Guides
The reasoning behind the calculators, written to be useful on its own.
What Is an Insurance Deductible?
A deductible is the part of a covered claim you pay before the insurer pays anything. It is the main lever for lowering a premium - and the main reason a claim can still hurt.
How Insurance Premiums Are Calculated
A premium is a base rate multiplied by rating factors, reduced by discounts, plus fees and tax. Knowing the structure tells you which parts are negotiable.
How Much Insurance Coverage Do I Need?
Coverage amounts should come from adding up obligations, not from a multiple of income. Here is what belongs in the calculation and what does not.
How Billable Hours Work
Billable hours are the unit most legal work is priced in. Understanding increments, utilisation and realisation explains why a full working day rarely produces a full day of billed time.
How Legal Deadlines Are Calculated
Deadline counting looks simple and is governed by rules that differ by jurisdiction, court and rule type. The arithmetic is easy; identifying which rule applies is the hard part.
Legal Fee Structures Explained
Each fee structure allocates risk between the firm and the client differently. Understanding which risk you are taking on is more useful than comparing headline rates.
How Mortgage Amortization Works
A fixed payment that never changes is split between interest and principal in proportions that change every month. Understanding that split explains most of what is confusing about long loans.
APR vs Interest Rate
The interest rate determines the payment. The APR folds fees into a rate so two offers with different fee structures become comparable - as long as the terms match.
How Lenders Assess Affordability
Affordability is decided primarily by a ratio capping total monthly debt against gross income - but the ratio is one gate among several, and the maximum is not a target.
How Position Sizing Works
Position size is a division: the amount you are willing to lose, divided by the distance to the stop. Everything else - conviction, available capital, leverage - is decoration.
Understanding Risk of Ruin
A positive edge only pays if the account survives long enough to collect it. Risk of ruin measures whether the position size makes that survival likely.
Why a Trading Journal Matters
Memory compresses losses, keeps winners vivid, and quietly deletes the trades taken outside the plan. A written record is the only correction, and it has to include the decision as well as the result.