Online Side Hustle: 30+ Ideas

An online side hustle is a flexible way to generate extra income online alongside your regular job. More and more Dutch and Belgian people are combining their full-time job with a digital side income - and that's not surprising. The possibilities are greater than ever, the threshold is low, and you can start without major investments. In this comprehensive guide, we'll discuss over 30 proven online side hustle ideas for 2026, including realistic earnings, difficulty level, and concrete tips to get started.

Why start an online side hustle in 2026?

The cost of living is rising, but average salaries aren't growing as quickly. An online side hustle offers a solution: you build extra income without giving up your full-time job. According to recent figures from the CBS, 1 in 7 Dutch people now have some form of side income. The benefits are numerous:

• Flexibility - work when it suits you: in the evenings, on weekends, or during your lunch break
• Low start-up costs - most side hustles require less than €100 in initial investment
• Location independence - work from home, a café, or while on vacation
• Scalability - start small and grow into a full-fledged business if you want
• Developing skills - you learn entrepreneurship, marketing, and financial management
• Financial buffer - extra income provides more security in case of unexpected expenses

Online side hustle comparison table: the best options at a glance

Below, you'll find an overview of the most popular online side hustle opportunities, with an honest estimate of what you can expect.

Side Hustle	Difficulty	Start-up costs	First income after	Potential/month
Selling on bol.com	Average	€50 – €500	2 – 4 weeks	€500 – €10.000+
Dropshipping	Average	€100 – €300	1 – 3 months	€300 – €5.000+
Freelance writing	Low	€0	1 – 4 weeks	€500 – €4.000+
Affiliate marketing	Low	€0 – €50	2 – 6 months	€100 – €3.000+
Virtual assistant	Low	€0	1 – 2 weeks	€800 – €3.000+
Creating online courses	High	€50 – €200	3 – 6 months	€200 – €10.000+
Print on demand	Average	€0 – €100	1 – 3 months	€200 – €3.000+
Social media management	Average	€0 – €50	2 – 4 weeks	€1.000 – €5.000+
YouTube channel	High	€100 – €500	6 – 12 months	€100 – €5.000+
Online surveys	Very low	€0	Immediate	€20 – €100

E-commerce as an online side hustle

E-commerce is one of the most profitable categories for an online side hustle. You can sell products without a physical store and reach millions of potential customers directly.

1. Selling on bol.com

With over 13 million active customers, bol.com is the largest online sales platform in the Benelux. As a partner, you can offer products to this huge audience. The commission varies per category (5%–17%). Use the Boloo Product Tracker to identify profitable products and the Sales Dashboard to track your sales. Many sellers start with a few products alongside their job and gradually scale up.

2. Dropshipping

In dropshipping, you sell products without inventory. Your supplier ships the product directly to your customer. This model is ideal as a side hustle because it requires little start-up capital. You can start dropshipping via bol.com or set up your own Shopify store. Note the lower margins and longer delivery times.

3. Print on demand

Design custom products (t-shirts, mugs, posters, phone cases) and have them produced and shipped by a partner after each order. No inventory risk, ideal as a creative side hustle. The margins range from 15% to 30%.

4. Selling digital products

E-books, templates, spreadsheets, Canva designs, Lightroom presets - you create them once and sell them unlimitedly. The profit margin is almost 100% because there are no production costs per sale. Platforms: Gumroad, Etsy, your own website.

5. Your own webshop

With Shopify, WooCommerce, or Magento, you set up a professional webshop. You have full control over your brand, prices, and customer relationships. The downside: you have to generate traffic yourself through SEO and advertising.

6. Selling on multiple marketplaces

In addition to bol.com, you can sell on Amazon, Etsy, Marktplaats, and Vinted. By being active on multiple platforms, you increase your reach. Use the Boloo Product Database to find promising niches.

7. Selling handmade products

Are you creative? Sell handmade jewelry, art, candles, or decorations via Etsy or your own webshop. The margins are high, and customers pay a premium for unique products.

