Dropshipping is frequently presented as a path to passive income with minimal startup costs. The reality is more nuanced. It can be profitable, but only with the right margins, product selection, and ad management. Here is how to evaluate whether your dropshipping setup is viable.
Calculate your exact dropshipping margins with the Dropshipping Calculator.
The Real Math Behind Dropshipping
Most dropshipping tutorials focus on gross profit. The number that matters is net profit after every cost:
- Supplier cost (COGS)
- Shipping from supplier to customer
- Platform fees (Shopify: 2%, Amazon: 15%, eBay: 13%)
- Payment processing: 2.9% + £0.30
- Ad spend per sale (Facebook Ads, Google Shopping, TikTok)
- Returns and refunds (budget 5-10%)
- Monthly overheads (Shopify subscription, apps, email tools)
What Margins Are Realistic?
| Margin Level | Net Profit per Sale | Viability |
|---|---|---|
| 30%+ | Strong | Scalable and resilient |
| 20-30% | Good | Viable with careful ad management |
| 10-20% | Thin | Very sensitive to ad costs and returns |
| Below 10% | Risky | Unsustainable in most niches |
The challenge with dropshipping is that you typically sell commodity products available from multiple suppliers. This limits pricing power. Margins of 15-25% are common, meaning your ad spend must be very efficient.
Ad Spend is the Critical Variable
The profitability of a dropshipping business often comes down to your cost per acquisition (CPA). If your net profit per sale is £8 and your CPA is £7, you are barely profitable and one bad week of ads wipes it out.
Rule of thumb: your CPA should be no more than 50% of your net profit per unit (before ad spend). If your gross profit per unit is £15, aim for a CPA under £7.50.
Use the ROAS Calculator to work out the minimum return on ad spend you need to be profitable.
Break-Even Analysis
Before scaling ad spend, know your break-even:
Break-even units per month = Monthly fixed costs / Net profit per unit
If Shopify plus apps costs £100/month and your net profit per sale (before fixed costs) is £5, you need 20 sales per month to break even. Only profit above 20 units counts as real income.
Common Dropshipping Mistakes
- Choosing low-margin commodity products — if a product is available from 50 other dropshippers, margins compress quickly
- Not accounting for returns — 5-15% return rates are common in clothing, electronics, and home goods
- Ignoring shipping times — products from Chinese suppliers often have 2-4 week delivery times; this drives chargebacks and refund requests
- Underestimating ad learning costs — Facebook Ads typically need 50-100 conversions per ad set to optimise; this is real money spent before you see results
- No sustainable differentiation — dropshipping the exact same product as everyone else is a race to the bottom
What Makes Dropshipping Work
Profitable dropshippers typically have one of:
- Unique product sourcing: private label or exclusive supplier relationships
- Strong brand: a branded Shopify store with a clear audience and high repeat purchase rate
- Niche expertise: a specific audience that trusts their recommendations and pays a premium
- Operational efficiency: very low CPA through SEO, organic social, or existing audience
Model your numbers before investing in ads. Use the Dropshipping Calculator to see your real margins and break-even point.