With the help of Sageworks, a Raleigh, N.C.-based private-company data provider, Forbes.com has assembled a list of the 10 most profitable businesses--on a pretax basis--that could be run out of a home. The data were drawn from eight years worth of financial statements (nearly an entire business cycle) for tens of thousands of privately held U.S. companies with annual revenues under $1 million and bucketed by Internal Revenue Service classifications. Average pretax profits ranged from 8% to 14%.
But before you can graduate from side business idea and start earning a full-time living as a graphic designer, you'll need to build your skills—I recommend starting with reading the foundational book Graphic Design School and Steal Like an Artist, the incredible book by Austin Kleon about how to become more creative. To accelerate your education in becoming a graphic designer even quicker, check out the online courses Graphic Design Fundamentals and The Graphic Design Bootcamp. Then once you're an expert at your craft, you can further your education and move up to offering  more hands-on experiences like design sprints for higher-value clients around the world.
The home office deduction may become even easier to use in the near future. Colleen DeBaise wrote, in an early 2006 article entitled "Locking In The Home-Office Deduction," about efforts being made to simplify this tax deduction. She wrote, "The National Association for the Self-Employed, a small-business group in Washington, D.C., supports a simplified, standard deduction to ease the burden on home-based businesses. And perhaps someday, sweet relief will be granted: Two bills introduced in 2005 contain language for a standard home-office deduction, although neither has passed. One of the bills, the Small Employer Tax Relief Act of 2005, specifically calls for a standard home-office deduction of $2,500'¦. In the meantime, small-business owners have little choice other than to muddle through the form—or hire a tax adviser for help."
If you want to find a profitable online course idea in the next 3 days, join my free online course Find a Profitable Business Idea today. It'll walk you step-by-step through the process I've used to generate more than $15,000 in online course sales in a single week. Then once you're ready to start teaching your own online course, I recommend using Teachable, the easiest and most affordable platform to use for creating, hosting and selling your online courses. They also have a ton of free educational resources about how to get started with creating an online course (yes, even as a side business idea) when you sign up right here.
But if you get the green light to do it, starting a catering service is a relatively low-overhead way to create a new business. It’s a lot of work, but if you enjoy cooking, it could turn into a lucrative and fulfilling career. To get started with minimal investment, you could first cook in your customers’ homes and use their dishes. Also, a narrow specialization on a particular type of cuisine or event may help you attract clientele as you work develop a strong customer base.
Valentine's day. Birthdays. Weddings. The list goes on and on—throughout the course of a year, there are dozens of occasions when people need to order flowers. What's more is that once you're up to speed with this business idea, your costs can stay relatively low if you know where to source your flowers, and typical margins are in the neighborhood of 300% (or more) on cut flowers which makes this a particularly profitable side business idea in the right geographic area. Check out this amazing interview with floral designer, Sara Tedford of Ladybird Poppy to hear about how her floral design company started out as a side business idea of doing weddings and events for her friends and family.

Everyone knows that the quickest way to learn a new language is to mingle with native speakers. If you were lucky enough to be born in an English, French, Spanish (insert any of the world’s main languages) speaking country, then missing out on the opportunity to cash in on the skills you take for granted is exactly that – missing out! Use online communication tools, such as Skype or Google Hangouts, to connect with learners and leverage your privileges. Time is money, so package your hours into teaching sessions and you’re good to go. 
First you need to secure a domain name for your website. Then find a hosting service. You will want to create content for your website that is easily read and used by potential customers. If you have set prices for your services, it is best to be transparent about them. If your fees are individually based, then state that. Explain your expertise and success in the business on your "About" page. Be sure to have a "Contact" page with your information so clients can get in touch. Once your website is ready, all you have to do is market it.
There's an audience for everything, whether it's making dollhouse furniture or creating organic dog food. With a specialty e-commerce store, you can reach those customers who are seeking your specific products. All you need is a web-hosting service with an integrated shopping cart feature or with e-commerce software, and your business will be operational in no time. You can even work with vendors to ship products to customers on your behalf, which means you don't need to own a lot of inventory. [See Related Story: A Small Business Guide to E-Commerce Shipping]
Just about every company has a website that has the potential to collect data from its customers. Furthermore, many businesses store their customers' data, personal information – even credit card numbers – in their company computers. But, how many smaller firms can honestly say they know the data is safe from identity thieves and hackers? Most small companies can't afford to hire a full-time data security specialist. That's where your home-based security consulting business comes in. If you've got a background in IT, you could be working as a consultant helping small businesses shore up their data security.
The key to success in this business is being very disciplined in buying. Limit your car buying to popular models that you can turn over quickly, models that you have a strong understanding of current local pricing on, cars that you can buy at a significant discount to the price you believe you can fairly sell them for, and cars that are highly unlikely to need major work.
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