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We’re seeing many emerging software-as-a-service (SaaS) companies make their way to the spotlight. With SaaS still relatively young, it’s easy to get confused with the acronyms of the trade.

That’s why we’ve put together The Easy-to-Understand SaaS Dictionary containing all the essential industry terms to help you make sense of it all. In this glossary, you’ll find list of metrics to keep you current with your business performance and terminology that you can add to your SaaS vocabulary.


Annual Recurring Revenue (ARR)

ARR is the value of recurring subscription revenue that a business will recognize in a calendar year. It is also equal to monthly recurring revenue (MRR) multiplied by 12.


Annual Run Rate Revenue (ARRR)

ARRR is ARR plus additional revenue that is not attributed to a recurring subscription. This could include professional services or implementation fees.


Average Revenue Per User (ARPU)

ARPU is the average revenue recognized per user, per month.


Average Selling Price (ASP)

The average price that your product or service is sold for, per month, year or other measurement. Ideally, cost to acquire a customer should not exceed ASP.



Bookings are the dollar value of contracts in a specified period of time, including both subscription and non-subscription revenue.


Burn Rate

Burn rate is the rate per month that a company spends its cash (often venture capital) as it grows before generating profit.


Customer Acquisition Cost (CAC)

CAC is the dollar amount spent acquiring customers (marketing and business development cost) divided by the number of customers acquired over a particular period of time. This cost can also be further broken down by desired marketing channel.



Churn is the rate at which customers cancel their subscriptions.

Learn more:

5 Churn-Reduction Qualities That Keep Your SaaS Product Sticky


Customer Lifetime Value (CLTV or CLV)

Value of the recurring profit stream over a customer’s lifetime minus customer acquisition cost.

Learn more:

4 Tips to Taking Advantage of Your Customer Lifetime Value


Committed Monthly Recurring Revenue

Projection of MRR into the future accounting for anticipated account expansion and churn.


Contracted Monthly Recurring Revenue

MRR that is contractually guaranteed.



A group of customers that signed up around the same time or took part in the same onboarding group.


Customer Retention Cost

Expenses derived from retaining customers such as the renewals team, professional services team, customer marketing and other costs.


Customer Retention Rate

How many customers are retained from the beginning to the end of the period, not including new customers.


Deferred Revenue

Revenue and cash are not the same. Cash can be obtained upfront but it does not qualify as revenue until it has been earned.


The technical definition of Dunning is “to make insistent demands for the payment of a debt.” (Investopedia) In the context of SaaS, it may often refer to emails being sent to a user when their payment has expired.


Logo Churn

Also known as “Customer Churn”. Churn calculated based on customer name/company — regardless of deal size.


Monthly Recurring Revenue (MRR)
Total amount of subscription revenue expected from customers every month excluding any additional, non-recurring payments such as implementation fees or professional services fees.

Learn more:

Mistakes You’re Making When Calculating & Tracking MRR

MRR Churn

Churn as measured by monthly recurring revenue lost, regardless of number of companies lost as customers.


New Bookings

New contracts, renewals, upgrades, refunds and other changes to subscriptions that impact total bookings — bookings are all items with an impact on revenue.


Normalized Contracts

Contracts changed so that they are similar enough to be measured against one another; for example, by assigning an average MRR to a contract paid annually to compare it to a contract paid monthly.



The process that new customers go through when they are becoming customers.


Professional Services

Assisting customers with best practices and strategies on how to run their business, beyond product training.


Renewal Bookings

Bookings from previously existing contracts.


Renewal Rate

Rate of customer retention.


Revenue Backlog

Unrecognized revenue that will become recognized over the term of the contract.


Revenue Churn

Churn measured by dollar amount of contracts lost.


Revenue Recognition

Revenue becomes recognized from a contract only once it has been earned, whether or not it has been paid in advance.



Months of runway are how many months of cash the company has to operate at the current burn rate.


Total Contract Value (TCV)

This total includes both one-time and recurring charges, but not usage charges.


Want the definitions to payments and financial terms. See our Glossary of Payment Terms.