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CM1, CM2, CM3: The Contribution Margin Math That Quietly Kills Consumer Brand Rounds in Diligence
Rounds stall in diligence when CM2 turns out to be 18%, not the 32% in the deck. How investors calculate CM1, CM2 and CM3, the benchmarks they use, and the seven errors that cause the gap.
Published 27 September 20267 min read
The short answer
CM1 is net revenue minus landed product cost. CM2 subtracts every variable cost of fulfilling the order, including shipping, payment fees, returns, RTO and marketplace fees. CM3 subtracts marketing. Investors decide on CM2 by channel, check CM3 for the path to profit, and rebuild all three from your raw data. For a D2C-led brand in 2026, CM2 of 25% to 40% is healthy; below 15% is hard to fund.
Who this is for: D2C and omnichannel consumer brands preparing an MIS, model or data room for a seed, pre-Series A or Series A raise.
Summary: what most founders miss
- Investors start from net revenue: after discounts, after GST, after returns. Starting from MRP or GMV inflates every margin that follows.
- RTO on cash-on-delivery orders is the single most common cost missing from Indian CM2 calculations.
- Marketplace ad spend and platform visibility fees belong in CM3, and marketplace commissions and fees belong in CM2. Leaving either out is spotted in the first diligence call.
- CM2 must be shown by channel. A blended 28% can hide a D2C channel at 35% and a quick commerce channel at 9%.
- CAC payback is calculated on CM2, not on revenue. A 3x ROAS can still mean an 8-month payback.
Almost every consumer deck in India has a contribution margin slide. Almost every one of them is calculated differently. That is not a problem until diligence, when an analyst rebuilds your numbers from order-level exports and the CM2 in the deck turns out to be 10 to 15 points higher than the CM2 in the data. At that moment, the conversation is no longer about your brand. It is about whether the founders know their business.
This article sets out the definitions investors actually use, the benchmarks for 2026, a full worked example, and the seven errors that cause the gap.
What are CM1, CM2 and CM3?
| Layer | Formula | What it tells an investor |
|---|---|---|
| Net revenue | MRP value − discounts − GST − returns and cancellations | What you actually earned |
| CM1 | Net revenue − landed product cost (COGS incl. packaging, inbound freight) | Is the product priced right? |
| CM2 | CM1 − fulfilment (outbound shipping, pick-pack, warehousing) − payment gateway and COD fees − RTO and return costs − marketplace commission and fees | Does each order make money before marketing? |
| CM3 | CM2 − all marketing (performance ads, marketplace ads, influencers, discounts funded by the brand if not already netted) | Does growth make money today? |
| EBITDA | CM3 − fixed costs (team, rent, tech, overheads) | Does the company make money? |
What CM2 do investors expect in 2026?
| Category | Gross margin (CM1) | CM2, own website | CM2, marketplaces | CM2, quick commerce |
|---|---|---|---|---|
| Beauty and personal care | 65% to 75% | 35% to 45% | 25% to 35% | 18% to 28% |
| Food and snacks | 40% to 55% | 22% to 32% | 12% to 22% | 10% to 20% |
| Health and supplements | 60% to 72% | 32% to 42% | 22% to 32% | 18% to 26% |
| Home and personal care consumables | 45% to 60% | 25% to 35% | 15% to 25% | 12% to 22% |
| Apparel and accessories | 55% to 65% | 25% to 35% (return-heavy) | 15% to 25% | Rarely material |
Swipe the table sideways to see all columns.
Indicative ranges for brands at ₹10 Cr to ₹50 Cr annual revenue. Your own category, price point and AOV will move these. Use them to check whether your number is plausible, not to set targets.
A worked example: one ₹1,000 order on your own website
Here is how an investor builds the unit economics of a single order. The brand sells a ₹1,000 MRP skincare combo.
| Line | ₹ per order | Note |
|---|---|---|
| MRP | 1,000 | |
| Discount (15% site-wide code) | −150 | |
| Selling price, incl. GST | 850 | |
| GST at 18% (included in price) | −130 | 850 × 18/118 |
| Net revenue before returns | 720 | |
| Return and RTO adjustment (8% of orders, revenue lost) | −58 | |
| Net revenue | 662 | |
| Landed product cost incl. packaging | −190 | Includes inbound freight |
| CM1 | 472 | 71% of net revenue |
| Outbound shipping (forward) | −65 | |
| Reverse shipping and RTO handling on failed orders | −22 | Spread across all orders |
| Payment gateway (2% on prepaid) and COD fee | −24 | |
| Warehousing and pick-pack | −18 | |
| CM2 | 343 | 52% of net revenue |
| Performance marketing per order (blended) | −210 | Blended ROAS on net revenue of about 3.2x |
| CM3 | 133 | 20% of net revenue |
Illustrative. Many brands see CM2 lower than this once COD share and RTO are realistic.
Now change one assumption: cash on delivery at 55% of orders with 25% RTO on those orders. The RTO line alone can take 6 to 9 points off CM2, because you pay shipping both ways, lose packaging, sometimes lose the product, and earn nothing. This is why investors ask for your COD share and your RTO rate in the first call.
