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Ohio has more than 600 cities and villages that levy their own income tax. Your dental practice owes net profit tax where it operates, you may owe again where you live, and you must withhold for each city your team works in. Here is how to keep it straight.
Ohio is one of the most complicated states in the country for local taxes, and dental practice owners feel it more than most because a practice touches all three layers at once: the business pays tax where it operates, the owner pays tax where they live, and the practice withholds tax for every employee based on where that employee works. Most states have a single state income tax and stop there. Ohio has the state tax plus more than 600 municipal income taxes administered in three different ways, and a practice can easily owe in two or three cities without realizing it.
The good news is that the system, while dense, follows a small set of rules. Once you understand who administers your city, the difference between where you work and where you live, and how withholding works when your team crosses city lines, the complexity becomes manageable. Here is the practical version for a dental practice owner.
Ohio lets individual municipalities levy their own income tax, and more than 600 of them do, according to the Ohio Department of Taxation. Rates commonly run in the range of 1 to 3%, and they apply to two different things: the wages earned by people working in the city, and the net profit earned by businesses operating in the city. For a dental practice, both apply. Your team's wages are taxed by the city where your office sits, and your practice's profit is taxed there too as municipal net profit tax.
This is a separate obligation from your Ohio state return and from your federal return. It does not replace them, it sits on top of them. It is also a recurring one, not a once-a-year afterthought: municipal net profit tax generally runs on quarterly estimated payments with an annual return to true up, so the practice needs its profit tracked cleanly all year rather than reconstructed each spring. And because the tax is local, the rules about who collects it, who owes it, and where, are not uniform statewide. That is where practices get tripped up, so the first thing to figure out is who actually administers the tax for your city.
Ohio cities administer their municipal income tax in one of three ways, and knowing which one applies to you determines where you file and remit.
Most municipalities do not run their own tax office. Instead, they contract with one of two regional agencies. The Regional Income Tax Agency, known as RITA, administers the tax for more than 300 Ohio municipalities. The Central Collection Agency, or CCA, administers it principally for the City of Cleveland plus roughly three dozen other municipalities. If your practice is in a RITA or CCA city, you file and pay through that agency's system, not directly with the city.
The largest cities generally administer their own tax. Columbus and Cincinnati, for example, run their own income tax divisions, so a practice in one of those cities files directly with the city. The practical takeaway is simple but easy to miss: your filing portal, forms, and deadlines depend on which of the three buckets your city falls into, and a multi-location practice can straddle more than one. Setting this up correctly in your books from the start, with a clean, consistent chart of accounts, is what keeps a two-city practice from turning into a filing scramble at year end.
Here is the distinction that surprises most owners. Ohio municipal tax follows two separate principles at the same time. A city taxes income earned within its borders, and a city taxes its own residents on their income. When those are two different cities, and for a practice owner they very often are, you can end up in both.
Your practice pays municipal net profit tax to the city where the office operates, because that is where the income is earned, and it applies to your net profit no matter whether you are taxed as an S-corp or an LLC. Separately, you as the owner may owe municipal income tax to the city where you live on the income that flows through to you. Many residence cities offer a credit for tax already paid to the city where you work, which softens or eliminates the double hit, but the credit is not automatic and it is not the same in every city. Some give a full credit, some partial, some none. So the pattern for an owner who lives in one Ohio city and practices in another is often two municipal filings, coordinated so you are not paying the same dollar twice. This is exactly the kind of thing to confirm with your tax preparer for your two specific cities, because the credit rules are what decide how much you actually owe.
Picture a common setup to see how it plays out. Your practice operates in a RITA suburb that levies a 2% income tax, and you live one town over in a city that levies 2.5%. Your practice remits net profit tax and employee withholding to the office city through RITA. On your personal return, your residence city taxes the practice income that flows through to you, then credits some or all of the tax already paid to the office city, depending on that city's credit policy. If the residence city grants a full credit up to its own rate, you owe little or nothing extra there. If it caps the credit, you owe the difference. Two filings, coordinated, with the credit doing the work of keeping you from paying full freight twice. Get the credit wrong and you either overpay for years or draw a notice, which is why the specific credit rule for your home city is worth pinning down and building into how the return is prepared.
As an employer, your practice must withhold municipal income tax from your team's wages and remit it to the correct city, which is generally the city where the employee actually performs the work. For a single-location practice with a stable team, that is straightforward: you withhold for the city your office is in. It gets more involved when employees work in more than one city, which is where Ohio's occasional-entrant rule comes in.
Under Ohio Revised Code 718.011, an employer generally is not required to withhold for a city where an employee performs services on 20 or fewer days in a calendar year, with some exceptions, including when that city is the employee's principal place of work. Once an employee crosses the 20-day threshold in a given city, withholding for that city can begin. There is also a small-employer provision: a qualifying small employer, as defined in the statute, generally withholds to the single city where the employer's fixed location sits, regardless of where employees travel. For a typical single-office dental practice, this usually means you withhold for your office city and little else changes, but it is worth knowing the rule exists before you add a second location or send staff to work elsewhere regularly.
If you operate in more than one city, the complexity multiplies rather than adds. Each location can mean a separate net profit tax obligation, potentially a different administering agency, and withholding split across cities based on where each employee actually works. A hygienist who splits the week between your two offices may generate withholding in two cities. Net profit may need to be apportioned between the municipalities based on where it was earned. None of this is unmanageable, but it does not run itself, and it is the single biggest reason a growing Ohio practice should have its payroll and books set up deliberately rather than discovering the obligations after the fact.
This is where good bookkeeping earns its keep. Tracking wages by work location, remitting to the right agency on the right schedule, and keeping the net profit apportionment clean is ongoing work, and it is the sort of thing a bookkeeper handles month to month so the numbers are already correct when the filings come due. Ohio's municipal system rewards practices that are set up right and punishes the ones that improvise.
P.S. Reciprocity Accounting tracks your team's wages by work location and keeps your municipal net profit clean month to month, so Ohio's local tax filings are a non-event instead of a year-end scramble. See how we can help your practice.
Often both. Your practice owes municipal net profit tax to the city where the office operates, because that is where the income is earned. As the owner, you may separately owe municipal income tax to the city where you live. Many residence cities give a credit for tax paid to the work city, which reduces or eliminates the overlap, but the credit varies by city, so confirm how your residence city handles it.
Check the agency directories. RITA administers the tax for more than 300 municipalities and lists them on its site, and CCA does the same for the cities it serves. If your city is on neither list, it likely self-administers, as Columbus and Cincinnati do, and you file directly with the city. Your administering agency determines your forms, portal, and deadlines.
Generally not, up to a point. Under Ohio Revised Code 718.011, an employer usually is not required to withhold for a city where an employee works 20 or fewer days in a year, with exceptions such as the employee's principal place of work. Once the employee passes 20 days in that city, withholding for it can begin. A qualifying small employer generally withholds only to the city of its fixed location.
Each location can create its own municipal net profit tax obligation and its own withholding, potentially through different administering agencies. Net profit may be apportioned between the cities based on where it is earned, and wages are withheld based on where each employee actually works. It is manageable with deliberate bookkeeping, but it is the main reason a second location warrants a fresh look at how your payroll and books are set up.