Obviously some of these small business ideas have more earning potential than others, but what they all share in common are relatively low barriers to entry and the flexibility to work at them for a limited amount of time per week. I also tried to focus on side business ideas that have some sort of online component to them, since that's what I love most.
Public notaries primarily serve as validators of, and impartial witnesses in public legal documents, especially those related to affidavits, oaths, deeds, estates, special-powers-of-attorney, and business agreements. Depending on the state, a full-time notary public earns an average annual salary of $36,000, which makes it a great business idea to do as a side hustle as you bring in money through other ways. If you want to get started with this business idea, here are the requirements and steps you need to consider in the US.
There are at least three teenage entrepreneurs who’ve already earned astonishing amounts of money by launching hand-made jewelry business ideas: M3 Girl Designs’ Maddie Bradshaw, Bella Weems of Origami Owl, and the girl behind DesignedByLei. With the industry set to shine in the near term via a brisk annual growth rate of 5-6%, the market is ripe for new entrants to this business idea who can offer sparkling new takes on how to craft appealing handmade goods.
Though certainly not for everyone, recycling the containers from products left strewn around on the ground can become a surprisingly decent side business idea if you put in the time. Attending events like street fairs and outdoor concerts can be a great starting place. Put on a clean shirt, jeans, apply your sunscreen, grab a cheap pick-up tool like this one, sturdy plastic bags, and you can sell them for upwards of $4.00/pound on eBay.

No one knows your hometown like you do, and you can translate that into cash by leading tours of your city. The website vayable.com allows you to set up and guide tours around a particular cultural experience. If you’re the foremost expert on ghost stories, beer, architecture, or crime (or anything else!) in your town, then you can start leading tours for people who want to hear your stories.
Mechanical Turk: Amazon's Mechanical Turk is a resource for doing human-intelligence tasks, or as the site commonly refers to them, HITs. You get paid a very small fee for any given HIT and you'll need a good deal of volume to make a substantial amount of money. But it is a resource you can use in your spare time to generate a small income online. 
If I have a blog that is getting 100,000 page views a month that means that I’m probably getting at least 50,000 people to the site (most blogs will do between 1.2 to 1.4 pages per session). That means I have to try and get some small percentage of those people to buy something from me if I really want to do well. If I can’t get them to buy something then (in some cases) I have ads running on the site that will make me money anyways.
Many of my readers have started proofreading from their iPads, scanning legal documents for court reporters as a result of the Proofread Anywhere eCourse I recommend. You can read some of their testimonials in the comments on this post. They offer a 7-day intro course free so you can decide if that line of work is right for you before you pursue the training.
Pet sitting usually involves going to someone else’s house to take care of furry loved ones. Pet sitting could even involve living in someone’s house while the client is away. You have to think about the types of services you’ll provide and the types of animals you’ll take care of, but generally pet sitting is a low-cost, high-pleasure business idea.
Today, tens of thousands of people are considering starting their own business, and for good reasons. On average, people can expect to have two and three careers during their work life. Those leaving one career often think about their second or third career move being one they can run out of their own home. The good news: Starting a home-based business is within the reach of almost anyone who wants to take a risk and work hard, as are a plethora of other low-cost ideas.
Teaching and tutoring English as a second language is a great way to make a solid side business idea work, not to mention opening doors for you to travel the world if you'd like. While full ESL (English as a Second Language) accreditation is recommended, as long as you’re a native speaker, there are people in countries such as Hong Kong or the UAE who are willing to pay upwards of $25/hr for you to teach them English via Skype. Indeed, Learn4Good and Remote.co often have remote english tutoring jobs posted, check back frequently. Then once you land that remote job, you'll need somewhere more professional than your dining room table to meet with students—check out this post about how to find places to work remotely and you'll officially graduate this side business idea into a full-time endeavor for yourself.
I think you can do well with this business if you start with people in your neighborhood and ask them if you can have an opportunity to perform this service for them. Word of mouth will travel fast if you provide a good value. I think the key to doing very well here is to package your service. For example, try to find a price that works for mowing, weeding and fertilizing altogether.
 @Philip Taylor The point is that this is design is specialized job and is not just a side job. Just because an individual may know a thing or two about the technical aspect of a program does not warrant them to fill that role as a designer. There’s more than just drawing a mark in a program. There’s strategy in brand development, marketing, etc… This is insulting to the creative industry to label logo and branding as a scheme to make extra money.
As a pet sitter, you would get to spend time with other people’s animals while they’re away for business or on vacation. Simply follow your client instructions, as well as your own experience and expertise, to provide care and comfort to these pets. It’s an easy way to get paid, especially if you’re an organized and trustworthy individual with a reputation for or history of animal care.
The key to becoming a mompreneur is finding something that you love. Once you figure out what it is that’s calling you, you’ll need to figure out how this can be incorporated into your family’s schedule. For instance, busy moms out there with very limited spare time can take virtual wellness classes and online seminars. You can run these classes a few times a month, which means you’ll still be able to serve just as many people. Either as an in-person, or virtual wellness coach, you can help busy women find their balance just the same.
Starting a business in this field will require some experience, but as long as there is anxiety, there will be a market for coaching people to create and deliver presentations. Invest in video equipment or use a smartphone to record students as part of the coaching process. If you have a background in radio or TV or specific experience in high-profile public speaking, all the better.

7. Sell your skills as a freelancer. You might be surprised by the tasks people are willing to pay to have done. A skill that seems ordinary to you might be extraordinary to someone else, such as dog walker, Website designer, home organizer, marketing consultant, or personal cook. There is no reason you can't sell the skills you already have for some extra money.
From personal experience as a freelance content marketer, I can vouch for the profitability in this industry. I grew my side hustle into a $160,000/yr business before quitting my day job to pursue this business idea full-time; all you need is the right skills and experience to back it up. With startups, established brands, and even notable influencers needing to build credibility and grow their brands, professionals who can serve up compelling content enjoy a huge demand for their services. And, since brands will always need high quality content to bring in new customers, your skills will always remain an asset to invest in—especially since the nature of creating a content marketing strategy is an ever-evolving one. Start by tapping into your existing network with this business idea and begin tracking down local small business owners who could benefit from your marketing tactics, do a bang up job, ask for referrals and grow from there to the point where you're doing blogger outreach and spreading out to a wider market.

This is the best way to boost your earnings, as you have the most leverage at the moment that a company wants you but isn’t sure whether it can get you. Use that to your advantage in negotiations. Another benefit of getting a bump up when you switch jobs is that the percentage boost will be baked into all your future raises, elevating your lifetime earnings. Here’s how to negotiate your salary.

It’s something akin to picking stocks. You want to buy undervalued domains, and sell them later on at a higher price. For example, you can pick a domain that is out of favor, but could be related to some future event. So if you decide that the stock market is likely to crash in the future, you can buy a domain that includes the words stock market crash during a rising market, and then sell it in a falling market.

Online savings accounts usually come with crazy good interest rates to help you grow your money faster (regular in-person banks can’t offer rates as high). We’re fans of CIT Bank and Discover Bank (among others) because their interest rates are often over 25 times the national average. That means the money in your savings account will grow 25 times faster than the pace it’s most likely growing at now. Really, though, you can’t go wrong with pretty much any online savings account that offers over 1.50% APY 🙂
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