Quick answer. The basic revenue formula is Revenue = Quantity Sold multiplied by Price per Unit. Recurring businesses use Revenue = Number of Customers multiplied by Average Revenue per Customer, expressed monthly as MRR or annually as ARR. And the forward-planning formula Leads multiplied by Conversion Rate multiplied by Average Deal Value is the one that turns revenue from a number you report into a number you can plan.
Revenue looks like the simplest number in a business: money in, from selling things. The formula behind it is genuinely simple. What is less obvious is that there is not one revenue formula but several, each suited to a different kind of business and a different purpose and that the most valuable version is not the one that tells you what you earned, but the one that tells you what you have to do to earn more. This article walks through every form of the formula you are likely to need, and ends on the one that matters most for planning.
The basic revenue formula
At its core, revenue is quantity multiplied by price:
Revenue = Quantity Sold × Price per Unit
If a business sells 500 units of a product at 40 dollars each, revenue is 20,000 dollars. That is total, or gross, revenue at the top line, before any costs or deductions. It is the figure most people mean when they say “revenue”, and it is the starting point for everything else. The simplicity is the point: revenue measures what you sold, not what you kept. Profitability comes later, after costs are subtracted; revenue is the raw measure of sales volume and pricing working together.
Gross versus net revenue
Gross revenue is the full amount billed. Net revenue subtracts the deductions that reduce what you actually realise refunds, returns, discounts and allowances:
Net Revenue = Gross Revenue − Returns, Discounts and Allowances
The gap between the two tells its own story. A large or growing difference can signal discounting to hit a number, quality problems driving returns, or promotional dependence. For planning purposes, net revenue is usually the more honest figure to build a target around, because it reflects the money the business keeps rather than the money it invoiced.
The recurring revenue formula
Subscription and SaaS businesses do not sell a unit once; they sell access that renews. For them, revenue is better expressed as customers multiplied by what each pays over a period:
MRR = Number of Customers × Average Revenue per Account (monthly)
ARR = MRR × 12
Monthly Recurring Revenue and Annual Recurring Revenue are the same measure at different cadences. They matter because they describe predictable, repeating income rather than one-off sales, which is what makes recurring-revenue businesses valuable and, in principle, plannable. A company with 200 customers each paying 500 dollars a month has 100,000 dollars in MRR and 1.2 million dollars in ARR and, crucially, it starts each new month with that base rather than from zero.
The revenue growth formula
For a recurring business, the interesting question is not the level of revenue but its movement. Net new revenue in a period is what you add minus what you lose:
Net New MRR = New MRR + Expansion MRR − Churned MRR
New MRR comes from new customers, expansion MRR from existing customers upgrading or buying more, and churned MRR from customers downgrading or leaving. The relationship between these three is the engine of a subscription business. A related measure, net revenue retention, captures it in a single ratio:
Net Revenue Retention = (Starting MRR + Expansion − Churn) ÷ Starting MRR
When net revenue retention exceeds 100 percent, the existing customer base grows on its own even before any new customers are added expansion outpaces churn. That is the strongest position a recurring-revenue business can be in, and it is why growth planning gives as much attention to expansion and retention as to new sales.
Revenue run rate: annualising what you have
A young company rarely has a full year of history to work from, so it often annualises a recent period instead. That is the run rate:
Annual Run Rate = Revenue in a Period × Number of Those Periods in a Year
A business doing 50,000 dollars in a representative month has a 600,000-dollar run rate. Run rate is a useful quick read on scale, but it is easy to abuse: annualising a single unusually strong month, or a seasonal peak, produces a figure that flatters rather than informs. Treat it as a rough gauge of current pace, not a forecast; it assumes nothing changes, which is rarely true. The moment you use a run rate to set a target, you have quietly turned an assumption of “more of the same” into a commitment, which is exactly the trap forward planning is meant to avoid.
Billed versus recognised revenue
For subscription businesses, when you collect money and when you are allowed to count it as revenue are not the same thing, and confusing the two produces plans that do not match how the business actually books income. If a customer pays 12,000 dollars up front for an annual plan, you have billed 12,000 dollars but you recognise it gradually, typically 1,000 dollars a month as the service is delivered. The portion not yet earned sits as deferred revenue, a liability, until it is.
