Approach
How calculator results are built
Most Wealthton calculators use standard financial formulas such as compound growth, future value of recurring contributions, reducing-balance loan payments, and withdrawal modeling. Each calculator page explains its specific formula or logic in its methodology section.
Inputs are intentionally simple. A calculator should help a visitor understand the main levers before adding advanced details that may create false precision. When a page uses simplified math, the explanation should say what is simplified and why.
Assumptions
What assumptions usually matter most
The most important assumptions are return rate, interest rate, inflation, contribution amount, withdrawal amount, time horizon, and whether money is invested or kept in cash. Small changes in these inputs can produce very different results over long periods.
We encourage visitors to run conservative, middle, and optimistic scenarios instead of relying on one output.
Limits
What calculators usually leave out
Most tools do not include taxes, fees, changing income, account rules, insurance, legal costs, lender-specific pricing, market crashes, or behavioral decisions. Some calculators mention extra exclusions where the topic requires it.
This is intentional. A calculator result is a planning estimate, not a contract, quote, product recommendation, or professional financial plan.
Use
How visitors should use results
A good result should lead to a next question: Can I increase savings? Should I pay debt faster? Is this mortgage still comfortable? Does renting preserve flexibility? Am I relying on an optimistic return?
When the result affects a major decision, visitors should verify details with official documents, lenders, tax professionals, or licensed advisers where appropriate.
Scenario design
Why one result is not enough
Many financial decisions are sensitive to a small group of assumptions. A retirement estimate may change sharply with inflation, a rent-versus-buy result may flip with the holding period, and a debt payoff plan may improve simply by stopping new charges.
That is why Wealthton pages encourage multiple runs: a cautious case, a reasonable middle case, and a stronger case. The spread between those results is often more useful than the single number in the largest font.
Examples
How examples are chosen
Examples are designed to feel like everyday decisions rather than perfect textbook cases. A useful example includes tradeoffs: cash safety versus investing, lower debt versus faster growth, home equity versus flexibility, or a higher contribution versus a tighter monthly budget.
Example numbers are rounded for readability. They should teach the relationship between inputs and outputs, not imply that a specific household should copy the exact values.
Updates
When methodology changes
We update methodology notes when the calculator logic changes, when reader feedback reveals confusion, or when a page needs a clearer explanation of taxes, fees, account rules, or regional assumptions.
A methodology update should make the tool easier to audit. If a result looks surprising, visitors should be able to identify which input, formula, or assumption likely caused it.
Reality check
Why real life can differ
Actual results can differ because markets do not move in a straight line, interest rates change, lenders use their own underwriting rules, tax treatment varies, and people change jobs, homes, goals, and spending habits.
The calculators are most valuable when used as planning maps: they show direction, pressure points, and tradeoffs. They are not guarantees of a future account balance or a substitute for documents that apply to your exact situation.
Cross-checks
How we sanity-check outputs
Calculator outputs should move in the direction a reasonable reader expects. A higher contribution should usually raise a future balance, a higher debt rate should usually increase interest cost, and a longer mortgage should usually reduce the payment while increasing total interest.
When a result looks surprising, we check whether the issue is the formula, the default assumptions, the label, or the explanation around the result. Many calculator problems are not math errors; they are clarity errors.
Regional rules
How regional calculators are treated
Some tools use region-specific assumptions, such as RRSP and TFSA rules, EMI language, or retirement-account names. These pages should avoid implying that a local rule applies globally. Where possible, the tools page only shows region-specific calculators to the relevant audience.
Regional assumptions can change, so readers should verify contribution room, tax rules, lending requirements, and product terms using local official sources before acting.
Default values
Why defaults are examples, not recommendations
Default values are chosen to make the calculator understandable on first load. They should create a realistic-looking scenario, but they are not recommendations for how much to borrow, invest, save, withdraw, or contribute.
Visitors should replace defaults with their own numbers before using a result. When a default creates a surprising answer, the page should explain the assumption doing the most work.