Attributed revenue is not the same as incremental profit. Marketing investment needs an economic thesis, a funding plan and evidence of customer value.
What remains from a VND 500,000 order?
| Order layer | VND per order |
|---|---|
| Revenue after 15% promotion | 500,000 |
| Platform fixed fee · 14% | (70,000) |
| Service fee · rounded to 0.3% | (1,500) |
| Transaction processing · 6% | (30,000) |
| Settlement after platform fees | 398,500 |
| Assumed COGS · 35% | (175,000) |
| Contribution before Ads and Affiliate | 223,500 · 44.7% |
| Assumed Ads · 8–10% | (40,000–50,000) |
| After Ads, before Affiliate and omitted costs | 173,500–183,500 · 34.7–36.7% |
All percentages use post-promotion product revenue, on an assumed consistent tax basis. The 15% promotion is already in the selling price: do not deduct it again. Net shipping cost is zero in the supplied settlement because a VND 56,800 charge was fully offset by an equal subsidy. That does not establish free shipping for every order.
Evidence: supplied settlement and modelling assumptions
| Settlement line | VND |
|---|---|
| Product amount after promotion | 938,818 |
| Shipping charge | (56,800) |
| Shipping subsidy | 56,800 |
| Fixed fee | (131,435) |
| Service fee | (3,000) |
| Transaction processing | (56,329) |
| Total fee deductions | (190,764) |
| Settlement receipt | 748,054 |
The settlement is user-supplied evidence, not independently audited. The VND 500,000 model scales and rounds its observed fees; 35% COGS and 8–10% Ads are assumptions. Affiliate is now assumed at 10% of net revenue for the illustrative orders; this is not a rate verified from the bill. The VND 3,000 service fee may be a per-order charge; its basis must be confirmed before using the scaled VND 1,500 for decisions. These are not a current or universal platform fee schedule.
| After Affiliate: the updated scenario | VND per order |
|---|---|
| Before Ads and Affiliate · 44.7% | 223,500 |
| Assumed Affiliate · 10% | (50,000) |
| Before Ads, after Affiliate · 34.7% | 173,500 |
| Ads · 8–10% | (40,000–50,000) |
| After Ads and Affiliate · 24.7–26.7% | 123,500–133,500 |
This scenario assumes the order incurs both Ads and Affiliate. Where only some orders incur Affiliate, use the actual commission-bearing revenue and the resulting effective rate, rather than charging 10% to every order.
01Business Reality
An advertising dashboard can show strong sales while the business struggles to recover acquisition spending. Some attributed orders would have occurred anyway; others come from discount-sensitive customers who never return.
Frame the outline around a hypothetical request to expand marketing spend. Separate the objective of acquiring new customers from harvesting existing demand or protecting brand visibility.
02Financial Mechanics
ROAS divides attributed revenue by ad spend. A simplified break-even ROAS is one divided by contribution margin before ads, provided the revenue is net, incremental and measured consistently. This threshold does not cover fixed costs or establish causality.
Evaluate customer lifetime contribution after retention costs, CAC and the timing of cash recovery. Use cohort evidence and sensitivity ranges rather than treating projected lifetime revenue as profit.
03Decision Trade-offs
Reducing spend may improve near-term earnings while weakening future demand. Increasing spend can accelerate learning but consume cash before repeat contribution is demonstrated. Average campaign efficiency can conceal poor marginal performance.
Compare budget increments, channels, audiences and retention investments. Discuss the trade-off between learning speed, attribution confidence and the amount of capital at risk.
04CFO Perspective
Ask what changes because of the next budget increment and what evidence supports the answer. Distinguish attribution from incrementality and require realistic assumptions for returns, discounts and repeat purchase.
Agree with commercial teams on payback tolerance and liquidity constraints. Avoid imposing a universal payback period regardless of product economics, strategy or funding capacity.
05Practical Framework
Write an investment hypothesis for each campaign: audience, incremental contribution, CAC, cohort behavior and expected cash payback. Use a suitable holdout or controlled test when feasible, acknowledging contamination and sample limits.
Release spend in stages. Review marginal contribution, cohort cash recovery and evidence quality; set explicit rules to scale, revise or stop rather than relying on revenue growth alone.
The settlement was supplied for this editorial case; identifying details are excluded. Modelled COGS, Ads, Affiliate scenarios and thresholds are assumptions. This is an incomplete contribution model until omitted costs are added.
Back to E-commerce ↗