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SheetModel
Free Excel models
Real EstateE-commerceConstructionB2B SaaSWorkforceAbout
Real estate + e-commerce underwriting

Interactive calculators that hand you the Excel model — not just the answer.

Enter your deal or SKU economics, get the numbers instantly, then download a formula-complete multi-tab workbook pre-filled with everything you typed. Built for rental investors, BRRRR operators, Amazon sellers and DTC brands.

Run a rental cash flow modelBrowse all 25 tools
10
Live calculators
3
Excel tabs per model
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rental-property-cash-flow-model.xlsx3 tabs · live formulas
Cap rate5.55%
Cash-on-cash−1.42%
Monthly cash flow−$182.11
DSCR1.07x
Break-even occupancy106.4%
Download .XLSX — pre-filled with your inputs
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The calculator answers the question

Sliders and inputs update NOI, Cap Rate, CoC, DSCR, ROAS or reorder points as you type. No submit button, no page reload, no email required.

The workbook answers the next twenty

Download a .xlsx with real formulas — amortization schedules, pro formas, fee matrices — so you can stress-test liquidity, exit caps or supplier terms yourself.

Auditable methodology

Every formula is published in plain text on the page, reviewed by a financial model auditor, and cross-checked against the live workbook.

Real Estate

5 tools

Underwriting tools for landlords, BRRRR investors, short-term rental operators and small-balance commercial buyers. Every calculator ships a formula-complete Excel model.

  • Rental property cash flow calculator
  • Airbnb & short-term rental revenue projection
  • BRRRR method investment calculator
  • Landlord rent roll & expense tracker
Open the real estate hub

E-commerce

5 tools

Profit, inventory and pricing tools for Amazon FBA sellers, Shopify brands and DTC operators. Every calculator exports a working Excel model with your numbers already in it.

  • Amazon FBA profit & fee calculator
  • Inventory reorder point planner
  • Break-even ROAS & target CPA calculator
  • DTC unit economics & cohort tracker
Open the e-commerce hub

Construction

5 tools

Job costing, AIA-style progress billing, change orders, bid leveling and equipment rates for general contractors and trade subcontractors.

  • Contractor job costing & bid estimator
  • Schedule of values & AIA progress billing
  • Construction change order log calculator
  • Subcontractor bid comparison matrix
Open the construction hub

B2B SaaS

5 tools

MRR waterfalls, runway and burn, cap table dilution, sales capacity and SaaS health scorecards — the models founders and FP&A teams maintain between board meetings.

  • MRR / ARR subscription waterfall model
  • Startup runway & burn rate calculator
  • Cap table, SAFE conversion & dilution model
  • Sales capacity & quota attainment model
Open the b2b saas hub

Workforce

5 tools

Shift scheduling and overtime compliance, PTO accrual and liability, turnover cost, fully burdened labour rates and commission plan engines.

  • Employee shift schedule & overtime calculator
  • PTO accrual & carryover tracker
  • Employee turnover cost & retention ROI calculator
  • Blended labour burden rate calculator
Open the workforce hub

Every model on the site

25 calculators across two verticals. Each one exports a multi-tab workbook with your inputs already in it.

