The 15 Most Profitable Small-Business Industries in 2016At the top of the heap is accounting and tax services -- plus other industries with low startup costs, according to report.

ByCarolyn Sun

Opinions expressed by Entrepreneur contributors are their own.

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This article originally published March 4, 2016.

Being talented with numbers can really pay off if you're looking to start a profitable business.

Accounting and tax services takes the top spot on the list of the most profitable type of small business with a generous 18.4 percentnet profit marginfollowed by real-estate services (15.2 percent), law firms (14.5 percent) and doctor's offices (13 percent) reportsSageworks, a financial data service that analyzed the net profit margin of more than 16,000 small businesses (that earned less than $10 million) between September 2014 and August 2015. Companies likeDue.comare helpful for tracking time and invoicing.

Related:Looking for a New Payment Company? You're 'Due' for Some Good News.

(The average net profit across all industries for this report's time period was 7.2 percent.)

What makes these industries profitable? For one, they're driven by human capital.

"Service industries," says Sageworks analyst Jenna Weaver, "are very common to find on the most profitable small-business list. This is generally due to lower overhead and startup costs. A lot of these industries you can start from your house."

While profit isn't the only matter for an entrepreneur to consider -- other factors to consider are whether the business matches his or her skills, what sort of licensing or training is required and how the business would fare during a recession -- it's an important place to start.

Related:How to Create a Facebook Messenger Chatbot For Free Without Coding

Here's the list of the 15 most profitable types of small businesses and their net profit margins.

Accounting, Tax Preparation, Bookkeeping and Payroll Services: 18.4%

"The accounting industry is consistently a top performer on our list," says Sageworks' Weaver.

No matter how the economy is doing, everyone needs accountants. Also, this industry tends to have low overhead and repeat clients.

Read This:The Tax and Legal Playbook: Game-Changing Solutions to Your Small-Business Questionsby Mark J. Kohler |Amazon|eBooks.com|Barnes & Noble

Management of Companies and Enterprises: 15.5%

This industry is made up of small, privately-owned offices of bank holding companies and other types of holding companies.

Some well-known examples of holding companies (that do not fall into the small-business category) are Warren Buffett'sBerkshire Hathawayand Carl Icahn'sICahn Enterprises.

Read This:Buffett: The Making of an American Capitalistby Roger Lowenstein |Amazon|eBooks.com|Barnes & Noble

Offices of Real Estate Agents and Brokers: 15.19%

While the real-estate market is largely dependent on the health of the economy, real-estate brokers and agents have low operating costs and all you need to get started is an agent or brokerage license.

Read This: Real Estate License Exams For Dummies, 2nd Editionby John A. Yoegel |Amazon|eBooks.com|Barnes & Noble

Automotive Equipment Rental and Leasing: 14.55%

With the on-demand economy on the rise, Sageworks analyst Libby Bierman says that people may be leasing and renting more cars using on-demand services such asZipcar-- along with more traditional rental services such asHertz.

Read This: Peers Inc: How People and Platforms Are Inventing the Collaborative Economy and Reinventing Capitalismby Robin Chase (Zipcar co-founder) |Amazon|eBooks.com|Barnes & Noble

Legal Services: 14.48%

Anyone who has ever hired a lawyer knows it's not cheap. Law, like accounting, generally has low operating costs as well as repeat clients. However, this business category includes not only lawyers, but notaries, settlement officers (who deal in the transaction of securities) and title search agents in real estate.

Read This:How to Open & Operate a Financially Successful Notary Businessby Mick Spillane |Amazon|eBooks.com|Barnes & Noble

Offices of Dentists: 14.41%

Dentists, like physicians, benefit from recurring patients, and while startup costs can be expensive -- dental equipment is quite costly -- the profession has the advantage of handling several patients at a time, plus many pay out of pocket.

Read This: How To Build The Dental Practice Of Your Dreamsby Dr. David Moffet BDS FPFA |Amazon|Indigo.ca|Barnes & Noble

Electric Power Generation, Transmission and Distribution: 14.02%

This category of small, privately-held electric power companies includes not just your traditional, fossil fuel electric powers but also hydroelectric, nuclear, solar, wind, geothermal and more.

Read This: Wind Power For Dummiesby Ian Woofenden |Amazon|eBooks.com|Barnes & Noble

Lessors of Real Estate: 14.01%

Lessors, also known as landlords, show that renting both residential and nonresidential properties is a profitable gig once you recover the initial costs of purchase.

Read This: The Book on Investing In Real Estate with No (and Low) Money DownbyBrandon Turner|Amazon|Barnes & Noble

Offices of Other Health Practitioners: 13.30%

这一类不同于医生怎么样?它's not, really. There is a census delineation between chiropractors, optometrists, mental-health practitioners and podiatrists -- who fall under this category of "other health practitioners" -- and all other types of physicians.

Read This: Start Your Own Medical Claims Billing Serviceby The Staff at Entrepreneur Media and Charlene Davis |Amazon|eBooks.com|Barnes & Noble

Offices of Physicians: 13.01%

Being a doctor requires years of training, certification and likely, medical school debt. However, doctors also benefit from regular clients and relatively low overhead costs.

Read This: The Medical Entrepreneur: Pearls, Pitfalls and Practical Business Advice for Doctorsby Steven M. Hacker MD |Amazon|Barnes & Noble

Commercial and Industrial Machinery and Equipment Rental and Leasing: 12.58%

它pays to rent or lease. These businesses typically rent or lease commercial machinery and equipment across industries.

Read This: The Complete Equipment-Leasing Handbook: A Deal Maker's Guide with Forms, Checklists, and Worksheetsby Richard M. Contino |Amazon|Indigo.ca|Barnes & Noble

Religious Organizations: 12.41%

宗教组织盈利的你们ar. Really. Remember, being not-for-profit doesn't mean your goal shouldn't be to make a profit. It's just how you distribute those gains. Instead of giving profits to shareholders, all of yours go to your organization's mission, which is the furthering of your church's aims. It has been a good year not only for churches, synagogues, monasteries, mosques and temples, but also for schools, colleges and universities that are operated by religious organizations.

Read This:Launch: Starting a New Church from Scratchby Nelson Searcy and Kerrick Thomas |Amazon|eBooks.com|Barnes & Noble

Management, Scientific and Technical Consulting Services: 12.05%

Some types of businesses that fall under this category are businesses that provide either management or consulting on a range of expertise, including human resources, marketing and environmental issues.

Read This: Start Your Own Consulting Business: Your Step-By-Step Guide to Successby The Staff at Entrepreneur Media and Eileen Figure Sandlin |Amazon|eBooks.com|Barnes & Noble

Specialized Design Services: 11.4%

Small businesses that specialize in interior, industrial and graphic design are flourishing, as the value of a product or business's function has become inextricably linked to appearance and design.

Read This:Start Your Own Graphic Design Business: Your Step-By-Step Guide to Successby Entrepreneur Press |Amazon|eBooks.com|Barnes & Noble

Office Administrative Services: 11.3%

These administrative businesses are the backbone of business operations across a variety of industries -- from food services to physicians offices -- and provide the day-to-day administrative services, such as record keeping, financial planning and billing.

Read This:Start Your Own Personal Concierge Service: Your Step-By-Step Guide to Successby Entrepreneur Press |Amazon|eBooks.com|Barnes & Noble

Carolyn Sun is a freelance writer for Entrepreneur.com. Find out more onTwitterandFacebook.

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