments the IRS expects a profitable small business to make. A good accountant also plays an advisory role, flagging when your entity type no longer fits, when an equipment purchase should wait until January, or when your margins are quietly slipping.

The difference between a bookkeeper and a CPA firm matters here. A bookkeeper records what happened. A CPA firm records it, files on it, and tells you what to do about it. For a small business, that combination keeps the IRS satisfied and keeps you from deciding on stale numbers. The IRS Small Business and Self-Employed Tax Center lays out the filing duties, and Publication 334 covers the recordkeeping standard, but neither tells you how to run your specific business.

Consider a small business doing $600,000 in revenue with one part-time employee and a few contractors. Left alone, the owner might reconcile quarterly, miss a chunk of deductible expenses, forget a state payroll filing, and underpay estimates, then pay a preparer to untangle it every April. With a firm on retainer, the books close monthly, the payroll and 1099 filings go out on time, the estimates are funded to the safe harbor, and the year-end return is a formality because the numbers were already right. Our client accounting services bundle that ongoing work so a small business gets the whole back office from one team instead of stitching together a bookkeeper, a payroll app, and a once-a-year preparer who has never seen the books.

Owners always ask what to look for when picking a small business accountant, and the honest checklist is short. Start with responsiveness, because an accountant who takes two weeks to answer a payroll question is worse than none when a deadline is bearing down. Ask whether the same team handles both your books and your return, since the value comes from one group seeing the whole picture rather than a bookkeeper and a preparer who never talk. Ask how they price, because a flat monthly fee is easier to budget than a surprise hourly bill, and confirm whether tax planning is included or charged on top. Ask about experience in your field, because a restaurant, a law practice, and an online store each carry their own tax quirks, and someone who already knows yours will catch what a generalist misses. The wrong fit only surfaces in April with a bill. The right fit is a year-round partner who tells you what the numbers mean and what to do next. That partnership is worth more to a growing small business than any single deduction, because staying ahead of the numbers compounds a little more every month you keep them current.

For most small businesses the honest answer is that it depends on your profit, and the right structure changes as you grow. An LLC by itself is not a tax status, it is a legal wrapper. By default a single-member LLC is taxed as a sole proprietor on Schedule C, and a multi-member LLC as a partnership. That default is fine when profits are modest, but it means every dollar of profit is exposed to the 15.3% self-employment tax on top of income tax.

The S corporation is where most profitable small businesses end up. You keep the LLC, or incorporate, and elect S status so the business pays you a reasonable salary and passes the rest of the profit through as a distribution that avoids self-employment and payroll tax. The catch is that the IRS reasonable-compensation rules require that salary to match the work you do, and you now have to run payroll and file a separate return.

A worked example shows why the election is worth modeling. Say your small business nets $120,000 and a reasonable salary would be $70,000. As a sole proprietor, roughly the full $120,000 faces 15.3% self-employment tax, about $16,000 after the base adjustment. As an S corporation, only the $70,000 salary carries payroll tax, near $10,700, and the $50,000 distribution avoids it, saving close to $5,000 a year before the added payroll and filing cost of maybe $1,500 to $2,500. Below about $50,000 of profit the savings rarely clear those costs, and above roughly $80,000 they often do.

The C corporation is a different animal. It pays a flat 21% at the entity level, and profits taken out as dividends are taxed again on your personal return, the classic double tax. C status can fit a business reinvesting heavily or chasing the qualified small business stock exclusion, but for a typical owner-operated small business it usually creates more tax, not less. The 20% qualified business income deduction under Section 199A also favors pass-throughs for many owners.

If the S election is the right move, the mechanics matter. You elect S status by filing Form 2553, generally within two months and fifteen days of the start of the tax year you want it to cover, though late-election relief exists and we use it often for a small business that decided mid-year. The election does not change your legal entity, an LLC stays an LLC, it only changes how the IRS taxes it. Watch the state side too, because not every state treats the election the same way. California still charges a 1.5% tax on S-corp income with an $800 minimum through the Franchise Tax Board, so the federal savings have to be weighed against a state cost. We run the breakeven on your real numbers first, handle the paperwork through entity formation and structuring, and the owner-side planning that goes with it lives on our business owners page. Getting the entity right early spares a small business from unwinding a costly structure later, which is far harder and more expensive than choosing well from the start.

The tax system is pay-as-you-go, and a small business with no withholding has to send the IRS its taxes four times a year rather than in one April lump. These estimated payments cover both income tax and self-employment or payroll tax, and most states with an income tax want a parallel quarterly payment. The federal due dates for 2026 income fall on April 15, June 15, September 15, and the following January 15. Miss them and you owe an underpayment penalty that works like interest on what you should have paid and when, even if you settle the full balance at filing.

The tool that removes the guesswork is the safe harbor. If you pay in at least 100% of last year’s total tax, or 110% when your prior-year adjusted gross income was over $150,000, you are shielded from the underpayment penalty no matter how the current year turns out. That lets a small business fund estimates off a known number instead of forecasting a year that has not happened. The IRS estimated tax rules spell out the schedule and the safe-harbor thresholds.

Here is how it plays out. Suppose your small business owed $32,000 in total tax last year and this year looks similar or a little higher. The 100% safe harbor means paying in $32,000 across the four quarters, about $8,000 each, and you are penalty-proof even if this year’s bill lands at $38,000. You would still owe the $6,000 difference at filing, but with no penalty attached. We usually recalculate mid-year when income runs hot or cold, so a strong quarter gets funded and a slow one is not overpaid.

