Real Estate & Property

Two-stage BRRRR modeling -- acquisition/rehab cash basis through an ARV-sized cash-out refinance, with explicit infinite-return detection, DSCR, and post-refinance cash-on-cash return.

Unlevered property valuation and yield analysis with Effective Gross Income adjustments and market cap rate matrices.

Cash-Out Refinance ROI Calculator (Break-Even Return on Released Equity) - math and vectors complete, content pending.

Solve for the required monthly savings to hit a down payment goal by a target date, or the time needed at a fixed monthly contribution, with compounding interest.

Escrow Shortage Calculator (Why the Payment Rises Twice Over) - math and vectors complete, content pending.

Fix and Flip ROI Calculator (70% Rule, Full Costing & Annualised Return) - math and vectors complete, content pending.

Gross Rent Multiplier Calculator (GRM, and the Cap Rate It Hides) - math and vectors complete, content pending.

Estimate an itemized closing cost breakdown as low-high ranges, disclosing that actual costs vary by lender and state.

Compute the fixed payment, CLTV, and total interest on a lump-sum home equity loan, and how it differs mechanically from a HELOC.

Algebraic back-solver determining maximum home purchase price under conventional 28/36 DTI guidelines with property taxes and insurance.

Owner-occupant multi-unit housing cost analysis -- full-property PITI net of rental offset from non-owner-occupied units, benchmarked against comparable single-unit market rent.

Indonesia Land and Building Tax Calculator (PBB-P2 under UU 1/2022)

Compare a current mortgage against a rate-and-term or cash-out refinance, covering payment, break-even, and net lifetime interest.

Property Tax Appeal Savings Calculator (Present Value Over a Holding Period) - math and vectors complete, content pending.

Annual property tax and monthly escrow on any home value in any of the 50 states, using each state average effective rate, with a national rank and the gap against the 50-state average.

Statutory real estate transfer tax for any of the 50 states, covering flat rates, marginal brackets and the New York and New Jersey mansion cliffs, with a national ranking.

Rent Escalation Calculator (Fixed vs Index-Linked Lease Increases) - math and vectors complete, content pending.

Comprehensive rental investment cash flow analysis with NOI derivations, mortgage debt service, and Cash-on-Cash returns.

Quantify what vacancy costs a rental property, showing net operating income and cap rate against an optimistic zero-vacancy assumption, plus the breakeven occupancy needed to cover operating expenses and debt service.

Short-term rental unit economics (nightly rate, occupancy, platform/management/cleaning costs) run side by side against the identical property financed as a long-term rental.

Singapore Property Tax Calculator 2026 (Owner-Occupier & Non-Owner-Occupier AV Rates) - math and vectors complete, content pending.

Singapore Rental Income Tax Calculator 2026 (15% Deemed Expenses vs Actual, Plus Property Tax) - math and vectors complete, content pending.

Singapore Stamp Duty Calculator 2026 (BSD + ABSD for Citizens, PRs, Foreigners & Entities) - math and vectors complete, content pending.

Tenant Turnover Cost Calculator (Vacancy, Make-Ready, Letting Fee & Concession) - math and vectors complete, content pending.