ModeldrillBuild financial models that survive new assumptions.
Write real model pieces in a live spreadsheet grid, from revenue builds to debt schedules and valuation. Every answer is rechecked with changed inputs, so only formulas that hold up pass.
Write it once, fill it across, test it.
- 01Write the first cellClick a highlighted cell and type the formula, with the assumptions locked where they need to be.
- 02Fill the row or the scheduleFill right and Fill down copy it with references adjusted, exactly as a spreadsheet would.
- 03Survive new assumptionsThe model is recalculated with changed inputs. Hard-coded numbers and sliding references are flagged by cell.
Five levels, from a growth row to a valuation.
| 01 | Model basics | Assumption blocks, price times volume, costs as a share of revenue, gross margin, growth rows and the absolute and mixed references that make a row fill cleanly. |
| 02 | Income statement and schedules | Operating costs, EBITDA, straight-line depreciation by asset and by purchase year, fixed asset roll-forwards, interest on debt, taxes with a floor and loss carryforwards. |
| 03 | Debt and cash | Loan payments, full amortization tables, IPMT and PPMT, revolver draw and repayment rules, working capital from days, cash flow from operations and coverage tests. |
| 04 | Valuation | Unlevered free cash flow, discount factors, the mid-year switch, NPV and IRR, terminal value by growth and by exit multiple, the equity bridge, XNPV and XIRR. |
| 05 | Analysis | Scenario switches with CHOOSE and INDEX MATCH, break-even, one-way and two-way sensitivities, payback, CAC payback and lifetime value. |
Timed mode for real speed.Each model piece gets a clock. Hints and solutions stay locked until time is up, and your best times are kept.
Start free. Pay once you are hooked.
Pro
- Schedules, debt and cash, valuation and analysis
- Worked solutions with explanations
- Progress and best times saved to your account
Payments open soon. The free exercises work now.
Questions
Who is this for?
Analysts who build forecasts, finance and business students, and small business owners who want a model they can trust. Each exercise is a real piece of a model: a revenue build, a schedule, a valuation step.
How are my formulas checked?
Every answer cell is recalculated twice: once on the numbers you see and again with changed assumptions. A typed-in number or a reference that slides the wrong way when filled gives the right answer once and the wrong one the second time, and you are told which cell broke.
Is it the same as Excel?
The grid runs the functions models rely on with the same arguments and results: SUM, IF, MAX, MIN, AND, INDEX, MATCH, CHOOSE, SUMPRODUCT, SUMIF, COUNTIF, ROUNDUP, PMT, IPMT, PPMT, NPV, IRR, XNPV, XIRR and more. Fill right and Fill down copy a formula with the references adjusted, just like dragging the fill handle.
Do I need an account?
No. The first five exercises work without one and save progress in your browser. A free account saves progress across devices, and Pro unlocks the rest.
How do I cancel the monthly plan?
Open Account and choose Cancel subscription. That is the whole process: you keep Pro until the end of the period you paid for and are not charged again. If Pro is not for you, you get a full refund within 14 days of paying.
What if my answer is right but marked wrong?
Answers are checked on the result they produce, not on how they are written, so any correct answer passes. If a check still gets it wrong, use the report link under the result. Reports are reviewed, and a check that is wrong gets fixed.