Freelancing and services as a side hustle

If you have specific skills, you can use them directly as an online side hustle. Freelancing offers quick income without large investments.

8. Freelance writing

Companies are constantly looking for blog posts, website content, and product descriptions. Earnings: €0.05–€0.25 per word. Platforms: Upwork, Fiverr, Freelancer.nl. You can start right away with a portfolio of writing samples.

9. Virtual assistant

Help entrepreneurs with email management, planning, customer service, and social media. No start-up costs, hourly rates of €15–€50. Ideal if you're organized and want to work from home.

10. Graphic design

Using tools like Canva, Figma, or Adobe Illustrator, you create logos, social media visuals, and packaging designs. Hourly rates: €25–€75, depending on specialization and experience.

11. Web development

Building websites for small businesses is a lucrative side hustle. A simple website can earn you €500–€3,000. With WordPress knowledge, you can get started quickly.

12. Online coaching and consulting

Expertise in a particular field? Offer online coaching or consulting sessions. Hourly rates of €75–€250. Platforms: Calendly for scheduling, Zoom for sessions.

13. SEO consultancy

Help businesses rank higher in Google. SEO consultants earn €50–€100 per hour. The Boloo Keyword Verkenner can help you with keyword research for clients.

14. Translation work

Do you speak multiple languages? Translation work is an excellent side hustle. Rates vary from €0.08–€0.15 per word. With specialization in legal or medical translation, rates are higher.

15. Bookkeeping and administration

Small entrepreneurs often need help with their bookkeeping. With knowledge of tools like automatic invoicing and accounting software, you can offer this as a side hustle.

Content creation and social media

16. YouTube channel

YouTube pays €1–€5 per 1,000 views via the partner program. Additionally, you earn money through sponsor deals and affiliate links. Requirements: 1,000 subscribers and 4,000 watch hours per year for monetization.

17. Blogging

A blog generates income through advertisements (AdSense), affiliate marketing, sponsored posts, and own products. Successful bloggers earn €500–€5,000+ per month. The key: consistently publishing valuable content.

18. Podcasting

Podcasts are monetized through sponsor deals, Patreon, premium content, and affiliate links. In 2025, 35% of the Dutch regularly listened to podcasts - a growing market.

19. Social media management

Manage social media accounts for businesses: create content, plan posts, respond to messages, and analyze results. Monthly retainers of €300–€1,500 per client. With Boloo E-mail Campagnes, you can also offer email marketing.

20. TikTok and Instagram Reels

Short video content is booming. With creative, valuable videos, you build an audience. Revenue models: Creator Fund, brand collaborations, affiliate marketing. Micro-influencers (5,000–50,000 followers) earn €100–€500 per sponsored post.

21. Stock photography and video

Upload photos and videos to Shutterstock, Adobe Stock, or Getty. Per download, you receive €0.25–€5.00. With a large portfolio, this generates decent passive income.

Education and knowledge sharing as an online side hustle

22. Creating online courses

Platforms like Udemy, Teachable, and Skillshare make it easy to sell your knowledge. Popular topics: programming, marketing, photography, e-commerce. Also, check out the Boloo courses on selling on bol.com. Earnings: €500–€10,000+ per month.

23. Online tutoring

Help students with math, languages, or other subjects. Platforms: Bijles.nl, Superprof, Preply. Hourly rates: €15–€50 depending on subject and level.

24. Writing e-books

Self-publishing via Amazon KDP or Bol.com. Royalties: 35%–70% of the selling price. A good e-book can generate passive income for years.

25. Webinars and workshops

Organize paid online workshops or webinars about your area of expertise. With platforms like Zoom and Eventbrite, you reach a wide audience. Tickets from €25–€200 per participant.

Passive income and investments

26. Affiliate marketing

Promote products from other companies and receive a commission per sale. Popular networks: bol.com Partnerprogramma, Amazon Associates, Tradetracker. Earnings: €100–€3,000+ per month with a well-built website.

