18 Side Jobs That Can Earn You $100 a Month

This post will introduce 18 of the Best Side Jobs for salarymen and explain the points to consider when starting a Side Job.

There are probably many salarymen who are concerned about Side Jobs.

It is a natural consequence of this that they start to think about other ways to earn money besides working as a company employee.

Many salarymen are interested in Side Jobs, and as of 2022, the types of Side Jobs that salarymen can do are increasing rapidly. 

This is because apps and services have progressed, and more opportunities to utilize spare time are available.

18 Side Jobs that can make $100 a month for salarymen

For those who want to make the most of their commuting time or make up for lost overtime pay, $100 a month is a realistic goal.

The following list of Side hustles where salarymen can earn $100 a month introduces various Side hustles that you can do in your spare time or your day job.

Please find the one that suits you best.

Earn money in your spare time (Internet business)

This is a great way to make money while you're busy.

Internet business is a business where you can earn money by buying and selling goods and services through the Internet.

  • You can utilize your spare time to not interfere with your main work.
  • Easy to start with just a smartphone or PC.

Many of them can be started with a small initial investment, making them a good choice for salarymen new to Side Jobs.

(1) Resale

This is the process of purchasing popular items and selling them higher than the purchase price.

The advantages are as follows.

  • If you use a flea market app, you can buy unused items lying around your house.
  • You can train your connoisseurship skills.

You can train your connoisseurship skills.

The shipping method has also become more accessible, making it easier for office workers with limited time to get started.

The cautions are as follows.

  • In some cases, a permit is required, and some products are prohibited from trading.
  • In the case of flea market apps, the reputation of the users will affect the sales.
  • There is a risk of holding inventory.

When starting out as a side business, be sure to read the laws and the terms and conditions of the flea market app.

(2) Running an online store

Running an e-commerce site means opening your own store on the Internet and selling your products and services.

There are two main ways to open an e-commerce site: rental shopping carts and large shopping malls. There are two main store opening methods: rental shopping carts and large shopping malls. The rental shopping carts are easy to open, and the large shopping malls easily attract customers.

The advantages are as follows.

  • You can make a lot more money than you can with Resale.
  • It's easy to get started because most of the trading hours are during off-peak hours when office workers are on their way home from work.

It's easy to get started.

The cautions are as follows.

  • There are a lot of rivals, and there is a risk of holding inventory without selling.
  • You need to be able to attract customers.
  • Suppliers are also important.

First, find a reliable and inexpensive supplier and consider the best way to open your business store. It's also good to use social networking sites and blogs to attract customers.

(3) Import business (for advanced users)

Import business refers to purchasing products from overseas and selling them in Japan.

Various types of products can be handled, such as miscellaneous goods, food, clothing, and wine.

The advantages are as follows.

  • Enjoyment of being able to use your own sense and experience
  • The fun of searching for a treasure trove of goods that could be very profitable.

A customs broker's qualifications and foreign language skills may also give you an advantage in negotiations. In that sense, it can be said to be a Side Job where you can "make use of your qualifications and abilities.

The cautions are as follows.

  • The most important thing is research and market analysis to determine what products are likely to sell.
  • Be careful about the timing of cashing in, as it is affected by exchange rates.
  • The initial investment for purchasing may be high.
  • There is a possibility of being stopped by customs.

Although it is gratifying, it is an "advanced" side business for salarymen who have limited time and money to spend.

It is a high-risk, high-return business, but you will earn more money and have a sense of accomplishment if you succeed.

(4) Affiliate 

Advertising income (Affiliate Adsense) is a business where you post advertisements on your blog or social networking site and earn money by having people click on them or purchase your products or services.

There are a variety of advertising projects ranging from groceries and daily necessities to accessories and cosmetics.

The advantages are as follows.

  • Because there are many projects, it is easy for salarymen with no experience to start a side business.

It is easy for salarymen with no experience to start a side business.

The cautions are as follows.

  • It takes time, patience, and popularity before you can start earning a decent income.
  • There is a risk that your private information may be exposed. 
  • Algorithm changes in advertising media may affect your earnings.
  • You may be asked to revise your content or not be screened out.

In many cases, videos or photos of the target product or service users are required to earn advertising revenue.

However, as a particular famous Youtuber said, "It's easy to find out where you live," and it's not uncommon for your location to be identified from the photos and videos you post.

