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Free Contribution Margin Calculator

Calculate per-unit contribution margin after COGS, shipping, fees, and ad cost — the most important number for DTC scaling.

Use this free contribution margin calculator to find per-unit profit after COGS, shipping, transaction fees, and ad cost. The number that determines whether DTC scaling is profitable.

✓ Free to use ✓ No signup ✓ Built for DTC brands ✓ Updates in real time

⚙️ Your Numbers

Selling Price Per Unit

Your average selling price (before discounts)

Cost of Goods Sold (COGS)

Product cost + packaging per unit

Shipping & Fulfillment Per Unit

Carrier cost + pick/pack + 3PL fees

Ad Spend Per Unit (CAC)

Total ad spend ÷ units sold

Payment Processing Fee

Shopify, Stripe, PayPal — typically 2.9%

Monthly Units Sold

Average orders per month (optional — for total margin)

📊 Your Results

Contribution Margin Per Unit

$26.12

profit per sale after all variable costs

CM Ratio

40.2%

Total Variable Costs

$38.89

Monthly CM Total

$13,058

Monthly Revenue

$32,500

Break-Even Units

—

Gross Margin %

72.3%

Cost Breakdown Per Unit

✅ Healthy contribution margin — your unit economics support profitable scaling.

Negative contribution margin on paid?

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Contribution margin formula: Selling Price − (COGS + Shipping + Payment Fees + Ad Spend per Unit).
Healthy DTC contribution margin: 30%+ for one-time-purchase, 40%+ for repeat-buyer brands, 50%+ for subscription.
Different from gross margin. Gross margin = Revenue − COGS only. Contribution margin includes ad spend — the real per-order profit.
Negative contribution margin = unsustainable. You’re losing money on every order even before fixed costs. Fix offer, AOV, or ad efficiency.
Highest-leverage moves: raise AOV with bundles, lower COGS via volume contracts, lower CAC via creative + retention, switch to flat-rate shipping.

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DTC Contribution Margin Benchmarks by Vertical

Median per-unit contribution margin (after COGS, shipping, payment fees, and ad spend) across DTC verticals.

Vertical	Median CM %	Top Quartile	Best in Class
Apparel & Fashion	25%	38%	50%+
Beauty & Skincare	40%	52%	65%+
Health & Supplements	45%	58%	70%+
Food & Beverage	20%	32%	45%+
Home & Garden	22%	35%	48%+
Electronics & Tech	15%	25%	35%+
Pet Products	30%	42%	55%+
Subscription / Recurring	50%	62%	75%+

Source: TGM client portfolio across 200+ DTC accounts. Subscription brands skew highest because retention compounds margin. Below 20% CM, paid scaling is unsustainable without subsidies or LTV runway.

Contribution Margin vs. Gross vs. Net vs. Operating — The 4 margins explained

Margin Type	What it includes	Formula	When to use it
Gross Margin	Revenue − COGS only	(Revenue − COGS) ÷ Revenue	Quick category profitability comparison
Contribution Margin	Revenue − ALL variable costs (COGS + ship + fees + ads)	(Rev − Variable Costs) ÷ Rev	True per-order profitability + DTC scaling
Operating Margin	Revenue − variable + fixed costs (rent, salaries)	(Rev − OpEx) ÷ Rev	Whole-business operating efficiency
Net Margin	Revenue minus EVERYTHING (variable + fixed + tax + interest)	Net Income ÷ Revenue	Bottom-line profitability after all costs

Contribution margin is the most useful margin for DTC because it includes ad spend. Gross margin overstates per-order profit by ignoring acquisition cost.

What Is Contribution Margin and Why Does It Matter?

Contribution margin is the per-unit profit AFTER all variable costs — COGS, shipping, payment processing, and ad spend. It’s the most important DTC unit economics number because it tells you whether each additional sale ADDS to profit or DRAINS from it. Most brands focus on gross margin (Revenue − COGS) and over-estimate per-order profit by 30–50% because they ignore the variable cost of acquiring the customer. Contribution margin fixes that by accounting for everything that scales with order volume.

The Contribution Margin Formula

CM = Selling Price − (COGS + Ship + Fees + Ads)

Example: $80 selling price − ($30 COGS + $8 shipping + $2.50 payment + $25 ad spend) = $14.50 contribution margin per unit. As a percentage: $14.50 ÷ $80 = 18.1% CM. Below benchmark for most verticals. The calculator above models this plus break-even units, monthly contribution, and which lever moves CM the most.

