In DevelopmentSaaS

DealForge (Real Estate ROI Calculator)

Strategy-based real estate deal-analysis SaaS that models rentals, flips, BRRRR, and creative-finance deals in minutes.

DealForge Real Estate ROI dashboard with an 'Analyze any real estate deal in minutes' banner, portfolio snapshot tiles, recent activity list with deal scores, and strongest-deal and plan-usage panels. — DealForge ROI dashboard

What it solves

Real estate investors analyze deals with spreadsheets, ad-hoc calculators, and scattered notes, so calculations are inconsistent, beginners do not know which numbers matter, hidden expenses get missed, and creative-finance deals are hard to compare. Wholesale, flip, rental, and seller-finance deals each need different math, and analysis is hard to turn into a clean report.

Built for Real estate investors from beginners to serious operators — rental investors, flippers, wholesalers, BRRRR and creative-finance investors, agents, and acquisition teams.

Overview

DealForge is a strategy-based real estate deal-analysis engine that lets investors evaluate multiple strategies from one clean interface, aiming to feel simple for beginners yet powerful for serious investors. It runs deterministic financial models across rental, flip, wholesale, BRRRR, and creative-finance strategies and turns the analysis into clean reports. An optional Anthropic-backed intelligence layer and optional market-data providers enrich analysis, both degrading to clearly-labeled fallback heuristics when unconfigured. Access, subscription tiers, and billing gate the product for individual investors and teams.

What this demonstrates

A deterministic multi-strategy financial engine that falls back to clearly-labeled heuristics when market-data providers or AI keys are absent, so results are never fabricated. It wires Clerk authentication (with a dev escape hatch), Stripe subscription tiers via signed webhooks, Resend email, Sentry error tracking, and optional Upstash-backed distributed rate limiting into a production-oriented Next.js app.

What makes it different

Not a basic ROI calculator — a strategy-based real estate deal analysis engine, simple enough for a beginner but powerful enough for a serious investor.

Strategy-first, not genericEach strategy has its own inputs, formulas, outputs, and validation rules.
Simple for beginners, powerful for prosShows only the inputs a chosen strategy needs.
Every metric explained in plain EnglishTooltips and 'why this matters' notes on each number.
One shared formula engineConsistent math across every strategy.
A Deal Score turns numbers into a verdictSays what is good, risky, or missing.

Core capabilities · 18

Rental Property
Cash flow, cap rate, DSCR, and returns for single-family and small residential rentals.
Multifamily Rental
Per-unit income and expense analysis for 2–20 unit properties.
Condo Rental
Rental math with HOA, special assessments, and rental-restriction flags.
Short-Term Rental
ADR, occupancy, and seasonality modeling for Airbnb/VRBO-style rentals.
Fix and FlipMaximum Allowable Offer
Project cost, ARV, offer ceiling, and net profit for renovation resale deals.
Wholesale
MAO, buyer spread, and assignment fee for seller-to-buyer deals.
BRRRRInfinite Return Flag
Refinance proceeds, cash left in deal, and infinite-return detection.
Subject-To
Entry cash, equity position, and risk flags for taking over existing financing.
Seller Financing
Monthly payment, balloon balance, and buyer ROI on seller-carried notes.
Lease Option
Option income, rent credits, and backend profit for rent-to-own deals.
House Hack
Net housing cost and monthly savings vs renting for owner-occupied rentals.
Apartment / Commercial
NOI, debt yield, IRR-ready cash flow, and exit value for larger income assets.
Shared Calculator Engine
Reusable formula library — mortgage, NOI, cap rate, DSCR, GRM, break-even — powering every strategy.
Deal ScoreDeal Score
0–100 quality score tuned per strategy and explained in plain language.
Sensitivity Analysis
Tests rent, vacancy, rate, rehab, and exit-price changes against the deal.
Saved Deals & Comparison
Save, duplicate, and compare 2–5 deals side by side.
Assumptions Library
Reusable presets for vacancy, management, CapEx, and financing rates.
Smart Guidance Layer
Tooltips, missing-input warnings, and deal red flags for beginners.

How it works

Select a real estate strategy
Enter only the inputs that strategy needs
Get deal performance calculated instantly
See a 0–100 Deal Score
Read what is good, risky, or missing
Save, compare, duplicate, or export the deal

How the score works

Deal Score

Cash flow strength
How much monthly cash flow the deal produces.
Cash-on-cash return
Annual pre-tax cash flow against total cash invested.
DSCR
Whether income covers debt service.
Vacancy tolerance
How sensitive the deal is to vacancy.
Expense ratio
Operating expenses against effective gross income.
Reserve strength
Whether reserves are adequate for the risk.

Key screens

Strategy SelectorFirst step: choose the type of deal to analyze.
Dashboard
New Deal Analysis
Saved Deals
Deal Comparison
Assumptions Library
Reports
Settings

Data model

User
Deal
DealInput
DealResult
AssumptionPreset
Report

Screens · 10

New Analysis strategy picker asking 'What type of deal are you analyzing?' with cards for Rental Property, Mid-Term Rental, Multifamily, Condo, Short-Term Rental, Fix and Flip, Wholesale, BRRRR, and Subject-To. — Strategy picker

DealForge Real Estate ROI new-analysis form for a beginner rental property, with property, income, and financing inputs beside a live Deal Score of 66/100 (Fair) and score breakdown. — Rental deal analysis with live Deal Score

Short-Term Rental analysis form with property, financing, revenue, and operating-expense inputs beside a Deal Score of 42/100 (Weak) and score breakdown showing 0% ROI. — Short-term rental analysis, 42/100

DealForge Saved Deals list with folder sidebar and 12 analyzed deals, each showing strategy, status, cash flow, COC, ROI, cap rate, and a color-coded deal score. — Saved deals list

Gateway 24-Unit apartment deal editor showing income and operating-expense inputs beside a Deal Score of 13/100 (Poor) with risk factors and score breakdown. — Commercial deal editor, 13/100

DealForge Assumptions Library showing reusable rate presets (Aggressive Rental, Conservative Flip, Conservative Rental, Creative Finance) with editable vacancy, maintenance, and financing rate fields. — Assumption presets library

DealForge Reports list of saved deals, each row showing strategy, purchase price, a deal score, and a Report button to generate a PDF. — Reports list

Printable deal analysis report for Gateway 24-Unit with executive summary, key metrics, property overview, income, and operating expenses, plus a Print/Save as PDF button. — Printable deal report

New Analysis strategy picker filtered to Advanced, showing BRRRR, Subject-To, Seller Financing, and Apartment/Commercial strategy cards with metrics and Analyze links. — Advanced strategy picker

New Analysis strategy picker filtered to Intermediate, showing Mid-Term Rental, Multifamily, Short-Term Rental, Fix and Flip, and Lease Option strategy cards. — Intermediate strategy picker

How it is built

A Next.js app with a Prisma + Postgres database, Clerk authentication, Stripe subscription billing, Resend email, Sentry observability, optional Upstash Redis rate limiting, and RentCast market data selected per data type.