When starting out, I recommend that you think about how much of your private life you want to make the public take sufficient measures and carefully check the screening criteria for advertisements.

It is also necessary to gather information frequently to respond to algorithm changes.

There are many Side Jobs where you can use your experience as a salaried worker or what you learned at school.

  • As long as you can meet deadlines, you can work anytime with a high degree of flexibility.
  • There is no need for initial investment, and it is easy to start with just your own body.
  • It can lead to self-improvement and can be used in your primary job.

The following businesses related to professional skills are suitable for people who can continue to work hard and are indoor people.

If you think, This applies to me! If you believe you fit this description, please find a Side Job to utilize your skills.

(5) Programming development

Programming development is earning income by receiving and delivering programming work.

The advantages are as follows.

  • You can make use of the skills and contacts you learned at school or at your day job.
  • There are also ongoing projects to earn a relatively stable second income.

The cautions are as follows.

  • It is an industry that is constantly advancing, so steady improvement of technical skills is necessary.
  • To get high remuneration, you need to have a good track record and steadily build up your track record.

Many Side Jobs welcome salarymen, so check out outsourcing matching sites.

(6) Web writer

Web writing is a job where you write posts for web media.

The volume and content vary, from writing only to interviews.

The advantages are as follows.

  • Web writing skills become an asset.
  • You can start with low risk if you register with a crowdsourcing site.

In addition, the communication skills you developed during your salaried career can be a great weapon.

The cautions are as follows.

  • The unit price is low, and it is necessary to work on many projects to earn a large amount of money.
  • Work and private life tend to be blurred.

As a web writer, you can acquire SEO, keyword selection and organize and explain things in an easy-to-understand manner. These are skills that can be fully utilized as a company employee.

Since the unit price is low, it is difficult to use it as a Side Job to make an income initially, but it may be a shortcut to move up a notch as a salaried worker.

Active in your field of specialty (Lecturer/Consulting)

18 Side Jobs for Salarymen That Can Earn $20,000 a Month Introducing examples of Side Jobs that busy office workers can do on Side 3. Working in Your Field of Expertise (Teaching/Consulting)

If you want to be active in your area of expertise, or if you want to turn your hobby into money, "lecturing/consulting" is for you.

You can set your own hours and prices, so even if you are a salaried worker, you can devise your own schedule to avoid conflicts with your primary job.

You will be thanked by people and feel rewarded.

I want to feel rewarded as well as paid! On the other hand, it is said that you need to be creative to attract customers.

(7) Private Lesson

Private lessons are lessons given by one teacher per student.

There are various genres such as English conversation, music, art, PC skills, cooking, and voice training.

The advantages are as follows.

  • You can start with little initial investment because you can use the skills you already have.
  • If the course is held online, students can be found worldwide.

You can also teach Japanese to foreigners living abroad by taking advantage of the online feature.

The cautions are as follows.

  • Since the income is determined by the number of students, the income fluctuates significantly from year to year.
  • A certain amount of results are required.
  • You need to have the skills of the genre in question and the skills to teach others.
  • Some genres have many rivals, while others are difficult to match.
  • Challenging to deal with in case of incompatibility with students.

There are many matching sites, and some of them have many active people as salaried instructors, so check them out.

(8) Seminar instructor/consulting

Seminar lecturing/consulting is a job where you conduct seminars in response to requests and get paid for it.

Popular topics for lecturers include business etiquette and self-development. As for consulting, there is demand in various fields such as SEO, IT, and management.

At first glance, it may seem complicated, but even salarymen can be active in weekend consulting and spot consulting.

It is one of the Side Jobs that many people who started as salaried workers have started their own Businesses after getting on track.

The advantages are as follows.

  • You can build a network of people through seminars, and it can lead to your next job.

The cautions are as follows.

  • You will have to devote most of your vacation time to your second job.
  • It is difficult to attract customers and requires ingenuity.
  • It is difficult to attract customers and requires ingenuity.
  • Excellent professional skills are required.

It is a job that requires daily self-improvement.

(9) Sports instructor

Sports instructor is a job that involves teaching sports to students.

It may seem surprising as a Side Job for a salaried worker, but it is a job that can be compatible with your primary job.

Many sports, from major sports like golf and soccer to minor marks.

The advantages are as follows.

  • There are students at night and on weekends to avoid conflicts with your day job.
  • Refreshing physical activity.

The cautions are as follows.

