RATIOXA LEARN · Money
Decision guides: Money
Understand the variables, common mistakes and crossovers before you calculate. Refinance, repay or invest? Equal time horizons and transparent interest logic.
Refinancing: lower payment or real saving?
Why total cost, new term and fees matter more than the new monthly payment.
Read article →Repay or invest: guaranteed versus uncertain
Compare the loan rate and expected after-tax return without false certainty.
Read article →Compound interest and real purchasing power
How starting capital, contributions, time, return and inflation shape future value.
Read article →Loan cost: payment, interest and overpayment
Read an amortisation schedule and understand the guaranteed effect of extra payments.
Read article →Repay a loan early or save?
Compare guaranteed interest saving, liquidity and uncertain return fairly.
Read article →What does break-even mean in refinancing?
Find the month when ongoing savings cover switching cost.
Read article →Why a low payment does not prove a cheap loan
Reveal term, balloon, fees and interest cost behind the monthly payment.
Read article →Effective APR versus nominal rate
Which rate matters for the offer, amortisation and total cost.
Read article →Nominal versus real return
Separate account growth from purchasing power after inflation.
Read article →Why long-term investment fees matter
Understand small annual fees as a persistent drag on compounding.
Read article →Why monthly payments can be misleading
A shared framework for cars, homes and loans.
Read article →Interpret tighter lending standards in July 2026
Read the Bank Lending Survey as a market survey, not a personal credit prediction.
Read article →Refinancing with switching costs
Translate fees, early repayment and the new term into a real break-even.
Read article →Overpayment and early-repayment cost
Separate mathematical interest saving from contractual rights and charges.
Read article →Return downside instead of a certain expectation
Test investing against repayment using negative, low and central returns.
Read article →How to read IRR
Understand implied return, multiple sign changes and reinvestment assumptions.
Read article →NPV versus simple ROI
Recognise timing and required return where ROI only divides totals.
Read article →Longer term, lower payment, higher cost
Value cash-flow relief separately from additional years of interest.
Read article →Principal is not a cost
Separate cash flow, economic cost and wealth building.
Read article →Ranges and robust results
Test a decision through crossovers and scenario reversals rather than decimals.
Read article →TOOLS
Related calculators
Check refinancingInterest saving after term, fees and early repayment cost.→Repay or invest?Guaranteed interest saving versus uncertain after-tax return.→Loan calculatorPayment, interest, total cost and extra repayment.→Compound interestFuture value, contributions, gain and real purchasing power.→GLOSSARY