The IRS estimates business taxpayers spend 24 hours on average preparing taxes for 2024, with record keeping consuming the largest share of that time. For Allen County business owners, that time investment is also shaped by rules that don't apply in most other states. Understanding what's specific to Ohio — and what trips up even experienced operators — is the first step to a cleaner filing season.

Ohio Businesses Don't Pay Corporate Income Tax — They Pay the CAT

Most states levy a corporate income or franchise tax. Ohio doesn't. Instead, Ohio imposes the Commercial Activity Tax (CAT), a gross receipts levy that affects nearly a million Ohio small businesses — and it works very differently from a standard income tax.

The threshold recently changed in your favor: Ohio raised the CAT exemption to $6 million starting January 1, 2025, up from the previous $3 million threshold. If your business was previously filing CAT returns, confirm whether that obligation still applies.

Bottom line: The CAT exemption threshold doubled in 2025 — verify your gross receipts before assuming your prior-year filing requirements are unchanged.

One Rule That Catches People Off Guard

Here's a scenario that trips up more business owners than you'd expect: you invoice a client in December, the check arrives, and you hold it until January assuming that pushes the income to next year. It doesn't work that way.

The IRS rule of constructive receipt means you cannot hold income across tax years to avoid paying tax — if the money was available to you, it counts as income in that period. Plan your billing and collection timing with this rule in mind.

Quarterly Payments: Know Your Safe Harbor

If you're self-employed or running a pass-through entity, then estimated quarterly payments aren't optional — they're required.

When calculating how much to pay, you have two options: pay at least 90% of this year's projected tax, or cover 100% of last year's liability — whichever is smaller. That second option is known as the safe harbor provision, and hitting it keeps you penalty-safe regardless of what this year's income turns out to be. Estimates are due April 15, June 15, September 15, and January 15.

In practice: Base quarterly payments on last year's liability to remove the guesswork — you're protected from underpayment penalties even if income fluctuates.

Getting Your Records in Order

Disorganized records cost you in missed deductions and extra accountant time. Build a filing system throughout the year, not in April.

Tax Season Records Checklist

• [ ] All income records and 1099s received

• [ ] Receipts for business expenses (supplies, mileage, meals, dues)

• [ ] Payroll records and W-2s issued

• [ ] Business bank and credit card statements

• [ ] Last year's return for reference

• [ ] Documentation for any major asset purchases

When sharing financial files with your accountant, saving them as PDFs keeps formatting consistent across devices and simplifies secure sharing. Adobe Acrobat is a PDF tool that lets you add password protection directly in your browser — here's a possible solution for ensuring only authorized recipients can open sensitive documents. Keep those files organized and accessible throughout the year, not just at tax time.

DIY Software or a CPA: Which Makes Sense for You?

For Allen County businesses with employees or significant asset purchases, a CPA familiar with Ohio's tax structure is worth the investment. If you're a single-member LLC with clean books, software may be sufficient — as long as you've confirmed your state obligations.

Plan Deductions Before You File, Not After

For tax year 2025, 100% bonus depreciation has been restored as a permanent provision, meaning businesses can immediately deduct the full cost of qualifying equipment, machinery, and technology in the year of purchase — no multi-year depreciation schedule required. If you bought machinery, computers, or upgraded your point-of-sale system in 2025, that's a full deduction.

Other deductions Allen County business owners frequently miss:

• Home office (must be exclusively and regularly used for business)

• Vehicle mileage for business travel

• Professional development costs and membership dues — including your chamber membership

• Health insurance premiums for self-employed owners

Bottom line: Deductions require documentation you collect throughout the year — receipts and logs you simply can't reconstruct in April.

Stay Connected Through Tax Season

Tax season is easier when you're not navigating it alone. The Lima/Allen County Chamber of Commerce — through programs like the Leads Network and events like the Annual Breakfast and Beantown Biz Bash — connects you with fellow business owners who've faced the same questions. That network is often your best source for accountant referrals and hard-won practical strategies from people who understand the Allen County business landscape firsthand.

Frequently Asked Questions

Does separating my business and personal bank accounts really matter for taxes?

Commingled finances make it nearly impossible to accurately document deductible expenses and significantly raise audit risk. Separate accounts are also typically required to maintain liability protection under an LLC structure.

Separate accounts are foundational to clean books and legal protection.

What if I only started my business mid-year — do I still owe quarterly estimates?

If you began earning self-employment income mid-year, you may still owe estimates for the quarters in which you earned income. Missing payments in earlier quarters can result in underpayment penalties even if you pay the full amount due at filing.

Start quarterly payments as soon as you begin earning self-employment income.

Can I deduct a home office if I work from home occasionally?

The IRS requires the space be used regularly and exclusively for business — a corner of a shared living room doesn't qualify, but a dedicated room does. You can deduct a proportional share of rent or utilities based on the office's square footage relative to your home's total square footage.

"Sometimes I work there" doesn't satisfy the IRS exclusivity requirement.