Where owners get burned is treating estimates as optional in a growth year. A small business that jumps from $80,000 to $200,000 of profit and keeps paying last year’s small estimates will owe a large balance in April, and while the safe harbor spares the penalty, the cash still has to be there. We build the schedule with exact figures and dates for both federal and your state, and we tie the set-aside to your bookkeeping so the reserve is funded as the money comes in.

For a small business with lumpy income, the flat four-equal-payments approach can overpay early in a slow year or fall short when a big fourth quarter arrives. The annualized income installment method fixes this by letting you base each estimate on what you have actually earned through that point in the year rather than a flat one-fourth, which matches the payment to the income and can defer tax on a back-loaded year. It takes more calculation, so we use it when the income pattern justifies the work and stick with the simpler method when it does not. State estimates run alongside the federal ones for any small business in a state with an income tax, and because thresholds and dates vary, a business operating in more than one state can carry several estimate streams at once. We fold all of them into one calendar so nothing is missed.

Several changes landed for 2026 that touch nearly every small business, most from the 2025 tax law often called the One Big Beautiful Bill Act. The one that surprises people most is the contractor reporting threshold. For payments made in 2026, the floor for issuing a Form 1099-NEC rose from $600 to $2,000, so you send the form only to a contractor you paid $2,000 or more during the year. This does not change anyone’s duty to report income, it only changes who has to mail a form.

The Form 1099-K threshold moved the opposite way and reverted to its older level of $20,000 in payments and more than 200 transactions, undoing the much lower thresholds that had been scheduled. If your small business takes card or app payments, expect fewer of those forms than the prior rules threatened, though every dollar of revenue is still taxable and belongs on the return.

On the deduction side, the news is good for any small business that buys equipment. One hundred percent bonus depreciation is permanent again for qualifying property placed in service after early 2025, so a machine, a heavy vehicle, or a computer system can be written off in full the year you put it to work rather than depreciated over years. Section 179 expensing runs alongside it with a 2026 limit of $2.5 million and a phaseout that starts near $4.09 million of purchases, far above what most small businesses will ever spend. The 2026 Section 179 and bonus depreciation guide covers when to use each.

A few smaller figures matter too. The business standard mileage rate rose to 72.5 cents a mile for 2026, so a small business owner who drives for work should keep a clean mileage log because the deduction is worth more than most people expect. The Social Security wage base climbed to $184,500, which affects payroll for higher-paid staff and owners. We fold these changes into tax strategy consulting so the timing of a truck purchase or a new hire is a decision made with the tax effect in view, not discovered afterward.

Two more items deserve a mention for the right small business. The 20% qualified business income deduction stays in place, but it phases out for higher earners in specified service fields such as law, health, and consulting, so a profitable service business has to watch its income and, where it helps, manage salary and retirement contributions to stay within reach of the break. And for any small business that builds products or software, the immediate write-off of domestic research costs was restored, reversing the earlier rule that forced those costs to be spread over five years and freeing up cash for a business investing in what it sells. A small business that plans around the new numbers keeps more of its money, and one that ignores them simply overpays. We track the full set of changes each year so your small business return reflects the law as it actually stands in 2026, not as it stood two years ago when the old thresholds still applied.

Plenty of small businesses start on a spreadsheet or a cheap software subscription, and for a true side hustle that is fine. The line to watch is when the cost of a mistake, or the value of your own time, passes the cost of a professional. A few concrete triggers tend to signal that a small business has crossed it.

The first is employees or contractors. Once you run payroll or issue 1099s, the compliance load and the penalties for getting it wrong climb fast, and a missed state filing or a botched withholding deposit costs more than a year of bookkeeping. The second is entity complexity. If you have elected or are weighing an S corporation, you now need real payroll, a separate return, and a defensible salary, which is not a do-it-yourself project. The third is multi-state activity, because selling across state lines can create income tax and sales tax duties in places you have never visited. The fourth is simply revenue: around the point a small business clears low six figures of profit, the tax planning left on the table usually exceeds what a CPA firm charges.

There is also the time cost, which owners chronically underrate. If you spend eight hours a month wrestling with the books and you value your own time at $100 an hour, that is $9,600 a year spent on work a firm would do better for less, while you could have spent it on the business. We see this pattern constantly: an owner proud of handling their own books who is quietly missing deductions, filing late, and paying more tax than a modest fee would have cost.

Hiring a CPA does not mean handing over the checkbook and going dark. The best arrangement keeps you informed, with clean monthly statements you actually read and a person who answers when a notice arrives. Our client accounting services are built for the small business that has outgrown doing it alone but still wants to understand its own numbers.

If you decide to make the move, the transition is easier than most owners expect. We start by getting access to your existing books, whatever shape they are in, and your last two years of returns, then we reconcile and clean up the accounts so we are building on solid ground rather than inheriting someone else’s errors. From there the monthly rhythm takes over. Cost usually runs as a flat monthly fee that scales with transaction volume and complexity, not an hourly meter that punishes you for asking questions, and it is almost always less than the value of the owner-hours it frees plus the tax it saves. The honest comparison is never the fee on its own. It is the fee against the cost of the mistakes, the missed deductions, and the hours you would otherwise pour into work outside what you do best. For most growing small businesses, that math stopped favoring do-it-yourself a while ago. When you are ready, a new client inquiry starts the conversation.