Codium Logo Codium Logo
  • Services
  • Industries
  • Our Work
  • About
  • Blog
Blog · Finance

Everyone in the office has a different copy of the loan calculator

The calculator started as one spreadsheet. Now there are nine versions on nine laptops, a few of them wrong, and nobody is sure which one a particular quote came from.

14 March 2024

Somewhere in your finance business there is a spreadsheet that works out repayments, fees, commissions or interest. Someone capable built it years ago and it was right. Then it was emailed to a new starter who adjusted a rate. Someone else added a tab for a new product. The original author left. Today there is a copy on every laptop, each one slightly different, and the quote a client receives depends on which copy the broker opened.

We hear this from brokers, lenders and advisers all the time, and it is hardly ever described as a software problem. People say "we need to get everyone on the same version". The problem is that a spreadsheet does not have a same version. Every copy that gets emailed is a new branch.

What it costs

  • Quotes that do not match. Two brokers quote the same client and get different figures. The client notices before you do.
  • Rates that lag. A lender changes a rate. The master copy gets updated. Half the office is still working from last month's file.
  • No record of what was quoted. A client disputes a figure a year later. The spreadsheet has been overwritten a hundred times since then and there is nothing to show what they were told.
  • Compliance that relies on trust. If a regulator asks how a figure was calculated, the honest answer is "whichever version the broker had open that day".

Containing it

You can slow the drift down before rebuilding anything.

  • One master, locked. Keep the calculator in one shared location, protect the formula cells, and make the rate table the only thing anyone is allowed to edit.
  • Put a version number on the front sheet. Change it every time the rates change, so an old copy is obvious at a glance.
  • Save the output, not the file. Export every quote to PDF and attach it to the client record, so there is a record of what was said regardless of what happens to the spreadsheet afterwards.

These work for a small office with a disciplined manager. They stop working once there are more than a handful of products, more than a handful of people, or a second location.

What the alternative looks like

Businesses that fix this permanently stop treating the calculator as a file and build it into their system. The rates live in one place and one person changes them. Every broker uses the same calculation because there is only one. Every quote is saved against the client with its inputs and outputs, so it can be reproduced exactly a year later. The documents, from the quote through to the application forms, are generated from the same data.

That is what we built for Chase Finance: a broker CRM with the loan calculators built in, along with dynamic PDF generation and reporting for the internal checks and follow-ups that used to live in people's heads, such as balloon payments and settlements coming due. The Excel calculators that everyone had a different copy of were retired.

A calculator on its own is a small build. It is a good place to start because it is the part of a finance business where a wrong number costs the most, and the part where a shared system proves its worth fastest. Once the calculator is in the system, the CRM, the forms and the reporting usually follow, because the data they need is already there.

If your office is running on nine versions of one spreadsheet, have a look at what we build for finance businesses, or tell us where the numbers get re-keyed and we will talk it through.

Finance 2024
Keep reading

More from the blog

Has your business outgrown Excel? Seven signs, and what to do about each one
15 Oct 2026

Has your business outgrown Excel? Seven signs, and what to do about each one

Spreadsheets fail slowly, so nobody notices the day they stop being a tool and start being the system. Here are the signs, the fix...

What has changed in custom software development over the last 12 months
2 Sep 2026

What has changed in custom software development over the last 12 months

Software development continues to evolve quickly, but the last 12 months have seen some particularly significant changes in the wa...

How do you know which asset is about to fail before it does?
30 Jul 2026

How do you know which asset is about to fail before it does?

The failure was there in the data for three inspections before the breakdown. Nobody could see it because the data was spread acro...

All articles

Want to talk about your own project?

Tell us what's slowing your business down. One of our digital strategists will talk it through with you.

Get in touch Call 1300 887 103
Codium Logo
Codium Pty Ltd.
Ground Floor, 207 Greenhill Road
Eastwood, 5063
Adelaide, South Australia
  • 1300 887 103
  • sales@codium.com.au

Development

  • Software Development
  • Mobile Apps
  • Software Integration
  • Hardware Integration
  • Microsoft Access
  • Replace Spreadsheets

Managed Services

  • Software Takeover
  • Software Support (SLA)
  • Managed Hosting
  • Private AI Hosting
  • On-Premise AI

AI

  • AI for Business
  • AI Reporting

Strategy

  • Technology Partner
  • UI / UX Design
  • Due Diligence (M&A)
  • Why Projects Succeed
  • What Software Costs

Technologies

  • PHP · Laravel
  • JavaScript · Vue.js
  • AWS

Company

  • About Us
  • Industries
  • Our Work
  • Blog
  • Careers
  • Contact Us
  • Customer Feedback
  • Remote Support

© Codium Pty Ltd. All Rights Reserved.

  • Terms of Business
  • Privacy Policy
  • Quality Policy
  • Security Policy
  • Customer Experience Charter
Back Top
Codium
Services
All services Strategy
  • Technology Partner
  • UI / UX Design
  • Technology Due Diligence
  • Why Projects Succeed
  • What Software Costs
Development
  • Software Development
  • Mobile App Development
  • Software Integration
  • Hardware Integration
  • Microsoft Access Databases
  • Replace Spreadsheets
Managed services
  • Software Takeover
  • Software Support (SLA)
  • Managed Hosting
  • Private AI Hosting
  • On-Premise AI
AI
  • AI for Business
  • AI Reporting
Industries
All industries
  • Construction
  • Finance
  • Government
  • Health
  • Insurance
  • Manufacturing
  • Mining
  • Retail & E-commerce
  • Transport & Logistics
Our Work About Blog
Get in touch Call 1300 887 103