✦ AI Tool

Calculate Lease Costs and Generate Agreements

Instantly calculate complex rental obligations and generate a formatted, Word-ready lease agreement with visible Track Changes in under 60 seconds.

Free — no credit card
Key features

Built for legal-grade output

01 — Microsoft Word Fidelity

Every edit is tracked, every change explained.

Every calculation and clause exports perfectly to DOCX without losing professional formatting or layout integrity.

The vendor must maintain commercially reasonable security controls. The vendor should try to keep reasonable security practices in place.

Visible AI Revisions

Never trust a black box. Our editor shows every AI modification as a Track Change for complete legal transparency.

Instant Math Logic

Automatically calculate monthly prorations, security deposits, and annual escalations directly within your document draft.

Secure Data Privacy

Your financial data and lease terms are protected with enterprise-grade encryption and SOC2-compliant handling.

How it works

From prompt to contract in 3 steps

1

Input Lease Terms

Describe your rent amount, deposit, and term length in plain English or use our structured input fields.

2

Review AI Calculations

The AI calculates the total contract value and renders a fully annotated draft with all changes highlighted.

3

Export to DOCX

Download your final lease agreement as a professional Word document, ready for signature or further legal review.

Use cases

Who uses this

◇

small-business

Commercial landlords needing to calculate triple-net (NNN) costs and generate formal lease addendums for new tenants.

◇

freelancer

Residential tenants looking to verify their total financial commitment and draft a professional counter-offer lease.

◇

legal-team

In-house counsel quickly modeling rent escalations and drafting standard residential leases for property management portfolios.

About

A lease calculator is a digital tool used by landlords and tenants to determine the total financial obligation of a rental agreement, including monthly rent, deposits, and escalations. Beyond simple math, the ContractMaker.ai lease calculator integrates these figures directly into a professional legal framework. By using AI-native drafting, users can move from basic numbers to a comprehensive, Word-grade lease agreement in less than a minute. This tool is essential for understanding the long-term costs of commercial or residential real estate and ensuring that those costs are accurately reflected in the final contract language. Unlike static calculators, our system provides a dynamic editor where every calculation is transparently added to the document using Track Changes, allowing for a collaborative and trustworthy drafting process that meets professional legal standards.

FAQ

Frequently asked questions

Is this lease calculator free to use?
Yes, you can calculate your lease terms and generate a full draft for free without creating an account.
Can I export the results to Microsoft Word?
Absolutely. Every document generated is optimized for Microsoft Word, maintaining perfect DOCX fidelity and formatting.
How accurate is the AI with financial math?
Our AI is specifically tuned for legal and financial logic, but we always recommend reviewing the Track Changes to verify specific figures.
Does this tool provide legal advice?
No, this tool provides a drafting and calculation framework. We recommend having a qualified attorney review any lease before signing.
Do I need to sign up to see my contract?
No. You can describe your lease, see the calculated draft, and review the AI edits before you ever provide an email address.

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Popular Templates

Start from a contract template and customize it inline.

30-DAY NOTICE TO VACATE
DATE: [DATE OF NOTICE]
TO (LANDLORD/PROPERTY MANAGER): [LANDLORD NAME] PROPERTY ADDRESS: [FULL RENTAL PROPERTY ADDRESS]
FROM (TENANT): [TENANT NAME(S)]
1. NOTICE OF INTENT TO VACATE
Please accept this formal written notice that I/we, the undersigned Tenant(s), intend to vacate the premises located at [FULL RENTAL PROPERTY ADDRESS] on or before [LAST DAY OF TENANCY], which is at least thirty (30) days from the date of this notice.
2. LEASE TERMINATION
This notice is provided in accordance with the terms of the Lease Agreement dated [LEASE START DATE] and pursuant to applicable state and local landlord-tenant laws. The tenancy shall conclude at the end of the day on [MOVE-OUT DATE].
3. REASON FOR VACATING
(Optional) [INSERT REASON FOR MOVING, E.G., END OF LEASE TERM, RELOCATION, ETC.]
4. SECURITY DEPOSIT RETURN
I/we request that the security deposit of $[DEPOSIT AMOUNT] be returned in full to the following forwarding address within the timeframe required by law: Forwarding Address: [NEW MAILING ADDRESS]
5. PRE-MOVE OUT INSPECTION
I/we request a joint walk-through inspection of the premises before the move-out d
30 day notice to vacate
AFFIDAVIT
STATE OF [STATE/PROVINCE] COUNTY OF [COUNTY]
1. IDENTIFICATION OF AFFIANT
I, [FULL LEGAL NAME], residing at [FULL ADDRESS], being of legal age and sound mind, do hereby solemnly swear and affirm under penalty of perjury that the following statements are true and correct to the best of my knowledge, information, and belief.
2. PURPOSE OF AFFIDAVIT
This Affidavit is executed for the purpose of [DESCRIBE PURPOSE, E.G., VERIFYING RESIDENCY, DECLARING IDENTITY, OR WITNESSING AN EVENT].
3. STATEMENT OF FACTS
I hereby attest to the following facts and circumstances:
* [FACT 1: Describe the first factual statement in detail.] * [FACT 2: Describe the second factual statement in detail.] * [FACT 3: Describe the third factual statement in detail.] * [FACT 4: Describe the fourth factual statement in detail.]
4. PERSONAL KNOWLEDGE
The facts stated in this Affidavit are within my personal knowledge and are true. I have not omitted any material facts that would make this statement misleading or inaccurate.
5. COMPETENCY
I am competent to testify to the matters stated herein and have full legal capacity to execute
Affidavit Template
SOFTWARE DEVELOPMENT AGREEMENT
EFFECTIVE DATE: [DATE]
This Software Development Agreement (the "Agreement") is entered into by and between:
DEVELOPER: [DEVELOPER NAME], a [STATE] [ENTITY TYPE], located at [ADDRESS] ("Developer").
CLIENT: [CLIENT NAME], a [STATE] [ENTITY TYPE], located at [ADDRESS] ("Client").
1. SERVICES AND SCOPE OF WORK
Developer agrees to perform the development services described in Exhibit A (the "Project"). Any changes to the scope must be agreed upon in writing via a Change Order signed by both parties.
2. COMPENSATION AND PAYMENT
Client shall pay Developer the total sum of $[AMOUNT]. Payments shall be made according to the following milestone schedule:
• [PERCENTAGE]% upon signing as a non-refundable deposit.
• [PERCENTAGE]% upon delivery of [MILESTONE 1].
• [PERCENTAGE]% upon Final Acceptance.
3. INTELLECTUAL PROPERTY RIGHTS
Upon full payment of all fees, Developer hereby assigns to Client all right, title, and interest in the Work Product created specifically for Client under this Agreement. Developer retains ownership of any pre-existing code, libraries, or tools ("Developer Materials") used in the Project, but grants Cli
app development contract

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