  • You need to think about compensation if you or your students are injured.
  • There are offline and online jobs, and it is good to do both.

Offline jobs include "diet management" and "self-directed training."

Easy to Earn (Double Work)

Double work has the following characteristics.

  • You can make use of your spare time.
  • You can get cash immediately.

It is an easy Side Job to start because it fits in with the off-peak hours of salarymen, such as holidays and evenings on the way home from work.

These jobs can be found on part-time job information sites.

It is recommended for those who are physically fit.

(10) One-time Job

A one-time job is a contract job you do for a short period, such as one or two days, or a few weeks at the most.

There are many different types of jobs, from part-time moving jobs to cash register jobs to TV program staff. You can choose the type of work you want to do.

The advantages are as follows.

  • With the advent of matching apps, there are more and more opportunities to work as a Side Job.
  • The duration of the job is short, so you won't get involved in annoying human relations.

The cautions are as follows.

  • You need to adjust your schedule to not interfere with your primary job.
  • Some companies prohibit Side Jobs in the same industry.

One of the advantages is that you can quit immediately if you feel that you want to focus on your main job or that it's not for you, but as a member of society, you want to avoid cancellations.

However, as a member of society, you do not want to cancel your work. If you are a salaried employee, please make sure to check the work rules of your primary job.

(11) Delivery driver

A home delivery driver is a person who delivers mail-ordered goods or orders food.

The advantages are as follows.

  • If you use a bicycle, you can get rid of lack of exercise.
  • If you like to drive a car, you can combine it with your hobby.
  • If you are a salaried employee, you may be able to save on taxes by keeping receipts for expenses incurred on sales and filing a tax return.

The cautions are as follows.

  • The time commitment is relatively long.

Many contracts such as Uber Eats are part-time or in a form that does not constitute an employment relationship, so make sure you read the compensation section carefully when starting out as a Side Job.

(12) Examination supervisor

An exam proctor is a person who distributes and collects questions and answer sheets and watches over the exam to make sure there is no cheating during the exam.

The advantages are as follows.

  • You don't need to be physical.

The cautions are as follows.

  • It is easy to feel stressed in a tense examination room.
  • You may feel that the remuneration is low for the time commitment.
  • There is a dress code (suit, analog watch, etc.)

Due to the nature of the job of "test proctor," it is a Side Job that is more in demand by working people than students. In addition, there is often a dress code, but most salaried workers can clear it.

The following are some characteristics of "investment-related businesses" that are often mentioned as Side Jobs that are easy for salarymen to start.

  • The upfront investment is required.
  • You can start with just a smartphone or PC, so you don't have to carry inventory.
  • You can do it in your own time.
  • You can develop the ability to read the times.
  • There is a possibility that you can make a significant profit.
  • There is a risk of loss of principal.

There is no such thing as a "100% sure money" financial product. There is no such thing as a "100% sure money" financial product.

There are various advantages and risks, but it is essential to understand that there is a risk of loss of principal in any financial product.

This Side Job is recommended for salarymen who have surplus assets.

(13) Investing in stocks

There are three types of rewards for investing in stocks.

  • Gains from the sale of stocks (capital gains)
  • Shareholder unique benefits (special shareholder benefits)
  • Profits from dividend distributions (income gains)

The cautions are as follows.

  • You have to be careful because it is greatly affected by the economy.
  • Using the knowledge you have acquired in your primary Business may be regarded as insider trading.

If you are a salaried worker, please avoid violating the Financial Instruments and Exchange Law.

(14) FX

FX is an abbreviation of "Foreign Exchange," which originally means "foreign exchange trading," but it has become a general term for "foreign exchange margin trading."

The advantages are as follows.

  • It is less susceptible to economic fluctuations than stock investments.

The cautions are as follows.

  • There is a risk of losing a lot of money when leverage is applied.
  • Since this is a Side Job for salaried workers, they may not trade promptly when they want to.

(15) REIT

REIT stands for "Real Estate Investment Trust" and refers to a real estate investment trust.

It is a financial product whose management is entrusted to specialists, and it refers to those that target real estate.

When it comes to "investment," many salaried workers may think of "stock investment" or "FX," but REITs are also one of the most popular financial products.

The advantages are as follows.

  • You can start with less money than real estate investment.

The cautions are as follows.

  • Transaction fees are required.
  • There is a risk of bankruptcy of the investment corporation.

