How Loan Interest Is Calculated: A Plain-Language Explanation
Loan interest is the cost of borrowing, calculated from the principal, the rate, and the time you hold the money.
Read guide →111 guides covering loans, credit, debt and mortgages in Canada. Every factual claim is attributed to an official source, and each page shows when it was last updated.
Loan interest is the cost of borrowing, calculated from the principal, the rate, and the time you hold the money.
Read guide →APR is the annual percentage rate: the yearly cost of borrowing, including interest and certain fees.
Read guide →In Canada, the standard spelling is instalment, with one l. Installment, with two, is the American form.
Read guide →A co-signer shares the loan and the payments; a guarantor only pays if the borrower defaults.
Read guide →A co-signer in Canada is legally on the hook for the full debt if the primary borrower stops paying.
Read guide →Some Canadian lenders can fund a loan within a day, while others take several.
Read guide →Loan approval in Canada often takes minutes to a few business days.
Read guide →A proper loan comparison means ranking offers by APR and total cost of credit, not by the advertised rate alone.
Read guide →For most Canadian borrowers, interest rate negotiation means asking for a lower rate with evidence, and success depends on your…
Read guide →Reading a loan agreement means checking total borrowing cost, every fee, and any clause that lets a lender change the deal.
Read guide →In Canada, a loan application moves from pre-qualification to document checks, underwriting, and funding.
Read guide →An online loan in Canada is applied for digitally and funded after checks.
Read guide →A prepayment penalty is a fee some lenders charge when you pay a loan off early or pay more than your contract allows.
Read guide →A small loan in Canada is a modest sum repaid over a set term.
Read guide →Government student loans are need-based, no-collateral public funding; private lending depends on credit.
Read guide →An emergency fund is money set aside for unexpected costs so you do not have to borrow.
Read guide →A budget is a plan for your money. Track what comes in and what goes out, set realistic categories and review it monthly so it…
Read guide →Bank fees are common, but many are avoidable. Match your account package to your habits, meet waiver conditions, and ask your…
Read guide →A small business loan is money borrowed to fund a business and repaid with interest over an agreed term.
Read guide →A term loan gives you a lump sum repaid on a fixed schedule, while a line of credit gives you a limit you can draw on, repay and…
Read guide →A personal guarantee is a promise to repay a business debt if the business does not.
Read guide →Government financing programs usually work through lenders rather than lending directly.
Read guide →Business credit is a separate file from your personal credit score and works differently.
Read guide →Equipment financing lets Canadian businesses acquire equipment without paying the full cost upfront.
Read guide →Invoice factoring turns unpaid invoices into cash; a loan advances funds you repay.
Read guide →Legitimate lenders disclose costs in writing and never promise approval.
Read guide →Rebuilding credit in Canada means fixing report errors, paying on time and lowering balances.
Read guide →A Canadian credit report lists your accounts, payment history and inquiries from Equifax Canada and TransUnion Canada.
Read guide →Your Canadian credit score is shaped by payment history, how much of your available credit you use, how long your accounts have…
Read guide →A hard credit check happens when a lender assesses an application and may affect your score.
Read guide →You can dispute a credit report error in Canada for free. Under PIPEDA you have the right to access your file and ask the bureau…
Read guide →A balance transfer card moves existing debt onto a new card at a low promotional rate.
Read guide →A credit alert flags your credit file so lenders verify your identity before new credit is issued.
Read guide →Your credit score is a three-digit rating, generally 300–900 in Canada, that lenders use to judge lending risk.
Read guide →Most negative items stay on a Canadian credit report for a set period.
Read guide →You can check your credit score and report in Canada for free, directly from a national credit bureau.
Read guide →Strengthen your credit score before a mortgage by fixing report errors, lowering balances and paying on time.
Read guide →A hard credit inquiry stays on your Canadian credit report for a set period.
Read guide →A line of credit usually costs less for ongoing borrowing; a credit card wins on convenience.
