Annual Recurring Revenue (ARR) is a vital metric for Software as a Service (SaaS) businesses, reflecting annual subscription revenue. Calculating ARR involves annualizing monthly recurring revenue and adjusting for new customers, upgrades, downgrades, and churn. Accurate calculation of ARR requires consistency in revenue recognition and regular monitoring to keep the calculations precise. Regular adjustments in ARR calculation are essential for reflecting accurate financial health and forecasting future growth. Understanding and accurately calculating ARR can lead to better business insights and strategic decisions for your SaaS company.