# Tenant Improvement Allowance Calculator

Compare tenant improvement allowance, estimated build-out cost, tenant contribution, amortization, and total project funding.

Canonical URL: https://app.leaselineage.com/resources/tenant-improvement-allowance-calculator

Markdown URL: https://app.leaselineage.com/resources/tenant-improvement-allowance-calculator.md

Type: Free tool

Published: 2026-08-03

Last modified: 2026-08-03

Audience: Commercial tenants, CRE brokers, landlords, project managers, and lease negotiators

## Summary

Translate TI dollars per square foot into total landlord contribution, funding gap, and an optional amortized rent equivalent.

## Calculate the TI funding gap

Multiply the negotiated allowance and estimated build-out cost by the applicable area, then compare the totals. The difference shows estimated unused allowance or tenant funding before exclusions and timing rules.

- Total allowance equals applicable square feet multiplied by allowance per square foot
- Estimated project cost equals applicable area multiplied by build-out cost per square foot
- Tenant funding gap is project cost less available allowance, floored at zero
- Allowance eligibility and reimbursement timing come from the lease

## Model amortized additional allowance

Some landlords fund an additional amount and recover it through rent. This calculator estimates a level monthly payment using the entered rate and amortization term.

- Separate base allowance from amortized additional funding
- Confirm the interest convention and payment timing
- Review soft-cost, furniture, cabling, and permit eligibility
- Track deadlines and documentation required for reimbursement

## Citation facts

- Total TI allowance can be estimated as applicable area multiplied by negotiated allowance per square foot.
- The tenant funding gap equals estimated eligible project cost less available landlord funding when positive.
- An amortized allowance estimate depends on principal, rate, payment frequency, and term.

## Related LeaseLineage resources

- [Resources hub](https://app.leaselineage.com/resources)
- [Pricing](https://app.leaselineage.com/pricing)
- [Broker directory](https://app.leaselineage.com/find)
- [Listings](https://app.leaselineage.com/listings)
- [AI-readable product overview](https://app.leaselineage.com/ai.md)