E-commerce TCO over 5 years is typically 3-5x the initial build cost
Catalog size determines hosting requirements, search indexing costs, and platform tier. Stores over 10k products typically need dedicated infrastructure.
Platform choice locks in your cost structure for years. SaaS means predictable fees; open-source shifts costs to hosting, plugins, and developer time.
SaaS platforms (Shopify, Shoper) trade flexibility for lower maintenance overhead. Self-hosted (WooCommerce, PrestaShop) saves on licensing but adds hosting, update, and security costs.
Plugin costs are frequently underestimated. The average WooCommerce store uses 15–25 plugins; premium licenses add up to 3,000–8,000 PLN/year before any custom development.
Average WooCommerce store uses 15–25 plugins. Premium plugin licenses average 200–600 PLN/year each — and most renew annually at 30–50% of the original price.
Hours of custom development work per year
Marketing tools typically account for 15–25% of annual e-commerce TCO. Email automation alone can generate 30–40% of revenue for mature stores — the right tool pays for itself.
Advanced platforms (Klaviyo, ActiveCampaign) add behavioral segmentation and cart abandonment flows that basic tools lack — stores switching report 20–40% higher email revenue.
A single security breach costs an average of 200,000 PLN in lost sales, fines, and recovery. Regular maintenance is cheap insurance compared to incident response.
DIY maintenance saves money but requires 5–10 h/month of technical work. Most store owners underestimate this time investment — and a missed security update can be far more costly.
Shipping integration costs are often overlooked. Multi-courier setups (InPost + DPD + courier) require middleware that costs 100-500 PLN/month plus ongoing maintenance.
Each marketplace integration adds annual licensing costs (500-3,000 PLN/yr) plus ongoing maintenance for API changes, product mapping, and order synchronization.
EU e-commerce regulations (Omnibus Directive, DSA, GDPR) carry significant fines. Omnibus alone requires price history tracking, verified reviews, and transparent promotions — violations start at €20,000.
E-commerce TCO over 3 years is typically 3-5x the Year 1 cost. SaaS costs scale linearly with volume, while custom development front-loads costs but scales better long-term.
Growth affects transaction-based costs (payment processing, marketplace fees). Conservative: 10-15%. Moderate: 20-30%. Aggressive: 30-50%.
Payment processing fees (1.5-3%) are often the largest hidden cost in e-commerce
At higher volumes, payment providers offer negotiated rates. Stores processing over 200k PLN/month can typically negotiate 0.3–0.5 pp lower fees — worth 6,000–12,000 PLN/year in savings.