How does agentOS calculate pro-rata rent?
agentOS pro-rates rent using the formula: monthly rent × 12 ÷ 365 × number of days. Pro-rating is applied automatically on the final rent call when a monthly tenancy ends mid-cycle.
When a tenancy is set up with a monthly rent schedule and the tenancy ends part way through a rent period, agentOS automatically calculates and applies a pro-rated amount on the final rent call.
The formula used is:
Monthly rent × 12 ÷ 365 × number of days in the final period
For example, if the monthly rent is £1,000 and the final rent period covers 15 days:
£1,000 × 12 ÷ 365 × 15 = £493.15
agentOS applies this calculation automatically — no manual adjustment is needed.
⚠️ Pro-rating only occurs when a tenancy end date falls within an active rent period. Monthly rent is not pro-rated simply because a month has fewer or more days than others (e.g. February). For more information on how agentOS handles rent due dates in February during non-leap years, refer to the related article.
If you need further assistance, contact support@agentos.com.