Free calculators answer arithmetic questions: what is the payment, what is the total, what does this grow to at a fixed rate? The questions that decide real money are usually one level up — not 'what does my plan grow to at 7%' but 'in how many futures does my plan survive at all'. Averages hide the answer, because a portfolio that averages 7% but crashes in year two of retirement is a different plan from one that averages 7% smoothly. That is the gap the Pro tools exist to close: distributions instead of points, verdicts instead of raw outputs, and several methods on the same question so the disagreement between them becomes part of the answer.
Each tool is built to the same standard as the free library: the formula is shown, a worked example is computed in the guide below it, and the numbers on the page are produced by the same code the tool runs. The Monte Carlo simulator uses a fixed random seed, so the result you read about in its guide is the result on your screen for the same inputs — you can check our maths against your own future inputs before you ever pay. Pro membership also removes ads and unlocks the unlimited Scenario Vault, CSV and Excel exports, PDF reports and cross-data analytics across the free tools.
Nothing here is a sales funnel disguised as a calculator. The rental analyzer will tell you a deal loses money when it loses money; the valuation calculator shows you the lower market-method range next to the flattering DCF, not instead of it; the IRR analyzer says 'no meaningful IRR exists' when a cash-flow pattern has none. Tools that only ever deliver good news are marketing. These are instruments, and instruments are allowed to say no.
Which Pro Tools calculator should you use?
Will my retirement plan actually survive?
Monte Carlo Retirement Simulator — runs 1,000 futures and reports the success rate and the bad-luck outcomes, in today's dollars.
Judging a rental property before you offer
Rental Property Analyzer — cash flow, cap rate, cash-on-cash, DSCR and GRM in one pass, with every expense line modelled.
Buying, selling or pricing a business
Business Valuation Calculator — market multiples for seven industries next to a full DCF, so you see the negotiation range.
Any investment with uneven cash flows
IRR & NPV Analyzer — NPV, IRR, payback and profitability index together, with a verdict when they disagree.
Bringing a drifted portfolio back to target
Portfolio Rebalancer — outputs the exact self-funding trade list, sells first, then buys.
Why use DailyFinance for pro tools calculations?
Every calculator on this page shows its formula, works through real-number examples, and explains what your result actually means — including the mistakes that make most online estimates wrong. Your inputs are calculated in your browser; if you create a free account you can save scenarios and come back to them, but no tool on this site requires sign-up. All tools are reviewed by Tahir Shehzad, ACMA, and updated for the current tax year and current platform fees where those apply.
- Free, no sign-up required
- Formula shown for every result
- Reviewed by a qualified finance professional