Is the calculator free?

Initial calculations are available on every plan; project-linked storage and scenarios are tied to paid plans.

Does it handle LP/GP waterfalls?

Indicatively — preferred return and promote can be modeled. Full waterfall complexity belongs in Argus.

Can I model multiple capital structures?

Yes. Capital-structure sensitivity is supported alongside cost and exit sensitivity.

What's the difference between yield-on-cost and cap rate?

Yield-on-cost uses your project cost as the denominator; cap rate uses market value. For development, yield-on-cost is the more honest metric.

Does it factor in financing costs during construction?

Yes — carry cost is computed from the timeline and the blended interest rate.

Can I export the calculation?

Yes — PDF for distribution and structured tables for Argus or Excel import.

Development ROI Calculator — Inputs, Formula, And A Worked Example

ROI calculators come in two varieties: simplistic ('cost in, sale out, percentage out') and overbuilt ('paste your full Argus model here'). The useful range is in between — enough inputs to capture the real economics, few enough that an analyst can run a scenario in a minute and iterate.

Buildora IQ's ROI calculator takes the cost band, the exit assumption, the timeline, and a capital-structure summary, then returns yield-on-cost, equity multiple, and a sensitivity band that shows where the deal flips. This page covers the inputs, the formula, and walks a worked example.

The inputs that drive a development ROI

Total project cost (hard + soft + contingency + fees + carry). Exit assumption (sale price for build-to-sell, or stabilized NOI and cap rate for build-to-hold). Timeline (months from acquisition to exit). Capital structure summary (loan-to-cost, blended interest rate, equity required). These four inputs are enough to produce a defensible ROI for development underwriting. More inputs add precision but cost iteration speed — the right level depends on whether you're triaging deals or finalizing one.

The formula at the heart of it

Yield-on-cost (build-to-hold): stabilized NOI / total project cost. Profit (build-to-sell): exit sale price - total project cost - selling costs. Profit margin: profit / total project cost. Equity multiple: total profit + equity returned / equity invested. Sensitivity ranges are applied to cost (+/-15% by default), exit (+/-10% by default), and timeline (+/-12 weeks). The output shows central, low, and high outcomes for each metric.

Worked example: 4-plex in Phoenix

Inputs: 4-plex, 1,200 sqft per unit, mid-tier quality, Phoenix metro, 12-month construction window, build-to-hold. Total project cost band: $1.95M-$2.35M (central $2.15M). Stabilized rent: $1,950/unit/month, 5% vacancy, $14k/year per-unit operating expense. Stabilized NOI: ~$71k. Yield-on-cost at central: ~6.7%. Sensitivity range: 5.6% to 8.0% depending on cost realization. At a 5.5% market cap rate the stabilized value is roughly $1.95M — below central project cost. The deal works as a hold for cash-flow but doesn't refinance to neutral equity; the analysis surfaces this constraint before committing.

How the calculator differs from Argus and Excel

Argus is the institutional standard for IRR waterfalls and complex capital structures. Excel is the everywhere tool with infinite flexibility and infinite error surface. The platform's calculator is in between — structured enough to prevent the common errors of Excel underwriting (formula breaks, missed sensitivity, hidden assumptions) without the Argus learning curve.

Use Cases

Four-Input Calculator: Cost, exit, timeline, capital structure — enough to be honest, few enough to iterate.
Sensitivity Output: Central, low, and high outcomes for every metric — see where the deal flips.
Build-To-Sell And Build-To-Hold: Profit margin for flips, yield-on-cost for holds — both supported.
Worked Example Templates: Common project types pre-loaded with reasonable defaults you can override.

Frequently Asked Questions

Is the calculator free?: Initial calculations are available on every plan; project-linked storage and scenarios are tied to paid plans.
Does it handle LP/GP waterfalls?: Indicatively — preferred return and promote can be modeled. Full waterfall complexity belongs in Argus.
Can I model multiple capital structures?: Yes. Capital-structure sensitivity is supported alongside cost and exit sensitivity.
What's the difference between yield-on-cost and cap rate?: Yield-on-cost uses your project cost as the denominator; cap rate uses market value. For development, yield-on-cost is the more honest metric.
Does it factor in financing costs during construction?: Yes — carry cost is computed from the timeline and the blended interest rate.
Can I export the calculation?: Yes — PDF for distribution and structured tables for Argus or Excel import.

Related Resources

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