Implement mortgage calculator with amortization schedule

[nanaf6203-bit]

Problem

MortgageCalculatorModule exists but may only compute basic monthly payments. Missing: amortization schedule, PMI, tax/insurance integration, scenario comparison.

Expected Outcome

Full-featured mortgage calculator with amortization schedule.

Acceptance Criteria

• Monthly payment calculation
• Amortization schedule (month-by-month)
• PMI when down payment < 20%
• Property tax and insurance included
• Scenario comparison
• Export as PDF/CSV

Files Affected

src/mortgage-calculator/mortgage-calculator.service.ts, src/mortgage-calculator/mortgage-calculator.controller.ts

Difficulty

Medium

Estimated Effort

Medium (1 week)

Labels

feature, mortgage, calculator

[monique-7arch]

@monique-7arch has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hello, I'd like to pick this issue up.

I'm a full-stack developer with solid experience in modern JavaScript/TypeScript, REST APIs, and frontend frameworks like React. I enjoy working in open source and following existing project conventions.

I've gone through the details of this issue and I'm confident I can deliver a clean, well-tested solution that fits the codebase.

Please assign this issue to me, I'd be happy to contribute.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @monique-7arch to this issue.

[drips-wave]

Congratulations, @monique-7arch! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @monique-7arch: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊

[drips-wave]

This issue has been completed by @monique-7arch as part of the Stellar Wave Program's 7th Wave 🥳

😎 @monique-7arch: You earned 200 Points for completing this issue! After the current Wave ends, you'll be eligible for a percentage of the Wave's reward pool based on the percentage of total points you've earned. Learn more here. You can also Leave a review to share your experience working on this issue.

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