How Contribution Margin Connects to Scaling and Profitability

Contribution margin is the foundation of profitable scaling. Above 30% CM, every additional sale builds profit and lets you scale ad spend confidently. 15–30% CM is treadmill territory — growth covers fixed costs but doesn’t generate compounding profit. Below 15% CM, every order drains margin runway. The problem: most DTC brands have NEGATIVE CM in the first 90 days of paid acquisition because CAC is high. The fix is LTV — if customers buy 3+ times, low first-order CM is OK because lifetime CM compounds. Subscription brands often run negative first-order CM and still scale profitably because LTV justifies it.

What Is a Good Contribution Margin for DTC Brands?

Targets vary by vertical and business model. One-time-purchase brands (gifts, electronics, furniture) need 30%+ CM because LTV is essentially first-order. Repeat-purchase brands (apparel, beauty) target 40%+ CM with strong retention (50%+ repeat rate). Subscription / consumable brands can run lower first-order CM (10–25%) because LTV compounds quickly. Use the calculator above to find your specific CM and then compare against the benchmark table for your vertical. The fastest CM lifters: AOV bundles (5–15% lift), COGS volume contracts (5 points), and CAC reduction via creative + retention (often 20%+ improvement).

Diagnose: why is your contribution margin low?

Run through these in order. The first “yes” usually points at the highest-leverage fix.

If CAC is > 50% of selling price

Acquisition cost is consuming most of your unit profit. Use our CAC Calculator to benchmark. Fix CAC before scaling spend — better creative, broader audiences (Advantage+), retention email.

If shipping is > 15% of selling price

Shipping rates are killing CM. Renegotiate USPS/UPS contracts, switch to ShipBob/ShipStation flat rates, add free-shipping threshold ABOVE current AOV to lift orders without absorbing cost.

If COGS is > 50% of selling price

Margin on the product is too thin. Negotiate volume COGS contracts, raise prices selectively, or shift mix to higher-margin SKUs. 5 points of COGS recovery typically lifts CM 5–10 points.

If AOV is below your category benchmark

Lower AOV = thinner margin. Bundles, free-shipping thresholds, post-purchase upsells (ReConvert / OneClickUpsell) typically lift AOV 15–30% — which proportionally lifts CM since fixed costs don’t change.

If you have negative CM and no subscription / repeat motion

Unsustainable. You’re losing money on every order with no LTV runway to recover. Either lift CM via the levers above, or build subscription / repeat-buyer flows to make low first-order CM work.

If you’re using gross margin instead of contribution margin

You’re likely overestimating per-order profit by 30–50%. Always include ad spend, shipping, and payment fees in margin math — not just COGS.

10 ways to lift contribution margin this quarter

Tactics ordered by typical impact on contribution margin. Most ship in a single sprint.

Lift AOV with a free-shipping threshold above current AOV. Adds 5–15% AOV with no COGS increase. Fastest CM lever.
Add post-purchase upsells. ReConvert / OneClickUpsell typically add 8–15% to AOV with high-margin add-ons.
Negotiate volume COGS contracts. 5 points of COGS reduction at $1M+ inventory drops break-even units 10–15%.
Switch to flat-rate shipping or 3PL contracts. Most DTC brands overpay shipping by 15–25%. ShipBob, ShipStation, USPS Cubic are usually cheaper than retail rates.
Refresh creative to lower CPA. Lower CPA = higher CM per order. Frequency over 3.5 / week tanks ad efficiency.
Raise prices selectively. Most DTC brands have 5–15% pricing power they aren’t using. Test 10% price lifts on hero products.
Renegotiate payment processing. Stripe / Shopify Payments at $5M+/yr revenue can save 0.3–0.5% via custom rates.
Move fulfillment closer to customers. Multi-zone 3PLs (East / West / Central) cut shipping zones + costs 20–30%.
Add a subscription / replenish option. Subscription orders have 2–3x the LTV and don’t require new ad spend.
Cut underperforming SKUs from feed. Low-margin SKUs drag blended CM. Pause or relegate to organic-only listings.

What this calculator cannot tell you

Returns / chargebacks. Net contribution margin should also subtract return cost + chargeback fees. Apparel returns can hit 25–30%, dragging CM 5–10 points.
Mix-shift effects. If you sell multiple SKUs with different margins, blended CM hides single-SKU economics. Run separately by product line.
LTV horizon. First-order CM may be negative but lifetime CM healthy (subscription, repeat-buyer brands). Pair with our LTV Calculator.
Promotional impact. Heavy promo (20%+ off) typically halves CM. Strip promotional cohorts from CM analysis for true number.