27. Building niche websites

Build websites around specific topics, monetize them with advertisements and affiliate links, and sell them eventually. An established niche site generates €200–€2,000+ per month.

28. App development

Develop an app and earn money through downloads, in-app purchases, or subscriptions. A successful app can generate thousands of euros in passive income per month.

29. Online surveys and microtasks

Platforms like Swagbucks, Toluna, and GfK offer rewards for surveys. The earnings are limited (€1–€5 per hour), but it's low-threshold and suitable as a supplement.

30. Trading domain names

Buy potentially valuable domain names and sell them for a profit. Successful domain traders can earn hundreds to thousands of euros per transaction.

31. SaaS tools and digital services

Build a software tool that solves a specific problem. Think of a budget planner, project management tool, or niche-specific software. Subscription models generate recurring income.

How to choose the right online side hustle?

The ideal side hustle depends on your personal situation. Ask yourself these questions:

• How much time do you have available? - 5 hours a week or 20 hours?
• What is your starting budget? - Some side hustles require an investment, others don't
• What skills do you have? - Writing, designing, programming, or commercial talent?
• Are you looking for active or passive income? - Freelancing is active, affiliate marketing can be passive
• How much risk can you take? - E-commerce with inventory vs. services without risk
• What is your long-term goal? - Supplemental income or eventually full-time entrepreneurship?

Step-by-step plan: starting your online side hustle

1. Choose one side hustle - Focus is essential. Don't try to do five things at once
2. Conduct market research - Analyze the competition and the revenue model. The Boloo Product Database helps with e-commerce choices
3. Start with an MVP - Test your idea with minimal investment before scaling up
4. Build an online presence - A simple website or social media profile is enough to get started
5. Register with the KvK - Once you generate structural income, this is legally required
6. Keep track of your finances - Use the Boloo Winstcalculator to calculate margins and profits
7. Scale up gradually - Invest your profits back into growth, marketing, and optimization

Common mistakes in online side hustles

• Giving up too quickly - Most side hustles take 2–6 months to generate structural income
• Trying to do too much at once - Focus on one thing and become good at it before diversifying
• Not keeping administration - Don't forget to register income and expenses for tax purposes
• Having unrealistic expectations - A side hustle is not a 'get rich quick' scheme
• Not marketing - Even the best product won't sell without visibility
• No KvK registration - With structural income, you are required to register

Taxes and legal matters

If you structurally earn money with your online side hustle, you must report this to the tax authorities. Important points to consider:

• With more than €800 per year: registration with the KvK as a sole proprietorship
• VAT return is mandatory with structural turnover (unless small business scheme)
• Keep all receipts, invoices, and bank statements
• Consider automatic invoicing to simplify your administration
• Discuss your situation with an accountant, especially with higher income

Frequently asked questions about online side hustles

How much can you earn with an online side hustle?

This varies greatly: from €20–€100 per month (surveys) to €5,000+ (successful e-commerce or freelancing). Most beginners earn €200–€1,000 per month in the first 6 months.

Can I combine a side hustle with a full-time job?

Yes, that's the idea. Choose a side hustle that fits your available time. 5–10 hours per week is enough for many options. Just check your employment contract for any restrictions.

Do I need a KvK number for my side hustle?

As soon as you earn money structurally and with a profit motive, you need to be registered with the KvK. For hobby activities under €800 per year, this usually doesn't apply.

What's the fastest online side hustle to get started with?

Freelancing (writing, VA, design) and selling on existing marketplaces like bol.com are the fastest. You can generate your first income within 1–2 weeks.

Can I start without start-up capital?

Absolutely. Freelancing, affiliate marketing, blogging, YouTube, and online tutoring require little to no start-up investment. You mainly invest your time and skills.

Is an online side hustle worth it?

For most people: yes. Besides extra income, you build valuable skills in entrepreneurship, marketing, and financial management that enrich your career - regardless of whether your side hustle grows into a full-time business.