Payment timing
The lump sum is applied with the selected scheduled payment, so earlier payment numbers generally create more interest savings.
Principal prepayment
Mortgage Lump Sum Calculator Canada
Apply a lump sum at a selected payment and compare keeping the scheduled payment with recasting over the original remaining amortization.
Flexible payment timingKeep-payment strategyRecast-payment strategyInterest saved
Calculation inputs
Test one strategic principal reduction
Apply a lump sum at a selected payment and compare keeping the payment unchanged with recasting it over the original remaining amortization.
How the calculation works
Understand the formula before relying on the result
Keep-payment mode
The scheduled payment remains unchanged after principal is reduced, accelerating payoff and maximizing modeled amortization reduction.
Recast mode
The payment is recalculated after the lump sum using the original remaining periods, reducing required cash flow rather than maximizing speed.
Baseline comparison
Both strategies are compared with an otherwise identical schedule that has no lump sum.
Interpret the result
Timing creates leverage
A dollar paid earlier avoids interest for more future periods than the same dollar paid later.
Keep-payment favours debt reduction
This strategy generally produces the largest interest and time savings when the higher payment remains affordable.
Recast favours cash flow
A recast can lower payment while preserving the original payoff date, but many Canadian lenders do not offer automatic recasting.
Liquidity still matters
Mortgage principal is difficult to access again without a refinance, HELOC, sale, or readvanceable product.
Common mistakes
- Paying more than the annual privilege without checking penalty.
- Using all available cash and losing emergency liquidity.
- Assuming the lender will recast automatically.
- Ignoring higher-rate debts or near-term expenses.
- Treating constant-rate lifetime savings as guaranteed.
What lenders review
- Annual lump-sum percentage and anniversary rules.
- Minimum payment amount and permitted payment dates.
- Whether unused privilege carries forward.
- Open versus closed status and penalties.
- Recast, re-amortization, or payment-change options.
Planning tips
- Confirm the exact privilege before sending funds.
- Compare lump sum timing before and after renewal.
- Keep an emergency reserve after the payment.
- Use keep-payment mode when debt elimination is the priority.
- Request written confirmation of the new balance and payment.
Connected HopeWell knowledge
Connect the lump sum calculator to the mortgage decision
Use the result alongside HopeWell's guide chapters, glossary definitions, real underwriting case studies, service pages, and related calculators.
Calculation pathway
Related mortgage calculators
Continue into qualification, purchase costs, equity, refinancing, HELOC planning, and mortgage comparison using the connected calculators below.
Live
Extra Mortgage Payment Calculator
Measure how recurring extra payments change interest, payoff time, annual cash commitment, and renewal balance.
Live
Amortization Schedule Generator Canada
Generate annual and payment-level Canadian mortgage schedules and export the complete schedule to PDF or CSV.
Live
Mortgage Renewal Calculator Canada
Model renewal payment shock, lump sums, amortization choices, term interest, and the benefit of keeping a higher payment.
Live
Mortgage Payment Calculator Canada
Calculate payments, compare frequencies, model prepayments, review amortization schedules, and export a detailed PDF.
Live
Home Equity Calculator Canada
Estimate gross equity, accessible equity, sale equity, and secured borrowing room under multiple LTV assumptions.
Frequently asked questions
Questions about this calculation
When is the best time to make a lump sum?
Earlier generally saves more interest, but contract anniversary rules, penalties, liquidity, taxes, and other debts can change the best timing.
Will my mortgage payment decrease automatically?
Usually not. Many lenders keep the payment unchanged after a prepayment unless the product allows a formal recast or re-amortization.
What is a mortgage recast?
It recalculates payment using the reduced balance over the remaining amortization without necessarily changing the interest rate or maturity schedule.
Can I make a lump sum at renewal?
Often the mortgage can be paid down at maturity without a prepayment charge, but confirm the contract and lender process.
Is a lump sum better than investing?
That depends on after-tax returns, risk, liquidity, debt rates, time horizon, and personal objectives.