Recognised Revenue in a Period = (Total Contract Value ÷ Contract Length) × Periods Elapsed
Billed and recognised revenue can tell very different stories in the same month a big annual deal spikes billings but adds only a small slice of recognised revenue. Deciding which one a target is built on is not a technicality; it determines whether the plan reflects cash coming in or revenue being earned, and those are different questions with different answers.
The formula that lets you plan, not just report
Every formula so far describes revenue you have already earned. They are backward-looking by nature; you can only calculate them once the quantities are known. Useful for reporting, they do little to help you decide what to do next. The forward version reverses the direction. Instead of measuring output, it models the inputs required to produce it:
Revenue = Leads × Conversion Rate × Average Deal Value
Read left to right, this is a plan. It says: to earn a given amount of revenue, you need a certain number of leads, converting at a certain rate, at a certain deal size. Fix the revenue you want on the left, and the formula tells you the pipeline you need on the right. That is the move from reporting to planning and it is why the same simple arithmetic that looks trivial in a finance report becomes powerful the moment you run it backward from a goal.
Why the forward formula is rarely that simple in practice
The single-line version hides real complexity, and ignoring that complexity is how plans built on it fail. Conversion is not one rate but many it differs at every funnel stage and across every lead source. Deal value varies by segment. Sales cycles mean the leads generated this quarter produce revenue in a later one. And new sales reps take months to ramp before they close at full capacity. A credible forward plan expands the single conversion rate into stage-by-stage and source-by-source rates, and layers in time. The formula stays conceptually the same; it simply gains the resolution needed to be trusted.
The revenue formulas at a glance
| Purpose | Formula |
| Basic (unit) revenue | Quantity Sold × Price per Unit |
| Net revenue | Gross Revenue − Returns, Discounts, Allowances |
| Monthly recurring revenue | Customers × Average Revenue per Account |
| Annual recurring revenue | MRR × 12 |
| Net new recurring revenue | New MRR + Expansion MRR − Churned MRR |
| Net revenue retention | (Starting MRR + Expansion − Churn) ÷ Starting MRR |
| Forward planning revenue | Leads × Conversion Rate × Average Deal Value |
From formula to revenue plan
A formula on its own is a calculator; a plan is a formula you can steer. The step between them is committing to a target on the revenue side, decomposing it through the forward formula into the pipeline and activity it requires, and then tracking the real inputs against the plan as they arrive. When actual leads, conversion and deal sizes start to differ from the assumptions, you adjust either the activity or, if the math has genuinely changed, the target. The formula gives you the skeleton; plan-versus-actual tracking gives it the ability to respond to reality. That is precisely what a Digital Revenue Twin automates: it holds the forward formula for your specific business, populates it with benchmarked assumptions until your own data replaces them, and shows plan against actual results continuously.
Common mistakes when calculating revenue
Confusing revenue with profit. Revenue is the top line before costs; profit is what remains after them. A large revenue figure can sit above a loss.
Mixing billed and recognised revenue. They diverge most in exactly the months a subscription business is growing fastest, which is when the error does the most damage.
Annualising an unrepresentative period into a run rate. A peak month or a one-off deal, multiplied out, produces a number the business will not repeat.
Counting bookings or pipeline as revenue. A signed contract or an open opportunity is not earned revenue, and treating it as such overstates the picture.
Ignoring returns, discounts and allowances. Planning on gross when net is what you keep builds a target on money you will not realise.
FAQ
What is the basic revenue formula?
Revenue equals quantity sold multiplied by price per unit. It measures total sales at the top line, before any costs are deducted. Selling 500 units at 40 dollars produces 20,000 dollars in revenue.
How do you calculate recurring revenue?
Monthly recurring revenue is the number of customers multiplied by the average revenue per account per month, and annual recurring revenue is MRR multiplied by twelve. These measure predictable, repeating income rather than one-off sales.
What is the revenue growth formula?
Net new recurring revenue equals new MRR plus expansion MRR minus churned MRR. Net revenue retention, calculated as starting MRR plus expansion minus churn divided by starting MRR, shows whether the existing customer base grows on its own.
What is the difference between gross and net revenue?
Gross revenue is the full amount billed; net revenue subtracts returns, discounts and allowances. Net revenue reflects what the business actually keeps and is usually the more honest figure to plan a target around.
How do you use a revenue formula for planning?
Use the forward formula leads multiplied by conversion rate multiplied by average deal value and run it backward from the revenue you want to the pipeline you need. Expand the single conversion rate into stage and source rates, layer in sales cycle and ramp, and track actuals against the plan.
