Lease deadlines · Renewal and termination notice
Renewal, extension and termination notice deadlines, as dates.
A lease rarely states the day a renewal notice is due. It says “not later than twelve months before the Expiration Date”, and the Expiration Date is itself “the last day of the 120th full calendar month after the Commencement Date”. Prism reads the rule, computes the date in code, and returns it with the clause it came from, so you can check the arithmetic in a minute.
What comes back
Sample rows from two leases we wrote for this page: a 120-month office lease commencing June 19, 2025, and a retail lease expiring March 31, 2036. A date is either stated in the lease or computed from a rule the lease states, and the result says which.
| Date | What it is | How it was found | The clause |
|---|---|---|---|
| Jun 29, 2029 | Last day of the retail sales kick-out window | Computed: the 90th day after the Measurement Date, March 31, 2029, the last day of Lease Year 3. A notice given on the Measurement Date itself is early, and void | “"Kick-Out Window" means the period beginning on the day after the Measurement Date and ending at 5:00 p.m. Ohio time on the ninetieth (90th) day after the Measurement Date.” |
| Jun 30, 2031 | Last day to give the office Termination Notice, with the fee | Computed: 12 months before the Termination Date, June 30, 2032, the last day of the 84th full calendar month. The window opens Dec 30, 2030 | “A Termination Notice given before the earliest date or after the latest date permitted by this Section, or not accompanied by the Termination Fee, is void and of no effect. Time is of the essence.” |
| Jun 30, 2034 | Last day to give the office Renewal Notice | Computed: 12 months before the Expiration Date. The window opens Dec 30, 2033, 18 months before; a notice given earlier is void | “delivered not earlier than the date that is eighteen (18) months before, and not later than the date that is twelve (12) months before, the Expiration Date” |
| Jun 30, 2035 | The office lease expires | Stated in the memorandum of dates as the last day of the 120th full calendar month after the June 19, 2025 commencement. The May 31, 2035 estimate in the basic lease information is superseded | “The Expiration Date, being the last day of the one hundred twentieth (120th) full calendar month after the Commencement Date, is June 30, 2035.” |
| Jul 5, 2035 | Last day to exercise the retail Renewal Option | Computed: 270 days before the Expiration Date, March 31, 2036. The window opens Apr 1, 2035, 365 days before | “not earlier than three hundred sixty-five (365) days and not later than two hundred seventy (270) days before the Expiration Date. Time is of the essence. A notice given before or after that period is void” |
The rows are from a contract we wrote for this page, not a customer’s. Every result also carries what happens if the date is missed and the page it is on. How often Prism finds these dates is on the accuracy page.
What Prism looks for
Renewal and extension options
Both ends of the notice window: the last day to give notice and the first day it may be given. Notice given too early is usually as void as notice given too late.
Termination, break and kick-out rights
The date the right takes effect, the notice window, and any fee that has to travel with the notice.
The expiration date behind them
Computed from the commencement date and the term formula, or taken from a memorandum of dates, rather than from an estimate the lease itself says is superseded.
Time of the essence
Whether a late notice is merely late or void, and whether a deadline that lands on a weekend is extended or stands.
Automatic renewal and non-renewal notice
Evergreen clauses where silence renews the lease, and the last day to stop that.
Conditions on the option
No default, minimum occupancy, no assignment: the conditions the lease attaches to exercising the option, quoted.
Rent commencement and steps
When rent starts after the abatement period, and each scheduled increase.
Event-driven deadlines
Estoppel returns, consent responses and audit windows that run from a request are returned with their rule and left undated until the request is made.
What it will not do
Prism returns what the lease states and quotes where. It does not tell you whether to renew, does not count a period stated in business days (that is returned with its rule and left for you to date), and does not fill in a term the lease leaves out. It is not legal advice, and reminders are best-effort.
Use it from an AI agent
Prism is a remote MCP server. In Claude Code:
claude mcp add --transport http prism https://prism.parad1gm.com/api/prism-mcpThen ask: “Read this lease and list every renewal, extension and termination notice deadline, with the clause each one comes from.” The agent sends the document with prism_review_contract and reads the result with prism_get_contract. Setup for Claude on the web, Cursor, VS Code and A2A agents is on the agents page.
$0.50 a contract for an agent, and the first 3 are free. On the website it is $1 per contract, or $9 a month for up to 50.
Questions
Why does the notice window have two ends?
Most option clauses say "not earlier than" one date and "not later than" another. A notice outside either end is usually void, and the lease often says time is of the essence, which means a late one will not be rescued. Prism returns both ends and the clause that sets them.
Does the model estimate the date?
No. The model reads the rule and the anchor it runs from (the expiration date, the commencement date, a measurement date), and code computes the date. If the lease never states the period or the anchor, the date is left empty rather than guessed.
What if the expiration date itself is a formula?
Many leases define expiration as the last day of the Nth full calendar month after commencement and print only an estimate up front. Prism uses the formula, or the memorandum of dates when the lease has one, and measures the renewal window from that.
What about an amendment that extends the term?
Send it with amendsContractId, or add it from the lease on the site, and it is read together with the lease. The renewal window moves with the new expiration date, and a termination option the amendment deletes is left out of the list.
Will Prism remind me?
For a paid lease, yes: an email 90, 30 and 7 days before each deadline. From an agent, prism_upcoming_deadlines returns the open deadlines across every contract in the account, soonest first.
Is this legal advice?
No. It tells you what the lease says and where. Before you rely on a notice deadline, read the clause it quotes and, for a lease that matters, ask a lawyer.