Custom Mortgage & Home Loan Calculator Development for Lenders and Brokers

Build powerful, branded mortgage and home loan calculators that engage customers and generate high-quality leads.

At Lumen Business Solutions, we design and develop custom financial calculator development for banks, brokers, and financial institutions. Our calculators integrate seamlessly with your website, CRM, and lead capture systems—empowering you to provide accurate, interactive tools that drive trust and conversions.

Require Urgent Response?

We understand your Excel project may require urgent attention. Here's how we can help:

Same-Day or Next-Day Assessment

Our Excel Experts will meet with you promptly—often the same or next day—to diagnose the issue.

Quick Turnaround

Expect swift, effective solutions to get your project back on track.

Why Lenders Need a Custom Mortgage Calculator

Every successful lender understands the power of transparency. Customers expect to calculate repayments instantly, explore different loan options, and trust your numbers. A tailored calculator does more than crunch figures—it becomes a lead-generation engine.

Benefits include:

Increase visitor engagement and conversion rates
Build credibility through transparent loan data
Capture qualified leads with integrated CRM forms
Enhance SEO with interactive, high-value content
Offer personalized results for better user experience

Types of Financial Calculators We Build

We specialize in creating calculators across the full lending lifecycle:

Home Loan & Mortgage Calculators

Formula Correction, Repair Broken Excel and Improve Aesthetics.

Refinance & Offset Calculators

For functionality: Modify sheets for better performance and utility.

Affordability & Eligibility Calculators

Streamline repetitive processes within Excel.

Interest Rate Comparison Tools

Connect Excel sheets with databases and other data sources.

Debt Reduction & Extra Payment Calculators

Tailored solutions for both large enterprises and SMEs.

All calculators are custom-designed, fully responsive, and white-labeled to match your brand identity.

Custom-Built for Integration and Performance

We build calculators that fit perfectly into your digital ecosystem—no generic templates, no compromises.

Our solutions include:

Seamless CRM integration (Zoho, Salesforce, HubSpot)
API connections for real-time data updates
Secure cloud hosting and compliance alignment
Mobile-first design for all devices
Dynamic reporting dashboards for lead tracking

Embed or Integrate — Your Choice

Our calculators can be:

Embedded directly on your website (WordPress, Wix, Webflow, custom CMS)

Connected through API or iframe for dynamic loan data

Hosted as a standalone web app under your domain

Technical Expertise That Delivers

With over 20 years in CRM, automation, and financial systems, Lumen Business Solutions delivers robust, scalable tools that perform flawlessly.

We specialize in:

Front-end frameworks: React, Vue, and JavaScript

Back-end integration: Zoho Creator, Python, .NET, Java

Excel-to-web migration for existing loan models

Data validation, security, and NZISM compliance

Your Custom Calculator Creation in 5 Stages

A Testimonial to the Quality of our Services

I engaged Lumen to undertake some work on a pricing spreadsheet which required computation far beyond my Excel abilities.

Lumen jumped on a call with me and not only listened to exactly what I required but made suggestions on how the sheet could be improved even further.

The finished product was received a couple of days later, and it functioned exactly as I had intended it to. Overall, I was very impressed with the service, quality of the work and suggestions provided.

www.wonkybox.nz

Hi Lumen Team ,

Thank you both for “dropping everything” to help me solve my problem, Josh, you did it, and blazingly fast too.

Words are insufficient to voice our deep appreciation. We are amazed to receive such professional quality help, so fast and with such a deep sense of empathy and understanding.

Gentlemen, I used to teach four types of exchange:
1. No exchange (rip-off)
2. Poor Exchange (some value but not to the expected standards)
3. Fair Exchange (expected level of service and quality) 4. Exchange in Abundance (Better than expected quality, service, care, etc.)

Most businesses operate on the 3rd type of exchange, however only the 4th type guarantees growth and long term survival. Well done on your superlative service.

The label macro is working perfectly and we’ve almost caught up the backlog.

Many Thanks,
Terry Le Sueur - Director

NFL Foods Limited

Lumen have been extremely easy to work with, great communicators, solution focussed and highly professional throughout the process. I would confidently recommend Lumen to any business.

We found value in how Lumen talked through our needs and how to best come to the solution we wanted Quick turn arounds and back and forths.

Why Choose Lumen Business Solutions

20+ years in financial software and CRM integration

Proven success with banks, brokers, and enterprise lenders

Fast delivery and end-to-end development in-house

NZ & AU based — trusted by financial professionals

Compliance-ready and built for performance

Our Comprehensive Excel Services for Businesses of All Sizes

Lumen Business Solutions: New Zealand's Excel Consultant

Get a Custom Mortgage Calculator for Your Website

Ready to attract more customers and generate qualified leads? We’ll design a bespoke home loan or mortgage calculator that fits your brand, integrates with your CRM, and delivers measurable results.