Building an ecommerce site comes down to five core decisions: choosing a platform, setting up your storefront, connecting a payment processor, planning how orders get fulfilled, and launching with the technical basics in place. You can have a functional online store live within a few days if you use a hosted platform, or a few weeks if you build on an open-source tool. Here’s how to work through each step.
Choose Your Platform
Your platform is the foundation everything else sits on. The three most popular options fall into two categories: hosted platforms where the company handles your servers, security, and updates for a monthly fee, and self-hosted platforms where you run the software on your own web hosting.
Shopify is the most beginner-friendly hosted option. It uses a drag-and-drop interface, bundles hosting and security into your subscription, and offers thousands of apps to extend functionality. The tradeoff is limited deep customization without coding knowledge, and those apps often carry their own monthly fees that add up. Shopify’s ecommerce plans start at $39 per month.
BigCommerce is a hosted platform built for stores that expect to grow quickly. It includes more advanced features out of the box than Shopify, like robust SEO tools and no transaction fees on any plan. The interface is slightly more complex, and pricing tiers increase as your revenue grows. Monthly plans are comparable to Shopify’s.
WooCommerce is a free plugin that turns a WordPress website into a full online store. It gives you complete control over every aspect of your site, which makes it a favorite among developers and people who want maximum flexibility. The core plugin costs nothing, but you’ll pay separately for web hosting, a theme, and any premium plugins you need. It also requires a steeper learning curve and more hands-on maintenance. Hosting alone typically runs $10 to $50 per month depending on the provider and plan.
If you want to open your store quickly and don’t have a technical background, a hosted platform like Shopify or BigCommerce is the faster path. If you already know WordPress or want granular control over your site’s code and design, WooCommerce offers more flexibility for the long run.
Register a Domain and Configure Hosting
Your domain name is your store’s address on the web. Keep it short, easy to spell, and relevant to what you sell. Domain registration typically costs $10 to $20 per year through registrars like Namecheap, Google Domains, or directly through your platform. Some hosting plans include a free domain for the first year.
If you’re using Shopify or BigCommerce, hosting is already included in your subscription. If you’re using WooCommerce, you’ll need to purchase a hosting plan separately and install WordPress before adding the WooCommerce plugin. Look for a host that includes an SSL certificate, which encrypts data between your site and your customers’ browsers. Most modern hosts bundle SSL at no extra charge. Without it, browsers will flag your site as “not secure,” and customers will leave before they ever see your products.
Design Your Storefront
Every platform offers pre-built themes you can customize with your branding, colors, and logo. Free themes work fine for launching. Premium themes, which typically cost $50 to $250 as a one-time purchase, often include more layout options and design polish.
Focus your early design effort on three pages that do the most work: your homepage, your product pages, and your checkout flow. Product pages need clear photos (multiple angles, shot against a clean background), a concise description that answers the buyer’s most likely questions, the price, and a prominent “Add to Cart” button. Avoid walls of text. Bullet points work well for specs, dimensions, and materials.
Mobile responsiveness is not optional. Over 60% of web traffic comes from phones and tablets. Test every page on a phone screen before you launch. Check that fonts are readable without zooming, buttons are large enough to tap with a thumb, and images don’t push content off-screen. Most modern themes handle this automatically, but you should still preview and adjust spacing, font sizes, and column layouts for smaller screens. If a design element only makes sense on a desktop monitor, hide it on mobile to reduce clutter.
Set Up Payment Processing
Your payment processor is the service that accepts credit cards and transfers money to your bank account. Every transaction costs a small percentage plus a flat fee, so choosing the right processor affects your margins on every sale.
For online transactions, the most common fee structures look like this:
- Stripe: 2.9% + $0.30 per transaction, no monthly fee
- Square: 3.3% + $0.30 per transaction, no monthly fee on the free plan
- Shopify Payments: 2.9% + $0.30 per transaction on the basic plan (included with Shopify subscriptions)
On a $50 sale, a 2.9% + $0.30 fee means you pay about $1.75 to the processor. On 500 sales a month at that average, that’s roughly $875 in processing fees. If you’re using Shopify, its built-in payment gateway avoids the extra transaction fee Shopify charges when you use a third-party processor.
