Plan your mortgage.
See what you could save.
Enter your mortgage details, select prepayments, then view the savings and repayment schedule in Results.
Mortgage details
Update these figures any time your balance or terms change.
Your selected payment frequency determines the payment dates used in the projection.
Advanced options · bank posting dates
Bank posting dates are estimates and may affect interest and which allowance period receives a payment. Confirm actual bank rules and observed holidays with your lender.
Annual prepayment allowance
Protect your penalty-free annual limit.
One-time lump sums
Add as many dated lump-sum prepayments as you need.
Recurring extra prepayments
Choose any day of the month, or weekly, biweekly and semi-monthly extras. Add schedules to change amounts or take breaks.
Your savings and repayment analysis
See exactly how your planned prepayments change interest, principal and your balance through maturity.
Interest saved by maturity
Adjust your prepayments below to calculate savings.
Allowance check
| Allowance period | Planned | Left |
|---|
Includes planned lump sums, all recurring extras, and the amount already used. The full planned schedule is checked conservatively, even if payoff happens early.
Principal breakdown
See the impact of your prepayments
Each bar represents payments and accrued interest in a projection year. Tap a bar for amounts.
Cumulative savings compare all selected prepayments against the same mortgage with regular payments only.
Current term comparison
| Mortgage metric | No extras | With extras |
|---|
Total interest accrued includes accrued interest that may not yet have been collected in a regular payment by maturity.
Where every dollar goes
See how your selected lump sums and recurring extras change principal and interest over time.
Calendar-year totals up to maturity. Expand a year to see its months.
All projected posting dates, including your selected prepayments. The savings column shows total avoided interest as of each date.
| Posting date | Type | Paid | Interest paid | Principal paid | Cumulative saved | Balance after |
|---|
Estimates through the current mortgage maturity only, not the full original amortization. Results may differ from your bank's statement.
Explore more possibilities
Advanced planning tools are here when you need them. Your everyday inputs stay in Plan.
Target balance at maturity
Estimate an additional monthly amount or lump sum to reach a target, while respecting the allowance.
Your saved scenarios
Save alternatives and compare up to three plans. Everything stays on this device.
Compare up to 3 saved plans
Choose the Compare checkbox on any two or three saved scenarios to see them side by side.
To move scenarios to another phone or computer, export a backup and import it on the other device. There is no cloud account or automatic cross-device synchronization.
Help and information
Understand calculations, revisit the disclaimer, and review what changed in each version.
Using Mortgage Studio
- In Plan, enter the mortgage principal, interest rate, payment frequency, and maturity date.
- Enter penalty-free allowances and any lump sums or recurring extra payments.
- In Results, confirm the plan passes the allowance check, then review interest saved and balances.
- In Tools, set a target balance or compare saved plans.
Tap a ? icon beside a section for a short explanation and what changing it affects.
Estimates and lender rules
The results are for planning only, not a lender statement or payoff quote. Calculations stop at your selected current-term maturity date and use a Canadian semiannual compounding approximation. Actual bank rules vary.
Version history
v1.4Guided navigation & visual analytics
Four-tab navigation, improved expandable yearly/monthly/payment schedule, period and cumulative interest savings, interactive balance / payment composition / cumulative savings charts, help popups, payoff indicator, version history, printable report, and a subtle results disclaimer.
v1.3Flexible prepayment planning
Day 1–31 and last-day selectors, target balance, saved-plan comparisons, separate/shared allowances, banking-day adjustments, new recurring frequencies, multi-year summaries and detailed ledger.
v1.2Payment schedule choices
Monthly, semi-monthly, biweekly, accelerated biweekly, weekly, and accelerated weekly regular payment types; streamlined input flow and first-launch planning disclaimer.
v1.1Android compatibility
Corrected the original APK startup bytecode defect and raised the Android target SDK.
v1.0Initial release
Mortgage balance projections, lump sums and monthly extras, annual allowance checks, scenario saving, and CSV export.
Backup and restore
Saved plans remain on this device. Export a backup before changing phones or uninstalling the app.