Real EstateRental property cash flow calculatorEnter the purchase price, loan terms and rent — get NOI, Cap Rate, cash-on-cash return and DSCR instantly, then download the 3-tab Excel model with 30-year amortization.3 linked Excel tabs →Real EstateAirbnb & short-term rental revenue projectionModel seasonality month by month, then see turnover costs, platform fees, NOI and cash flow — and download the 365-day Excel projection with a cleaning cost matrix.3 linked Excel tabs →Real EstateBRRRR method investment calculatorModel purchase, rehab, bridge loan and refinance to see exactly how much capital comes back out — and download the renovation budget and refinance workbook.3 linked Excel tabs →Real EstateLandlord rent roll & expense trackerTrack every unit, every rent payment and every invoice inline — collection rate, economic vacancy and deductible expenses update live, and the download maps to IRS Schedule E.3 linked Excel tabs →Real EstateCommercial real estate underwriting modelUnderwrite NLA, rent escalation, DSCR and a 10-year levered IRR with an exit cap rate — then download the rent roll, pro forma and debt & equity workbook.3 linked Excel tabs →E-commerceAmazon FBA profit & fee calculatorSize tier, referral fee, fulfillment, storage, returns and ad spend broken into one honest per-unit P&L — plus the downloadable workbook with a live fee matrix and batch simulator.3 linked Excel tabs →E-commerceInventory reorder point plannerSafety stock from real demand and lead-time variability, a reorder point that reflects supplier reliability, and a downloadable purchase order generator.3 linked Excel tabs →E-commerceBreak-even ROAS & target CPA calculatorFind the exact ROAS where paid acquisition stops losing money, the CPA ceiling for your profit target, and the spend level where diminishing returns take over.3 linked Excel tabs →E-commerceDTC unit economics & cohort trackerEnter your monthly repeat rates and see contribution-margin LTV at 12, 24 and 36 months, your true LTV:CAC ratio and the month your cohorts pay back.3 linked Excel tabs →E-commerceShopify product pricing matrixBuild true unit cost, derive a margin-targeted retail price, test promo, wholesale and marketplace tiers — and find the discount point where margin collapses.3 linked Excel tabs →ConstructionContractor job costing & bid estimatorBurden your labour, allocate overhead, then price the job from a real margin instead of a multiplier — and download the cost-code workbook with a client quote tab.3 linked Excel tabs →ConstructionSchedule of values & AIA progress billingBuild a schedule of values that reconciles to the contract sum, then calculate completed-to-date, retainage and the exact amount to invoice this period.3 linked Excel tabs →ConstructionConstruction change order log calculatorPrice change orders properly — cost impact, markup, delay days and contingency consumption — and see the cumulative change percentage before it becomes a dispute.3 linked Excel tabs →ConstructionSubcontractor bid comparison matrixLevel every bid against the same scope, quantify the exclusions, and let the standard deviation tell you which bid is a mistake rather than a bargain.3 linked Excel tabs →ConstructionEquipment depreciation & hourly cost calculatorTurn a machine’s purchase price, fuel burn and maintenance into a defensible hourly rate you can charge to jobs — including the cost of idle hours.3 linked Excel tabs →B2B SaaSMRR / ARR subscription waterfall modelNew, expansion, contraction and churn resolved month by month into NDR, GRR, quick ratio and ARR growth — with a cohort retention tab and a board-ready dashboard.3 linked Excel tabs →B2B SaaSStartup runway & burn rate calculatorProject cash month by month with compounding revenue growth, find your zero-cash date, and get the month by which you must open the next round.3 linked Excel tabs →B2B SaaSCap table, SAFE conversion & dilution modelModel valuation caps, discounts and Series A conversion exactly as investors will, then see founder ownership and dilution before you sign the term sheet.3 linked Excel tabs →B2B SaaSSales capacity & quota attainment modelTurn an ARR target into a hiring plan: ramp-adjusted AE capacity, pipeline coverage and the SDR headcount required to feed it.3 linked Excel tabs →B2B SaaSSaaS quick ratio & Rule of 40 evaluatorScore six diligence-grade SaaS metrics — quick ratio, Rule of 40, magic number, CAC payback, NDR and GRR — against the thresholds investors actually apply.3 linked Excel tabs →WorkforceEmployee shift schedule & overtime calculatorEnter daily hours and get the federal weekly overtime split, the California daily and double-time split, and the fully burdened employer cost of the week.3 linked Excel tabs →WorkforcePTO accrual & carryover trackerModel accrual rates, annual caps and rollover limits — and see the real balance-sheet liability your PTO policy creates.3 linked Excel tabs →WorkforceEmployee turnover cost & retention ROI calculatorPrice the full cost of losing an employee — recruitment, vacancy, ramp-up and manager time — then calculate the ROI of the retention program that prevents it.3 linked Excel tabs →WorkforceBlended labour burden rate calculatorAdd every statutory and discretionary employer cost to a wage, produce one fully burdened hourly rate, and derive the client bill rate that protects your margin.3 linked Excel tabs →WorkforceSales commission tier & bonus engineProgressive commission bands, accelerators above quota and clawbacks on churned deals — with the cost-of-sales check that tells you whether the plan is affordable.3 linked Excel tabs →
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Why these models exist

Search results have become good at explaining formulas and bad at doing arithmetic on your numbers. Ask an AI engine for a rental property analysis and you will get a definition of cap rate. What you will not get is a linked model where changing the vacancy assumption recomputes NOI, DSCR, break-even occupancy and your ten-year equity position at the same time.

That gap is where SheetModel lives. Every tool on this site follows the same three-part structure: a live calculator, a published methodology you can audit, and a downloadable workbook with formulas intact so you can keep working after the tab closes.

What the downloads contain

  • Live formulas referencing isolated input blocks — not pasted values.
  • Schedules that span the full decision horizon: 360 amortization periods, 10-year pro formas, 36-month cohorts.
  • Your own inputs pre-filled, so the file is useful the moment it lands in your downloads folder.
  • Compatibility with Excel, Google Sheets, Numbers and LibreOffice — no macros, no add-ins, no protected sheets.

Nothing is uploaded anywhere. The workbook is assembled in your browser, which is also why there is no signup wall in front of it.