Quick Commerce Margin Calculator for Blinkit, Zepto & Instamart

How to use the quick commerce margin calculator

1. Enter your SKU. Add MRP, selling price, GST rate, landed cost, packaging and inbound freight for one pack size.
2. Pick how the platform earns. Choose margin on MRP if the platform buys your stock, or commission if you sell on the platform as a seller.
3. Add platform fees and write-off. Include fulfilment, storage or margin support, plus the share of stock lost to damage or expiry.
4. Add monthly units and ad spend. This turns per-unit margin into a monthly number and shows your break-even ROAS.
5. Read CM1, CM2 and CM3. Then compare Blinkit, Zepto and Instamart side by side to see where the SKU earns most.

What is contribution margin in quick commerce?

Contribution margin in quick commerce is the money a brand keeps on each unit sold through Blinkit, Zepto or Swiggy Instamart after paying for the product, packaging, the platform’s margin or commission, platform fees, freight to the warehouse, stock write-off and in-app ads. It shows whether each unit adds money to the business before fixed costs such as salaries and rent.

A SKU with positive contribution pays for itself. A SKU with negative contribution loses money on every unit, however fast it sells. That is why fast-growing quick commerce sales can still hurt a brand’s profit.

How do you calculate contribution margin on quick commerce?

Start with net sales per unit after GST and the platform’s cut, then subtract costs in three steps: product costs give CM1, platform and logistics costs give CM2, and ads give CM3. Divide each by net sales to get the percentage.

Step-by-step formula:

1. Net sales per unit: Margin model: MRP × (1 − platform margin %) ÷ (1 + GST rate). Commission model: selling price ÷ (1 + GST rate).
2. CM1 = net sales − landed product cost − packaging
3. CM2 = CM1 − platform commission and fees − inbound freight − write-off
4. CM3 = CM2 − ad spend per unit
5. Contribution margin % = CM3 ÷ net sales × 100
6. Monthly contribution = CM3 × units sold per month

Write-off per unit sold = (landed cost + packaging + freight) × write-off % ÷ (1 − write-off %), because stock that expires still had to be made, packed and shipped.

What are CM1, CM2 and CM3 for quick commerce brands?

CM1, CM2 and CM3 split contribution margin into three levels so you can see exactly where margin disappears: CM1 after product cost, CM2 after platform and logistics costs, and CM3 after ads.

If CM1 is already thin, ad optimisation will not fix the SKU. The price, pack size or platform terms need to change first.

Margin on MRP vs commission: how do Blinkit, Zepto and Instamart earn?

Quick commerce platforms earn from brands in two ways: by buying stock at a discount to MRP (margin model) or by charging a commission and fees on each sale (commission model). Which one applies depends on your agreement, and the margin maths changes completely between them.

Several quick commerce platforms have moved many brands toward purchase-order buying over the past year. Blinkit (owned by Eternal), Zepto and Swiggy Instamart do not publish a standard seller margin or commission and fees on each sale on their public pages, so always use the figure from your term sheet or seller dashboard. If you do not have an offer yet, use the calculator’s max affordable margin as your negotiation ceiling.

What is break-even ROAS on Blinkit, Zepto and Instamart ads?

Break-even ROAS is the return on ad spend your quick commerce campaigns must beat for ads to pay for themselves. Calculate it as selling price ÷ CM2 per unit. For a ₹279 SKU with ₹76.29 CM2, break-even ROAS is 3.66.

Platforms report ROAS on sales at the selling price, so this is the number to compare against your Blinkit, Zepto or Instamart ad dashboard. A campaign showing ROAS of 3 on that SKU loses money on every ad-driven sale, even if the SKU is profitable overall. Running below break-even only makes sense for a launch with a fixed end date and a plan to earn it back through repeat orders. Strong quick commerce advertising starts from this number.

If you cannot claim GST input tax credit on ad spend, your real break-even ROAS is about 18% higher.

Worked example: ₹299 MRP snack SKU on a margin model

Assumptions: MRP ₹299, shelf price ₹279, 5% GST, landed cost ₹95, packaging ₹8, inbound freight ₹12, 2% write-off, 32% platform margin on MRP, 1,500 units a month, ₹30,000 ad spend a month, GST input tax credit claimed. The 32% margin is for illustration only, not a platform rate.

What it means:

1. Monthly contribution after ads: ₹84,437
2. Break-even ROAS: 3.66
3. Highest platform margin this SKU can afford: 51.8% with ads, 58.8% without ads
4. Minimum MRP to keep 15% CM3 at these terms: ₹249.51

Next, check per-unit platform fees for your exact terms.

What is a good contribution margin on quick commerce?

There is no universal benchmark across categories, but a quick commerce SKU is healthy when CM3 stays positive at your real ad spend and CM2 is comfortably larger than your ad cost per unit. As a planning rule, our team looks for CM2 of at least 1.5 times ad spend per unit, so promotions or higher bids do not push the SKU into a loss.

1. Hero SKUs earn, trial SKUs can run thin. A small trial pack can sit near zero CM3 if it brings buyers to larger packs.
2. Write-off stays low. Rising write-off usually means stock is spread across too many dark stores for its rate of sale.
3. There is headroom to the max affordable margin. That gap absorbs festive discount support and future rate changes.
4. The cash cycle fits your working capital. Under a purchase model, the platform’s payment terms decide how much cash the channel ties up.

How can brands improve margins on quick commerce?

1. Fix price and pack size before ads. If CM1 is thin, move to a larger pack or multipack so fixed per-unit costs spread over a higher price.
2. Negotiate with your max affordable margin in hand. Know your ceiling before you negotiate with the platform’s category team.
3. Cut inbound freight per unit. Consolidate shipments and send full cartons to fewer warehouses at launch.
4. Bring write-off down. Match stock to rate of sale per dark store. Plan it with our Stock Cover Calculator.
5. Spend on ads only above break-even ROAS. Shift budget to search placements for keywords that already convert.
6. Claim GST input tax credit on fees and ads. For GST-registered brands, this alone can lift CM3 by several points.

Check Blinkit, Zepto and Instamart fees in detail

Use our platform fee calculators to get per-unit fees, then bring them back here for the full margin picture.

Quick commerce margin glossary

Contribution margin

Money left per unit after all variable costs of selling, before fixed costs.

CM1

Net sales minus product cost and packaging.

CM2

CM1 minus platform fees, inbound freight and write-off.

CM3

CM2 minus ads and promotions.

Platform margin (trade margin)

The discount off MRP at which a quick commerce platform buys stock from a brand.

Commission

The percentage of the selling price a platform deducts from each sale in a marketplace model.

ROAS

Return on ad spend, ad-attributed sales divided by ad spend.

Break-even ROAS

The ROAS at which ad spend exactly equals the contribution it brings in.

Write-off

Stock sent to a platform that is never paid for because of damage or expiry.

Dark store

A small, closed warehouse near shoppers that quick commerce platforms use for 10 to 30 minute delivery.

Input tax credit (ITC)

GST paid on business costs, such as platform fees and ads, that a GST-registered brand can offset against its own GST liability.

Frequently asked questions

Sources

• GST rate rationalisation, 56th GST Council meeting, effective 22 September 2025: ClearTax summary
• Blinkit seller portal: seller.blinkit.com
• Zepto brand onboarding: brands.zepto.co.in
• Swiggy Instamart brand portal: partner.instamart.in