Contribution margin glossary

Contribution Margin (CM): Per-unit profit after ALL variable costs (COGS, shipping, payment fees, ad spend). The most useful margin for DTC unit economics.
Variable Costs: Per-order costs that scale with volume. Includes COGS, payment processing, shipping, fulfillment, and advertising. Different from fixed costs (rent, salaries).
Fixed Costs: Costs that don’t change with order volume — rent, salaries, software, insurance. Covered by total contribution margin (units sold × CM/unit).
Gross Margin: Revenue − COGS only. Doesn’t include shipping, fees, or ad spend. Overstates per-order profit by 30–50% for most DTC brands.
Operating Margin: Revenue minus variable + fixed costs (but before tax/interest). Used for whole-business operating efficiency.
Break-Even Units: Fixed Costs ÷ Contribution Margin per Unit. The order volume needed to cover fixed costs. Use our Break-Even Calculator.
CAC (Customer Acquisition Cost): Total marketing spend ÷ new customers. The biggest driver of CM in DTC. Use our CAC Calculator.
AOV (Average Order Value): Revenue ÷ Orders. Direct multiplier on CM — a 10% AOV lift typically lifts CM 8–12 points. Use our AOV Calculator.
LTV (Customer Lifetime Value): Total gross profit per customer over their lifetime. Justifies low first-order CM if LTV is high. Use our LTV Calculator.
Margin of Safety: Difference between current sales and break-even sales. Higher CM = wider margin of safety = more cushion before losses.

We have rebuilt unit economics for 200+ DTC brands

If your contribution margin is below benchmark, we’ll show you exactly which lever (AOV, COGS, CAC, shipping) will lift it fastest — calc-driven, free, no obligation.

Book a Free Unit-Economics Audit →

Frequently Asked Questions

How is contribution margin calculated?

Contribution Margin = Selling Price − (COGS + Shipping + Payment Fees + Ad Spend per Unit). Example: $80 price − ($30 COGS + $8 shipping + $2.50 fees + $25 ads) = $14.50 CM per unit (18.1% margin). The calculator above models this plus monthly CM and break-even units.

What’s a good contribution margin for DTC?

30%+ for one-time-purchase brands (no LTV runway). 40%+ for repeat-purchase consumer brands. 50%+ for subscription / consumable brands where retention compounds. Below 15% CM is unsustainable without LTV runway. Subscription brands can run negative first-order CM if LTV is strong.

Contribution margin vs gross margin — what’s the difference?

Gross Margin = Revenue − COGS only. Contribution Margin = Revenue − ALL variable costs (COGS + shipping + payment fees + ad spend). CM is always lower because it includes more costs. CM is the right number for DTC unit economics; gross margin overstates per-order profit by 30–50%.

Should I include ad spend in contribution margin?

Yes — ad spend is a real per-order variable cost. Most CM mistakes come from omitting CAC. If you spend $25 in ads to acquire a customer who buys an $80 product, that $25 is part of variable cost. Contribution margin without ad spend = wrong number for DTC.

How do I lift contribution margin quickly?

Three biggest no-spend moves: (1) raise AOV with a free-shipping threshold or post-purchase upsell (5–15% AOV lift = 5–15% CM lift), (2) refresh ad creative to lower CAC, (3) renegotiate shipping or COGS at scale. Combined, these typically lift CM 8–15 points in 30–60 days.

Can contribution margin be negative?

Yes — very common in early-stage DTC. Means you’re losing money on every order BEFORE fixed costs. Unsustainable unless you have strong LTV (subscription, repeat-buyer model) to recover via lifetime margin. Either fix the unit economics or don’t scale.

How does contribution margin connect to break-even?

Break-Even Units = Fixed Costs ÷ Contribution Margin per Unit. Higher CM per unit = fewer units needed to break even. A $20K monthly fixed cost with $30 CM per unit needs 667 units to break even. Use our Break-Even Calculator.

Should I use contribution margin or LTV:CAC for unit economics?

Both. Contribution margin tells you per-order profitability TODAY. LTV:CAC tells you long-term unit economics. Brands with negative first-order CM but 4:1+ LTV:CAC can still scale profitably (subscription model). Brands with positive CM but 1:1 LTV:CAC are flat. Track both.

How do returns affect contribution margin?

Returns can drag CM 5–10 points, especially in apparel (25–30% return rates). Net CM should subtract return processing cost + restocking + shipping back. Track gross CM (calculator above) AND net CM (gross minus returns) for accurate unit economics.