It’s often the case that business owners operate in sprint mode. Client work, payroll, the next big deadline. The business structure, compliance, and planning can often be overlooked or managed managed reactively. This is not unique to any business owner or entrepreneur—everyone deals with it.
An intentional and efficient quarterly review changes that. Ninety days is a long enough window to act on what you find, and short enough that problems haven’t compounded past the point of easy correction. The questions below are designed to be answered in a sitting and will help give an honest picture of where things stand with your business today.
Does Your Entity Structure Still Fit?
Let’s start with the foundation: worth asking if you’re still using the right structure.
If you’ve been running as a sole proprietor or single-member LLC and your business has grown substantially in revenue, S-Corp status might be worth exploring. Done right, it can cut your self-employment tax significantly—assuming you’re making enough profit to justify paying yourself a reasonable salary (it’s important to talk with a qualified professional about this requirement before moving forward).
In a partnership or multi-member LLC? It’s worth pulling out your operating agreement to check the ownership allocations. You’ll want to see if the way you’re splitting profits, losses, and guaranteed payments actually reflects how you’re operating today, not how you set things up two years ago. Partnerships often experience disruptions if left unaddressed for too long, making the case for adding it as a part of the quarterly review.
In short:
Does my entity type still match my income level, liability exposure, and where I’m headed?
Would a different tax election actually reduce what I’m paying?
Am I outgrowing my current structure?
The answers to all of these may very well be no, and if so, that’s great. But if yes, there may be tax savings and other potential benefits to the business to be found in exploring a switch. The important thing is to take a few minutes to verify where you stand.
Get Real About Your Numbers
Quarterly is a solid cadence for reviewing net income because it helps catch problems that can add up over time. A rough calculation before each quarter closes creates options and gives you flexibility to adjust your strategies based on those calcuations.
For instance, estimated taxes are a quarterly obligation. The IRS requires payments four times per year when you expect to owe $1,000 or more. Missing or underpaying quarterly estimates can trigger underpayment penalties regardless of whether you settle up at filing. The IRS publishes a quarterly estimated tax schedule worth keeping on the calendar.
Questions worth answering each quarter:
Are my estimated tax payments current? What is the deadline for this quarter?
Should I be making retirement contributions now to reduce taxable income?
If I’m an S-Corp, is my salary defensible relative to what the business is earning?
Clean Up Payroll and Contractor Records
For payroll-running businesses, quarterly is when W-2 compensation tracking should be verified not when it’s time to print forms. S-Corp owners running below a reasonable salary have a narrowing window to correct it each quarter. The IRS looks closely at owner compensation, and penalties for unreasonably low salaries aren’t theoretical.
On the contractor side: confirm W-9s are on file and payments over $600 are tracked. Anyone paid $600 or more in a calendar year requires a 1099-NEC. Late or missing 1099s generate penalties, and there’s no informal grace period.
A few things to verify each quarter:
Payroll funding deadlines (missing them means amended 941s, which is an avoidable headache)
Contractor payments year-to-date, especially as the $600 threshold approaches
W-9s collected and current for all active contractors
International contractor classification confirmed
Maximize Deductions Where Possible
Some deductions require planning ahead. Here are some you can review each quarter:
Health insurance premiums — if you’re self-employed or covering employees, these can be fully deductible depending on structure. Worth confirming the setup is right.
Retirement plan contributions — Plan selection has hard deadlines worth knowing in advance. Solo 401(k)s must be established by December 31 of the tax year, though funding can happen up to the filing deadline. SEP IRAs offer more flexibility on both. The point of reviewing this quarterly is that these decisions require lead time whereas waiting until tax season limits the options.
Business equipment — Section 179 vs. bonus depreciation — Two distinct tools worth understanding separately.
Section 179 lets a business expense qualifying assets in the year placed in service, rather than depreciating them over time. One important constraint: Section 179 cannot create or increase a net loss. If the business doesn’t have sufficient net income, the deduction is limited to that income figure — any unused portion carries forward to future years.
Bonus depreciation operates differently. It allows a percentage deduction on qualifying property (the rate has been phasing down from 100% and is currently at 40% for 2025 under current law) and can produce or deepen a net loss. The two mechanisms are sometimes confused — knowing which applies to your situation matters for planning.
Accountable plan — if you’re reimbursing yourself or employees for out-of-pocket expenses, confirm the plan is properly structured. This is a common area where deductions get left on the table.
Review the Books
Clean books each quarter prevents a compressed scramble at year-end and surfaces problems while there’s still time to address them. Worth scanning for:
Unreconciled accounts
Transactions in the wrong category
Duplicate or missing entries
Loans or capital contributions not properly recorded
Margin compression, unpaid invoices, and expenses that crept past budget tend to show up in the books before they show up anywhere else. Quarterly review catches them early.
Remember State and Local too
Federal obligations are only part of the picture. State and local compliance has its own calendar:
Annual reports or renewals for your LLC or corporation
State income or franchise taxes (many with quarterly due dates)
Sales tax filings if applicable
Business license renewals
State requirements vary significantly. The Secretary of State website for your state of formation is the right starting point. Some states are aggressive with enforcement; others send one notice before assessing penalties. Either way, late fees aren’t deductible.
Think One Quarter, And Then One Year, Ahead
Once the current quarter is reviewed, a few minutes of forward planning pays dividends:
Bringing on a partner? Operating agreement and structure may need updating.
Hiring a first employee? Payroll compliance obligations expand significantly — W-4s, I-9s, state withholding, unemployment insurance.
Expecting a revenue jump? Crossing certain thresholds changes tax treatment and compliance requirements.
Planning to raise capital? Entity type matters to investors. Worth getting the structure right before that conversation.
The bottom line is that businesses that address structural and compliance questions proactively spend far less fixing them later. An hour of quarterly planning is a better use of time than unwinding a problem that’s been compounding for three years.
Making It Count
A quarterly business review doesn’t need to be exhaustive, it just needs to be accurate and honest. The questions above are a starting point, not a full audit. But answering them consistently, four times a year, keeps the business in a position to act rather than react.
If the books are clean and the records are current, that’s a meaningful advantage that gives business owners more clarity and peace of mind. If not, the right time to address it is before the quarter closes rather than wait for the problem to compound.
This article is for educational purposes only and does not constitute legal, tax, or financial advice. Every business situation is different. Consult a qualified professional for guidance specific to your circumstances. If this content was helpful, please like the article and and subscribe for more updates from the Satoshi Pacioli team.