LTV and CAC: How Customer Payback Turns into Company Value

LTV is the discounted margin a company expects to earn from a customer for as long as that customer stays; CAC is the full cost of acquiring that customer, including sales salaries and the first-period discount. For corporate finance, what matters is not either figure on its own but their ratio and the time it takes for acquisition spending to come back in cash: it is this period that determines how much a company can safely put into growth, and whether the marketing budget is an expense or an investment with a measurable return. If acquisition pays back faster than the company burns through working capital, growth finances itself; if it pays back more slowly, revenue growth will be accompanied by a widening hole in cash flow, and the income statement will not show it.

What exactly stands behind each letter

CAC is not the advertising budget divided by the number of new customers. The correct denominator is only the customers who came through paid channels, and the correct numerator includes marketing and sales payroll, partner commissions, the cost of sign-up bonuses and promotional tariffs. Organic traffic that ends up in the denominator understates CAC and makes the unit economics look better than they are.

LTV is calculated not from revenue but from the customer's gross margin: the cost of service, acquiring fees, support and the cost of refunds are deducted from the average ticket. The margin stream is then multiplied by the expected lifetime and discounted — the lifetime is derived from cohort churn, not from a hoped-for hypothesis. The higher the churn, the shorter the customer's life and the more sensitive LTV is to any deterioration in retention. Terminology in presentations is loose, so first of all look for the definition the company itself uses; basic concepts such as gross margin and discounting are covered in the site's glossary.

Why you need to look at the ratio and the payback period

A low CAC taken on its own says nothing: it is easy to achieve by acquiring customers who leave after a period or two. A high LTV taken on its own says nothing either: it may rest on an assumption about a lifetime that no cohort has yet lived through. Two pairings do the work.

The first is the ratio of LTV to CAC. As long as it stays above the threshold beyond which acquisition pays back with a cushion for overheads, scaling up the budget increases the value of the company. When the ratio compresses, every additional rouble of marketing is already destroying value, even if revenue keeps growing.

The second is the CAC payback period, expressed in months of gross margin. This is the bridge between unit economics and the balance sheet: the payback period shows how much working capital a company has to hold in order to grow without taking on debt. The ratio can look healthy while the payback period is long — and then the company is solvent in theory and illiquid in practice.

What these metrics leave out and where the site has no data

LTV and CAC are standardised neither under IFRS nor under RAS: they are management metrics that a company discloses voluntarily and in the version that suits it. The site's database does not store them — there are no metrics with such codes, and they cannot be inserted with a directive. Only one source remains: investor presentations and call transcripts, which issuers publish together with their financial statements. They are worth looking at in the reports section, and the dates of publications and calls are in the events calendar. A company most often announces changes in methodology not in the figures but in a footnote, so it also makes sense to follow the issuer's news flow.

It is useful to set unit economics against how the market values the stock: the instrument card SBER and the earnings multiple 3,92 give the part of the picture that the site calculates from financial statements — the rest has to be built up from disclosures. The full list of traded securities is in the stocks section.

How to check a disclosure, step by step

Step 1 — find the definition of CAC in the presentation footnote and check whether sales payroll is included.

Step 2 — check the denominator: whether paid acquisitions are separated from organic ones.

Step 3 — find out whether LTV is calculated from revenue or from gross margin; LTV based on revenue cannot be compared with CAC.

Step 4 — find the discount rate and the horizon. If the horizon is longer than the company's own history, the lifetime is a hypothesis.

Step 5 — compare churn across old and new cohorts. Worsening retention in recent cohorts while the disclosed LTV stays unchanged is a reason not to trust the disclosure.

Step 6 — convert the ratio into a payback period and set it against cash flow from operations: that is where you can see whether growth is being paid for by the company's own margin or by outside money.

How an investor should read this

A company with a long CAC payback period is especially sensitive to the cost of money: when the rate rises, debt-financed growth is the first to stop creating value. Unit economics should therefore be read alongside the debt burden and market yields — reference points for the risk-free curve are in the OFZ section. Mature businesses with a customer base that has already paid back, by contrast, convert retention into distributable cash flow — here it is more useful to look at the payout history in the dividends section.