What is a healthy LTV:CAC ratio?

3× or higher is the standard benchmark for venture-backed startups. Below 1× means you lose money on each customer. Between 1–3× needs improvement. Above 5× is excellent.

How do you calculate LTV for a startup?

LTV = Gross profit per customer per month ÷ Monthly churn rate. For example, at ₹3,000 gross profit per customer and 5% monthly churn, LTV = ₹3,000 / 0.05 = ₹60,000. Average customer lifespan is 1 / churn = 20 months.

What is the difference between gross margin and contribution margin?

Gross margin = (Revenue − COGS) / Revenue. Contribution margin is the same absolute amount (revenue − variable costs) but sometimes excludes non-variable COGS. Both tell you how much each sale contributes toward covering fixed costs and eventually generating profit.

How is the CAC payback period calculated?

CAC payback is your customer acquisition cost divided by the gross profit each customer generates per month — it tells you how many months it takes to earn back what you spent to win them. For example, a ₹15,000 CAC against ₹3,000 gross profit per month is a 5-month payback. Shorter is better: under 12 months is considered strong for SaaS, and under 6 months is ideal for SMB-focused products.

What gross margin should an Indian SaaS startup aim for?

SaaS and software businesses typically target a 70–85% gross margin, while service-heavy businesses often run lower (around 30–50%). A margin below 40% makes it very hard to build a profitable business because too little is left to cover acquisition and fixed costs. This calculator computes your gross margin from your price and direct cost per customer so you can see where you sit.

Why does reducing churn improve LTV so much?

Because LTV is gross profit per customer divided by your monthly churn rate, churn sits in the denominator — so reductions have an outsized effect. Cutting monthly churn from 5% to 3% raises LTV by roughly two-thirds without changing price or cost. That's why retention is usually the single highest-leverage lever on your unit economics.

Can grants improve my unit economics without distorting them?

Yes — non-dilutive grant funding adds capital without adding equity dilution or debt, so it can bridge you toward breakeven or fund efficient growth without artificially flattering metrics like LTV:CAC. Unlike discounting, which lowers price and damages margins, a grant leaves your per-customer economics intact. It's a way to buy time to improve retention and pricing rather than papering over weak unit economics.

What's the difference between steady-state customer base and breakeven customers?

Steady-state base is the customer count you stabilise at given your monthly additions and churn (new customers divided by churn rate), while breakeven customers is how many paying customers you need so contribution margin covers your fixed costs. If your steady-state base is below your breakeven number, you won't reach profitability at the current acquisition pace — you'd need more new customers, lower churn, or lower fixed costs. This calculator surfaces both so you can compare them directly.

Unit Economics & COGS Calculator

Know your numbers: gross margin, contribution margin, LTV, CAC, LTV:CAC ratio, payback period, and the customer base needed to break even. Investor-ready unit economics in seconds.

Price per unit / per customer (monthly)

₹

How much a single customer pays per month (or price per unit sold).

₹5 thousands

Direct cost per unit (COGS)

₹

Direct costs to deliver the product/service to one customer: hosting, materials, support, payment gateway, etc.

₹2 thousands

Monthly operating expenses (fixed)

₹

All fixed costs: salaries, rent, software, marketing team, admin — costs that don't vary per customer.

₹50 lakhs

Customer acquisition cost (CAC)

₹

Total sales & marketing cost divided by new customers acquired. What it costs to win one customer.

₹15 thousands

New customers per month

How many new customers you acquire on average each month.

Monthly churn rate

Percentage of customers who stop paying each month. SaaS benchmarks: 3–7% monthly is typical.

Gross profit per unit

₹3,000

Price ₹50 − COGS ₹20 = ₹30. Per customer per month.

Gross margin60%

Contribution margin (per unit)₹3,000

Customer lifetime value (LTV)₹60,000

LTV : CAC ratio4×

CAC payback period5 months

Customers needed to break even (fixed costs only)1,667

Steady-state customer base1,000

Healthy margin. Service businesses typically run 30–50%.

Estimates only — not financial, tax or legal advice. Figures vary by state, capital and individual circumstances.

How to use this calculator

Enter your pricing, costs, and customer metrics to see your gross margin, LTV, CAC ratio, and the path to breakeven.

1
Enter price and direct costs. Monthly price per customer and the direct cost to serve them (COGS).
2
Enter fixed costs and CAC. Monthly operating expenses and how much it costs to acquire a new customer.
3
Enter growth and churn. How many new customers you add monthly, and what percentage churn each month.
4
Read your unit economics. See gross margin, LTV:CAC ratio, payback period, and breakeven point.

Higgsfield Plus — 1 year through Startup Grants India

Unit economics basics for startups

Unit economics tells you whether you make or lose money on each customer. It's the single most important metric for investor diligence — and for knowing whether your business model actually works. Every startup should know their gross margin, LTV, and CAC before raising institutional capital.

Gross margin: Revenue minus direct costs (COGS), as a percentage of revenue. SaaS companies target 70–85%. Low gross margins (<40%) make it very hard to build a profitable business.
LTV (Customer Lifetime Value): The total gross profit you earn from a customer over their entire relationship with you. LTV = Gross profit per month ÷ Monthly churn rate. A customer paying ₹5,000/mo with 5% monthly churn has an LTV of ₹5,000 / 0.05 = ₹1,00,000.
CAC (Customer Acquisition Cost): Total sales and marketing spend divided by new customers acquired. Every rupee spent on sales, advertising, and marketing divided by how many new customers that spend brings in.
LTV:CAC ratio: The golden metric. LTV divided by CAC. A healthy SaaS business targets 3× or higher. Below 1× means you spend more to acquire a customer than they'll ever pay you back — an unsustainable business.

Replit Core — 1 year through Startup Grants India

LTV:CAC benchmarks by stage

What constitutes a healthy LTV:CAC ratio depends on your stage and business model:

<1× — Unsustainable. You lose money on every customer. Fix unit economics before scaling.
1–3× — Needs improvement. Focus on reducing CAC or increasing LTV via retention or pricing.
3–5× — Healthy. Standard benchmark for venture-backed SaaS. Investors will be comfortable.
5–10× — Excellent. Strong moat and efficient growth. Consider increasing growth investment.
10×+ — Exceptional. May indicate you're under-investing in growth or your market is very large.

LTV:CAC is a lagging indicator — it takes months or years to measure accurately with actual retention data. Early-stage startups should model it based on churn assumptions and update as real data comes in.

Live webinar — Can Your Startup Win Grants? Tuesday 15 September, 10:00 AM. Register for ₹99

CAC payback period

CAC payback period is how many months of gross profit it takes to recover the cost of acquiring a customer. It's a useful complement to LTV:CAC because it measures capital efficiency — how fast you get your acquisition investment back.

CAC payback (months) = CAC ÷ Gross profit per customer per month

For enterprise SaaS, <12 months is strong. For SMB SaaS, <6 months is ideal. A payback period longer than 18–24 months means significant capital is tied up in customer acquisition — you need a lot of funding to grow.

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How to improve your unit economics

Reduce churn — the single highest-leverage action. A 5% to 3% monthly churn reduction doubles your LTV.
Increase price — test pricing regularly. A 10% price increase drops straight to gross profit.
Reduce COGS — optimise hosting, support automation, and delivery efficiency.
Reduce CAC — focus on higher-converting channels, improve your onboarding funnel, and increase self-serve signups.
Increase customer density — higher repeat purchases or usage drives LTV without changing price.

The best startups improve BOTH sides simultaneously — growing LTV (via retention and pricing) while reducing CAC (via product-led growth and virality). That's the formula for a 10× LTV:CAC ratio.

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