The Dropshipping Profit Formula
Dropshipping profit is not as simple as "sell for more than you buy for." The real formula accounts for product cost, shipping, platform fees, payment processing, advertising, refunds, and taxes.
Core formula: Profit = Selling Price - Product Cost - Shipping Cost - Platform Fees - Payment Processing - Ad Spend - Refund Reserve - Taxes.
A product that costs $10 and sells for $30 is not a $20 profit. After shipping ($3), platform fees ($3.90), payment processing ($0.90), ads ($5-10), and refund reserve ($1.50), your real profit is $1.70-6.70 — a 5.7-22.3% margin, not 66.7%.
Use our Dropshipping Profit Calculator and Dropshipping ROAS Calculator to model your exact margins.
Platform Fees Breakdown
Shopify: Basic plan $39/month + 2.9% + $0.30 payment processing. Transaction fee for 3rd-party gateways: 0.5-2%. For a $30 sale: $0.87 + $0.30 = $1.17 in processing.
Amazon FBA: Referral fee (15% for most categories) + FBA fulfillment fee ($3-6 per unit). For a $30 item: $4.50 referral + $4.50 FBA = $9.00 — a 30% cut before you see a dime.
eBay: Final value fee 13.25% + $0.30 per order. For a $30 sale: $3.98 + $0.30 = $4.28.
Etsy: Transaction fee 6.5% + payment processing 3% + $0.25 + $0.20 regulatory. For a $30 sale: $1.95 + $0.90 + $0.25 + $0.20 = $3.30.
Break-Even ROAS: The Number That Matters
Break-even ROAS is the maximum you can spend on ads and still make zero profit. Above this number, you lose money on every sale. Below it, every dollar of ad spend generates profit.
Formula: Break-Even ROAS = Selling Price / Profit Margin. If your product sells for $30 and your net profit before ad spend is $15, your break-even ROAS is $30/$15 = 2.0x.
This means if you spend more than $15 on ads to acquire a customer, you lose money. If you spend $10, you make $5 profit. Most successful dropshippers target a ROAS of 3-5x for sustainable profitability.
Hidden Costs That Kill Margins
Refunds and chargebacks: Plan for 5-15% refund rates depending on product quality and customer expectations. A $1.50 refund reserve per $30 order is conservative.
Ad account spending: Facebook and Google often require $50-200 in testing spend before finding winning ads. This is a sunk cost that eats into early profits.
Chargeback fees: PayPal and Stripe charge $15-25 per chargeback, plus you lose the product and the sale. Keep chargeback rates below 1% to avoid account suspension.
Currency conversion: If your supplier is in China (most are), you lose 2-3% on currency conversion through your payment processor.
Profit Scenarios by Product Category
Fashion and accessories: Low product cost ($5-15), high perceived value ($30-80), good margins (15-25%). High return rates (20-30%) can erode profits.
Home and kitchen: Moderate cost ($10-25), moderate price ($30-70), solid margins (12-20%). Lower return rates (5-10%). Best category for beginners.
Electronics: High cost ($20-100), competitive pricing pressure, thin margins (5-12%). High competition and expensive customer support.
Beauty and health: Low cost ($3-10), good margins (20-35%), repeat purchases. But regulatory requirements and high ad competition in this space.
- Real profit is 5-25% after all costs, not 66%+ as advertised
- Break-even ROAS is the most important metric for ad profitability
- Plan for 5-15% refund rates in your margin calculations
- Home and kitchen products offer the best risk/reward for beginners
Frequently Asked Questions
What is a good profit margin for dropshipping?
A healthy dropshipping margin is 15-25% after all costs. Margins below 10% are risky because one bad month of refunds or ad costs can wipe out profits. Margins above 30% are possible but require premium products and strong branding.
How do I calculate break-even ROAS?
Break-even ROAS = Selling Price / Profit Margin (before ad spend). If your product sells for $50 and net profit before ads is $20, break-even ROAS is 2.5x. You need ROAS above 2.5x to be profitable.
What percentage should I budget for advertising?
Most successful dropshippers spend 20-30% of revenue on advertising. If you sell $10,000/month, budget $2,000-3,000 for ads. Spending more than 35% of revenue on ads usually indicates a product-market fit problem.