Free Checklist for Getting Started Selling Online

Understanding the Online Sales Landscape

The online marketplace has grown into a major part of how people buy and sell products and services. According to the U.S. Census Bureau, e-commerce sales reached approximately $1.1 trillion in 2023, representing about 16% of total retail sales. This growth shows that selling online is no longer a niche activity—it's become a standard business approach for millions of sellers worldwide.

Before starting to sell online, it's important to understand what this means. Selling online refers to offering products or services through internet-based platforms, including your own website, social media channels, or third-party marketplaces like Amazon, eBay, or Etsy. Each approach has different requirements, costs, and audiences. Some sellers start with one platform and expand to others as they grow.

The online sales environment includes several key players: platforms that host your storefront, payment processors that handle transactions, shipping and logistics companies, and customers who discover and purchase your items. Understanding how these pieces work together helps you make better decisions about where and how to sell.

Different product types work better on different platforms. For example, handmade items often perform well on Etsy, which had over 7.5 million active sellers in 2023. Bulk electronics and general merchandise tend to succeed on Amazon, which reported over 2 million third-party sellers using its platform. Vintage items, collectibles, and a wide range of products do well on eBay. Social media platforms like Instagram and TikTok work better for building a brand and directing customers to your own store or marketplace listings.

Practical takeaway: Before setting up shop anywhere, spend time researching where your target customers already shop. Look at what competitors are selling and how they're positioned. This research phase costs nothing but saves significant time and money later.

Choosing Your Sales Platform or Channels

Selecting where to sell is one of your most important early decisions. You have several main options: marketplaces (platforms that host many sellers), your own independent website, social media channels, or a combination of these. Each option involves different trade-offs regarding costs, control, visibility, and effort.

Marketplaces like Amazon, eBay, Etsy, and Shopify take a percentage of each sale—typically ranging from 5% to 15% depending on the platform and product category. In exchange, they provide existing customer traffic, built-in payment processing, and established trust systems. For example, Amazon seller fees include a referral fee (typically 8-15% of the sale price), a variable closing fee for media items, and optional monthly subscription fees ($39.99 for a Professional selling plan). These fees add up, but many sellers find the traffic worth the cost.

Building your own website through platforms like Shopify, WordPress with WooCommerce, or BigCommerce gives you more control and typically has lower percentage fees, but you handle your own marketing to bring in customers. Shopify charges around $29-$399 per month depending on the plan, plus payment processing fees of 2.9% plus $0.30 per transaction. You'll need to pay separately for domain names, email marketing, and potentially other tools.

Social media selling through Instagram, Facebook, TikTok Shop, or Pinterest lets you showcase products directly to followers. These platforms charge lower fees but require consistent content creation and audience building. Many successful sellers use social media to drive traffic to their marketplace or independent store rather than trying to complete the full sale on social media itself.

A hybrid approach combines multiple channels. Many sellers start on one marketplace to test products and build experience, then add their own website once they have steady sales, and use social media for marketing across all channels. This spreading of risk means if one platform changes its policies or algorithms, you have other sources of income.

Practical takeaway: Create a simple spreadsheet comparing fees, traffic potential, and time requirements for platforms that match your product type. Calculate what percentage of your sale price will go to fees on each platform. This helps you understand which options are actually profitable for your specific situation.

Setting Up Legal and Tax Requirements

Operating an online business requires attention to legal and tax matters from the beginning, even if you're starting small. The specific requirements depend on your location, business structure, product type, and sales volume. Treating this seriously from the start prevents problems later and can save significant money and headaches.

First, consider your business structure. Most online sellers start as sole proprietors, meaning they operate as individuals without forming a separate legal entity. This is the simplest approach but offers no liability protection—if someone sues your business, they can go after your personal assets. Other options include forming a Limited Liability Company (LLC) or a corporation, which provide liability protection but involve more paperwork and cost. Many small online sellers consult with a business attorney or accountant to determine the best structure for their situation.

You likely need a business license from your local government, though requirements vary significantly by location. Some cities and counties require licenses for any business operation, while others only require them above a certain sales threshold. Contact your local city or county business office to learn what's required in your area. The cost typically ranges from $50 to $500 annually.

Sales tax is a critical consideration. If you sell physical products, you must collect and pay sales tax in states where you have "sales tax nexus." Nexus means you have a significant business presence, which now includes having customers in that state for many sellers due to the 2018 South Dakota v. Wayfair Supreme Court decision. The rules vary considerably by state and product type. You'll need to register for a sales tax permit in applicable states, collect the correct tax at checkout, and file tax returns (usually quarterly or monthly). Many sellers use accounting software like QuickBooks or TaxJar to track this automatically.

Income tax requirements mean you must report all sales revenue as business income. You can deduct legitimate business expenses like inventory costs, platform fees, packaging materials, shipping supplies, website hosting, and a portion of your home office if you work from home. Keep records of all income and expenses. As a general rule, if you earn more than $400 in net profit from self-employment, you must file taxes and pay self-employment tax. Many online sellers work with a tax professional to ensure they're handling this correctly.

Practical takeaway: Before making your first sale, contact your local business licensing office and your state's revenue department to learn what's required. Write down the specific information you need: business license requirements, sales tax nexus rules for your state, and income reporting thresholds. This information costs nothing to obtain but is essential for staying compliant.

Sourcing Products and Managing Inventory

One of the biggest decisions for online sellers is how to source products to sell. Your sourcing strategy directly affects your profit margins, time investment, and the uniqueness of your offerings. There are several main approaches, each with different characteristics.

Retail arbitrage means buying products from retail stores at regular prices and reselling them online for a markup. This requires identifying items that are underpriced relative to their online value, purchasing inventory upfront, and managing stock. The advantage is that products already exist and you're not creating anything new. The disadvantage is thin margins—if you're buying at retail price and selling at only slightly above that, profit margins may be only 10-20% after marketplace fees. This approach works better with higher-value items and requires significant capital upfront.

Wholesale purchasing involves buying products directly from manufacturers or distributors at lower per-unit costs. You'll need to purchase in bulk, sometimes with minimum order quantities of 100 units or more. This significantly lowers your per-item cost, allowing better profit margins. The challenge is capital investment—you might spend $2,000 to $5,000 or more on initial inventory. Many sellers use platforms like Alibaba or Global Sources to find wholesale suppliers, though you must verify that suppliers are legitimate and products meet quality standards.

Creating your own products offers the highest profit potential and uniqueness. This includes handmade items (jewelry, art, woodwork), digital products (templates, courses, music), print-on-demand items (t-shirts, mugs with custom designs), or dropshipping (ordering items one at a time from a supplier who ships directly to customers). Handmade and digital products require your time investment upfront but minimal inventory costs. Print-on-demand and dropshipping require no upfront inventory but typically have lower profit margins per item.

Inventory management is crucial for avoiding tied-up capital and warehouse costs. Successful sellers monitor which products sell quickly and which