(16) Real estate investment

Real estate investment refers to earning rental income by managing apartments or making a profit by buying and selling land.

The investment targets include apartments, condominiums, and land.

As a familiar example, a businessman may buy a house and then get transferred and rent out the house as it is.

The advantages are as follows.

  • If the rental income is stable, it can be an excellent fixed income.
  • Effective use of inheritance.

One possible caveat is that there are many risks to consider.

The cautions are as follows.

  • Liquidity risk: Since it is a large purchase, it is difficult to find a seller, and the price has to be lowered.
  • Disaster risk: The property becomes unusable due to natural disasters.
  • Vacancy risk: Vacancies cannot be filled, and rental income cannot be earned.
  • Interest rate fluctuation risk: If you acquire a property with a floating interest rate, the interest you pay will increase as the interest rate rises.

Real estate investment is often "middle-risk, middle-return, and more reliable than other investment products," but it is not without risk.

If you are interested in real estate investment, why don't you start managing a single apartment?

Franchise Management

There is also a way to earn money as an owner while working as a salaried employee.

If you have a lot of land, you may utilize it.

The initial investment is higher than other Side Jobs.

The initial investment is higher than other Side Jobs. - Depending on the type of Business, you can focus on management without standing in a store.

The initial investment is higher than other Side Jobs.

The initial investment is higher than other Side Jobs. This is a good Side Job for highly motivated people to become independent.

It is also possible to join a "franchise" system and eliminate the administrative work involved in running a business.

(17) Laundromat management

Running a laundromat means setting up a laundromat and earning money through usage fees.

The advantages are as follows.

  • No labor costs due to self-service.
  • The initial investment is high, but running costs are relatively low (only utilities and detergent are required).
  • There is little risk of uncollected payments.
  • Since it is close to a lifeline, it is not easily affected by the economy and will grow as the population ages.
  • It is difficult to be affected by the economy because it is close to a lifeline and will grow as the population ages.
  • It is relatively easy to manage, so it can be controlled by salaried workers in their spare time.

There is also the fun of expanding depending on your ideas, such as differentiating yourself with ancillary services such as Wi-Fi, washing machines for shoes, and detergent bottle keep.

The cautions are as follows.

  • Easy to start = easy for competitors to enter the market, and price fluctuations are likely to occur.
  • There is a risk that the laundry will not be collected.
  • The location is essential (near a housing complex).

(18) Parking Lot Management

Parking lot management means earning income by managing a monthly or coin-operated parking lot.

The advantages are as follows.

  • There is no labor cost, so it is easy to get rid of it.
  • Can utilize surplus land.
  • Easy to restore to the original state.

The cautions are as follows.

  • Profitability is low.
  • Troubleshooting needs to be carefully decided (e.g., parking violation)

At first glance, parking lot management seems simple, but until you get used to it, it is safer to outsource it to a management company.

If you manage independently, you may receive calls to deal with problems while working, so be careful if you are an office worker.

Also, if you have a small piece of land that is not suitable for a parking lot, parking lot sharing is a popular option.

Try searching for "parking lot share.

Salarymen doing Side Jobs! Actual examples

Running a nail salon literally means hiring manicurists and running a nail salon.

The advantages are as follows.

  • You don't have to be involved in the salon's operation but concentrate on the management.

The cautions are as follows.

  • The location is also essential in attracting customers, so don't compromise on the choice of property.
  • Do not be in a hurry to choose staff.

The cautions for a salaryman to earn $100 on the Side Job

To earn $100 on the Side while working as a salaried employee, there are a few things that you need to be aware of, two major ones being

  • Tax stamp
  • If you are working as a salaried employee and want to earn $100 on the Side, there are two main things you need to keep in mind.

It is also essential to balance your main job and your personal life.

  • It is also essential to balance your main job and your private life.
  • Make a schedule for your second job to not interfere with your primary job.
  • Obtain the understanding of your family.


When it comes to side jobs, many people have the image of "making a million yen" or "unemployment income."

However, goals that are too far away can often discourage people from trying. Also, it is not good if you start a side business with vague knowledge and end up evading taxes without realizing it.

When starting a side hustle, balance is the most important thing.
If you are so absorbed in your side hustle that you neglect your main job, your income will decrease.

It may be a good idea to start with the goal of earning $100 per month for the first year as a trial while learning how to file tax returns and learn about taxes.