Read guide →A secured credit card is a deposit-backed card that reports to Canada's credit bureaus, so responsible use can build or rebuild…
Read guide →The payday loan cycle repeats when one repayment leaves a gap that the next loan fills.
Read guide →Debt consolidation combines several debts into one payment, usually to lower the interest you pay or simplify your budget.
Read guide →A consumer proposal is a negotiated settlement with your creditors. A bankruptcy is a formal assignment of assets.
Read guide →Credit counselling is usually non-profit and focuses on budgeting and a repayment plan.
Read guide →Consolidating credit card debt means replacing several card balances with one payment.
Read guide →A debt-to-income ratio compares your regular debt payments with your gross income.
Read guide →The order you pay off debts can change how much interest you pay and how long it takes.
Read guide →Debt repayment is a choice: clear the highest interest first (avalanche) or the smallest balance first (snowball).
Read guide →Your debt level is too high when payments crowd out essentials, ratios exceed lending thresholds, or you borrow to cover basics.
Read guide →Creditor negotiation in Canada means asking a creditor to accept a revised payment plan or settlement when you cannot pay in…
Read guide →The limitation period on most Canadian debts is set by provincial law, so where you live decides how long a creditor can sue you.
Read guide →Wage garnishment is a legal process that lets a creditor collect money from your pay.
Read guide →Defaulting on a loan in Canada triggers collections contact, credit-report damage and possibly legal action.
Read guide →A home equity line of credit lets you borrow against the equity in your home, usually at a lower rate than unsecured credit.
Read guide →A HELOC is a revolving line of credit, while a home equity loan is a lump sum repaid in fixed instalments.
Read guide →Home equity can consolidate high interest debt into one lower cost payment, but it turns unsecured debt into secured debt.
Read guide →Secured borrowing uses an asset, often your home, as collateral in exchange for a lower rate.
Read guide →A fixed mortgage keeps your payment steady for the term, while a variable mortgage moves with the lender prime rate.
Read guide →How much you can afford is not the same as the maximum a lender will approve.
Read guide →A mortgage pre-approval tells you roughly how much a lender would lend and often holds a rate for a set period.
Read guide →The federal minimum down payment is tiered by purchase price, and any down payment below 20% means the mortgage must be insured.
Read guide →The mortgage stress test requires federally regulated lenders to qualify you at a rate higher than your contract rate.
Read guide →A mortgage renewal is when your term ends and you choose new terms and a new rate.
Read guide →Closing costs are the fees and taxes you pay around the purchase of a home, on top of the down payment.
Read guide →Mortgage rate offers vary by province due to local competition, rules, taxes and housing markets.
Read guide →Your down payment can come from savings, gifts, or eligible assistance.
Read guide →Mortgage eligibility rests on income, debts, credit, down payment and the property — not the headline rate.
Read guide →Each mortgage payment is split between interest, which the lender keeps, and principal, which cuts your balance.
Read guide →Mortgage insurance protects the lender if a high-ratio borrower defaults.
Read guide →Mortgage penalty is the prepayment charge for breaking a closed mortgage early.
Read guide →Compare a mortgage quote on three things first: the interest rate, the term length, and the penalty and fee structure.
Read guide →A mortgage term is your current contract length; amortization is the total time to repay the loan.
Read guide →Refinancing a mortgage swaps your loan for a new one, often to cut your rate or tap equity.
Read guide →Rent to own is a lease with an option to buy later, but the lease and the purchase are separate contracts.
Read guide →Your mortgage payment depends on the loan amount, rate, amortization and payment frequency.
Read guide →A personal loan gives you a lump sum you repay in fixed instalments.
Read guide →A personal loan pays you a lump sum with fixed instalments, while a line of credit lets you draw funds as needed.
Read guide →How much you can borrow depends on your income, debts, credit history, and any collateral.
Read guide →A fixed rate locks your payment for the term, while a variable rate can move with the market.
Read guide →A secured loan is tied to an asset the lender can claim if you default; an unsecured loan is not.