For higher-volume stores, interchange-plus processors like Helcim can be cheaper. Helcim charges 0.5% + $0.25 on top of the interchange rate (the base fee set by card networks), with no monthly subscription. The savings become meaningful once you’re processing thousands of dollars per month. Stripe and Square are simpler to set up and perfectly fine for stores just getting started.
Decide How You’ll Fulfill Orders
Fulfillment is how products get from a shelf into a customer’s hands. You have three main options, and the right one depends on your budget, product type, and order volume.
Self-fulfillment means you store inventory yourself and pack and ship each order. This gives you the most control over packaging, quality checks, and shipping speed. It’s cost-effective when you’re doing a handful of orders per day, but it doesn’t scale well. You’re responsible for buying packing materials, negotiating carrier rates, and physically getting to the post office or scheduling pickups.
Dropshipping means you never touch the product at all. When a customer buys from your store, you forward that order to a manufacturer or wholesale partner, and they ship it directly to the customer. You don’t pay for inventory upfront and you don’t need warehouse space, which makes startup costs very low. The downsides are thinner profit margins, less control over product quality and shipping times, and no ability to customize packaging. This model works well for testing product ideas or entering a market without a large upfront investment.
Third-party logistics (3PL) is a middle ground. You purchase inventory and send it in bulk to a 3PL warehouse. When orders come in, the 3PL picks, packs, and ships them on your behalf. They track inventory levels, handle returns, and use their carrier relationships to negotiate better shipping rates than you’d get on your own. You pay for the warehouse space and per-order fulfillment fees, but you can scale up or down as demand changes. 3PLs make sense once you’re doing consistent volume and want to free up your time without giving up control over your product.
Configure Shipping and Tax Settings
Before launch, you need to set shipping rates and sales tax collection inside your platform’s settings. For shipping, you can offer flat-rate shipping (a single price regardless of order size), free shipping with a minimum order threshold, or real-time carrier rates that calculate the exact cost based on package weight and destination. Free shipping above a certain dollar amount, like $50 or $75, is one of the most effective ways to increase average order size.
Sales tax rules vary by state, and most ecommerce platforms can automatically calculate and collect the correct tax based on the customer’s shipping address. You’ll need to register for a sales tax permit in states where you have a tax obligation, which generally applies in states where you have a physical presence or exceed a certain sales threshold. Your platform’s tax settings will walk you through enabling automatic collection.
Test Everything Before Launch
Place a test order yourself before you open to real customers. Walk through the entire experience: browse a product, add it to the cart, enter a shipping address, and complete checkout. Most platforms have a test mode or sandbox for payment processing so you don’t actually charge yourself. Verify that order confirmation emails arrive, that the correct shipping rate appears, and that tax calculates properly.
Check your site speed. Slow-loading pages kill conversions. Compress product images before uploading them (tools like TinyPNG do this for free) and avoid loading unnecessary scripts or apps that add bloat. Run your URL through Google’s PageSpeed Insights to see where you stand.
Set up Google Analytics or your platform’s built-in analytics before launch so you start collecting visitor data from day one. You’ll want to know where your traffic comes from, which products people view most, and where in the checkout process buyers drop off. This data shapes every decision you make after launch, from which products to promote to where your site needs improvement.
What It Costs to Get Started
A basic ecommerce store on a hosted platform like Shopify costs roughly $40 to $80 per month between the subscription, a domain, and one or two essential apps. WooCommerce can start cheaper at $15 to $40 per month for hosting and a domain, but premium themes and plugins often bring the total to a similar range. Payment processing fees are a percentage of every sale regardless of platform.
Beyond the platform itself, your main startup costs are inventory (unless you’re dropshipping), product photography, and any paid marketing you run to drive initial traffic. Many successful stores launch for under $500 in total upfront costs by starting with a free theme, a small initial inventory run, and organic marketing through social media and search engine optimization.