Finance · Property Investment

Triple Net Lease Calculator

Estimate base rent plus separately entered tax, insurance, and maintenance charges.

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Quick guide

How to use this calculator

  1. Enter a single internally consistent property scenario.
  2. Use the field labels to preserve each page's specific investment, transaction, lease, development, or lodging convention.
  3. Review the calculator-specific boundary before interpreting the result.

Calculation method

Calculation method

Annual NNN cost = area × base rent rate + property-tax charge + insurance charge + maintenance charge.

Entered fixed decimals use exact rational arithmetic except the explicitly approximate IRR root. Money rounds only for display and supported nonzero amounts remain visible.

Worked example

Worked example

2,000 area units at 25 plus 8,000 tax, 2,000 insurance, and 5,000 maintenance totals 65,000 annually.

Annual NNN cost = area × base rent rate + property-tax charge + insurance charge + maintenance charge.

Supported inputs

Precision and limits

Visible input limits

Amounts accept up to 30 digits and 12 decimal places and are capped at 1e12 per input. Whole-number periods are capped at the page's stated range; rates are capped at 1000%.

International scope

No currency, tax regime, lease law, lender threshold, local market feed, appraisal, or jurisdiction-specific charge is assumed.

Decision boundary

Results are visitor-entered arithmetic scenarios, not appraisals, forecasts, loan approvals, legal or tax determinations, or investment recommendations.

Calculator-specific assumptions

Actual NNN definitions, reconciliation, administration, exclusions, and area bases are contract-specific.