Read guide →A promissory note is a written promise by one party to pay a sum of money to another on demand or at a specified time.
Read guide →A promissory note is a simple unconditional promise to pay, while a loan agreement sets out the full terms of a loan.
Read guide →A promissory note can be legally binding in Canada when it meets the Bills of Exchange Act and contract law.
Read guide →If a promissory note is unpaid, the holder may demand payment, sue, or enforce judgment.
Read guide →Write a promissory note in Canada with a signed, unconditional promise to pay a set sum, plus parties, date and terms.
Read guide →Promissory note interest in Canada follows the note's terms, capped by the criminal rate of interest.
Read guide →A promissory note is a signed, unconditional promise to pay a set sum, while an IOU only acknowledges that a debt exists.
Read guide →An instalment loan is repaid in scheduled payments over months, while a payday loan is a single lump-sum repayment, usually…
Read guide →An instalment loan gives you a lump sum that you repay in scheduled payments over a set term.
Read guide →Since 1 January 2025, payday loans in provinces with a payday regime are capped at $14 per $100 borrowed, with a $20…
Read guide →Payday loans carry the highest cost of almost any consumer credit.
Read guide →When an urgent cost lands, the cheapest option is usually the one you already have.
Read guide →A consumer complaint about a payday lender starts with the lender, then escalates to a provincial regulator or federal agency.
Read guide →A cash advance is credit-card cash with interest from the transaction date.
Read guide →Act before the due date: contact your lender, ask about a repayment plan, and know your provincial rules.
Read guide →CRA quarterly tax instalments are advance payments due four times a year, on March 15, June 15, September 15 and December 15.
Read guide →You may have to pay CRA tax instalments if your net tax owing is more than $3,000 for 2026 and in either 2025 or 2024.
Read guide →To calculate CRA tax instalments you can use the no-calculation, prior-year or current-year option.
Read guide →CRA instalment interest applies when your payments are late or too low.
Read guide →A CRA instalment reminder (INNS1) shows what you owe in quarterly tax prepayments and offers three calculation options.
Read guide →You can make a CRA tax instalment payment online, by phone or at your bank by each quarterly due date.
Read guide →CRA tax instalments can be reduced or stopped when income drops, but you must update your estimate and ask the CRA to…
Read guide →Tax taken at source can miss side income, investments, or multiple jobs.
Read guide →Tax instalments are quarterly CRA prepayments based on net tax owing.
Read guide →Car financing in Canada usually comes from a dealership, a bank or a credit union, and the total cost depends on the rate, the…
Read guide →Car loan term length is the number of months you take to repay, and it shapes both your monthly payment and your total interest.
Read guide →Dealer financing is arranged at the dealership, while a bank or credit union loan is arranged directly with the lender.
Read guide →Used car financing works like any car loan, but the vehicle history and condition matter more because they affect the lender…
Read guide →Ideally, a car loan refinance lowers your interest cost or monthly payment; it can also backfire by stretching your term or…
Read guide →Thin or empty credit files are common, and they do not automatically disqualify you from a car loan in Canada.
Read guide →Selling works if the car is worth more than the car loan; refinancing lowers the payment; surrender is a last resort.
Read guide →Promissory.ca is not a lender, bank, mortgage broker or credit counsellor. We do not make lending decisions and we do not charge you a fee to use this service.
Submitting an application does not guarantee approval. All applications, rates and terms are set and approved solely by the individual lender or licensed professional.
Rates, fees and loan amounts vary by lender, province, loan type and your credit profile. Advertised rates are the lender's lowest offered rate and may not be available to you.
Lenders may perform a credit check with one or more credit bureaus, including Equifax and TransUnion. A hard credit inquiry may affect your credit score.
There is no obligation to accept any offer presented to you. Review every agreement carefully before signing.
Borrow only what you can reasonably afford to repay. Late or missed payments may result in additional fees, collection activity and negative credit reporting.
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If you are struggling with debt, consider contacting a non-profit credit counselling service or a Licensed Insolvency Trustee before borrowing more.