Can the order afford paid acquisition?
A supplier listing price is the beginning, not the end, of a dropshipping calculation. Delivery, payment costs, expected losses, advertising and recurring operating expenses can erase the apparent gap between retail and supplier price.
This is an original hypothetical scenario, not a supplier quote or a claim about typical margins. It follows one order from customer payment to the amount remaining after stated costs. The aim is to make assumptions visible before paying for traffic.
Build an order cost card
Assume the customer pays $40 including delivery. Processing is an illustrative 2.9% plus $0.30, or $1.46. Amounts use USD; collected sales tax and income tax are excluded.
| Input | Dollars per original order |
|---|---|
| Customer revenue | 40.00 |
| Supplier product | 14.00 |
| Supplier delivery | 5.00 |
| Processing | 1.46 |
| Expected refund-loss allowance | 2.00 |
| Separate replacement-loss allowance | 0.50 |
| Other variable operating cost | 1.50 |
| Fixed operating allocation | 1.50 |
| Total non-ad costs | 25.96 |
| Available for acquisition and profit | 14.04 |
Refund and replacement allowances must refer to distinct losses. If replacement costs are already in the refund-loss model, adding them again double counts. A percentage reserve is a shortcut to refine when actual outcome data becomes available.
Put acquisition cost next to profit
CPA is spend divided by attributed purchases using a consistent definition and period. A paid click is not a purchase. A calculator visit is not automatically an affiliate sale.
| Acquisition cost | Modeled profit per order | Margin |
|---|---|---|
| $8.00 | $6.04 | 15.10% |
| $12.00 | $2.04 | 5.10% |
| $16.00 | −$1.96 | −4.90% |
The break-even allowance is $14.04, with break-even ROAS of $40 ÷ $14.04 = 2.85×. Keeping $4 profit lowers the allowable CPA to $10.04 and requires approximately 3.98× ROAS. Break-even is not an attractive positive-profit target.
Compare delivered totals
Supplier A charges $14 for the item and $5 for delivery, or $19 combined. Supplier B advertises a $12 item but charges $8 delivery, or $20 combined. The lower listing price has made the delivered item $1 more expensive.
Confirm destination coverage, processing time, tracking, return responsibility, quality and platform restrictions separately. Those details need supplier evidence; this guide assigns no invented reliability advantage to either example.
A supplier subscription is another expense. If it is inside the $1.50 overhead allocation, do not subtract the entire subscription again from each order. When a promotional price expires, test the ordinary price before assuming the product stays profitable.
Stress-test a failure case
If delivery rises by $2 and expected refund/replacement losses rise by $1.50, profit at the same $8 CPA falls from $6.04 to $2.54. A $4 price discount would cause another change; recalculate percentage fees and revenue-linked losses rather than blindly subtracting $4 from the old result.
Prepare a base case and downside case. Mark each input as a quote, an observed value or an estimate. The most uncertain costs deserve the most attention. More decimal places are not a substitute for evidence.
Fixed allocation depends on volume
The $1.50 overhead allocation could represent $150 across 100 orders. If only 25 arrive, fixed cost becomes $6 per order. The original $8-CPA case would then leave $1.54 profit per order after allocation.
Unit and monthly economics must agree. Do not subtract the $150 again from a total already based on fully allocated order profit. Alternatively, exclude overhead from unit contribution and deduct it once at the monthly level.
Use the Dropshipping calculator for one coherent cost set, the returns guide for expected loss, and Product Pricing for a target price. A positive scenario does not validate demand, compliance, supplier performance or future conversion rates. Expansion requires delivered-order evidence, not only revenue screenshots.
Replace the example assumptions with your own costs. Check field definitions before comparing results.