The seven errors that turn 32% into 18%
- Starting from GMV or MRP. Every percentage after that is inflated. Start from net revenue.
- Leaving out RTO. Cash-on-delivery orders that come back cost you forward and reverse shipping plus handling. Include it, spread across all orders.
- Treating marketplace commission as marketing. Referral fees, closing fees, fulfilment fees and storage fees are fulfilment costs. They belong in CM2.
- Leaving marketplace ads out of CM3. Sponsored products, display and quick commerce visibility fees are marketing. Many decks count only Meta and Google.
- Ignoring free samples, gifts and influencer barter. If you send ₹15 lakh of product to creators every quarter, it is marketing cost at landed value.
- Using a blended CAC that includes organic customers. Investors compute paid CAC as paid spend ÷ paid-attributed new customers, and blended CAC separately. If you show only blended, they assume you are hiding the paid number.
- Showing one blended CM2. Show it by channel. A blended number hides the channel that is losing money, and investors will find it.
How do investors calculate CAC payback?
CAC payback is how many months it takes for a new customer's contribution to repay what it cost to acquire them. The key word is contribution. Revenue does not repay CAC; CM2 does.
| Input | Value |
|---|---|
| Paid CAC (paid spend ÷ new paid customers) | ₹900 |
| First order net revenue | ₹662 |
| First order CM2 | ₹343 |
| First order ROAS (net revenue ÷ CAC) | 0.74x |
| Expected repeat CM2 per customer per month, months 2 to 12 | ₹70 |
| Months to recover remaining ₹557 of CAC | About 8 months |
| Total CAC payback | About 9 months |
How should you present this in your deck and data room?
- One slide with the CM1 to CM3 waterfall per order, for your largest channel
- One table with CM2 by channel for the last 6 months, month by month
- Paid CAC, blended CAC, blended ROAS and CAC payback, trailing 6 months
- A note on definitions: what is in each line and what is not
- In the data room, the order-level export that lets an analyst rebuild all of it
When an investor can rebuild your numbers and gets the same answer, you have earned trust that no slide can buy.
Case study
The deck said 32%. The data said 18%.
Home and personal care brand, ₹14 Cr annual revenue, 48% own website, 38% Amazon, 14% quick commerce
Situation
The brand had a term sheet from a pre-Series A fund at ₹55 Cr pre-money, subject to diligence. The deck showed CM2 of 32%.
What was missed
The fund's analyst rebuilt CM2 from the order export and settlement reports. The deck's number had used selling price including GST as revenue, excluded RTO on COD orders (COD was 52% of website orders, with 27% RTO), and counted Amazon fulfilment fees as marketing. Rebuilt, CM2 was 18% blended and 9% on quick commerce.
What changed
The deal paused. The founders rebuilt the MIS on the investor's definitions, pushed prepaid with a small discount, raised the free-shipping threshold, and renegotiated shipping rates on volume. In four months, blended CM2 moved to 24%.
Outcome
The same fund came back, at ₹44 Cr pre-money. The founders accepted, because another four months without funding would have cost more than the valuation gap.
The lesson
The cost of an inflated CM2 is not the lower valuation. It is the four months you lose when an investor discovers it, and the trust you have to rebuild.
Illustrative case. Figures are representative of patterns in Indian consumer rounds, not a specific company.
For the broader view of how these numbers feed your valuation, read How Investors Really Value Consumer Brands. If you are preparing a raise in the next six months, send us your MIS and deck.
Read next: what investors check before writing a cheque and the working capital trap. Preparing to raise? See how our consumer brand fundraising support works.
Questions founders ask us
Should discounts be deducted from revenue or counted as marketing?
Brand-funded discounts are deducted to reach net revenue, because the customer never paid that money. Some investors also move deep promotional discounts into marketing to see the true cost of acquisition. Be clear in your definitions and consistent every month.
Is negative CM3 acceptable at pre-Series A?
Yes, if CM2 is healthy and CAC payback is within 6 to 12 months for a repeat category. Negative CM3 with weak CM2 is the combination investors avoid, because there is no margin to recover the marketing spend later.
What ROAS do investors expect from a consumer brand?
They look at blended ROAS on net revenue, all ad spend included, not the platform-reported ROAS of one campaign. A blended 2.5x to 3.5x is common for healthy consumer brands; below 2x usually signals that growth is expensive. ROAS only matters in relation to CM2: a 3x ROAS with 20% CM2 loses money on the first order.
How should warehouse and 3PL costs be treated?
Variable pick-pack and per-order warehousing costs go into CM2. Fixed warehouse rent and staff are overheads, below CM3. If your 3PL charges a monthly minimum, allocate it to CM2 once volume exceeds the minimum.
Do investors check CM2 against GST returns?
They check net revenue against GST returns and settlement reports, and product cost against purchase invoices and inventory records. If those match, your CM2 is believed. If they do not, nothing in your deck is.
About the author
Written by the Alphamark Ventures team, a fundraising advisory firm helping founders raise seed, angel and pre-Series A rounds, with a focus on consumer, consumer tech and consumer AI. Figures are as of the date shown and are for general information; this is not legal, tax or investment advice.
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