How Legacy Systems Become the ‘Pennies’ of M&A Tech Due Diligence

When Your Old Code Costs More Than Spare Change

When tech companies merge, you need to look under the hood. Let me show you why how a company handles its legacy systems – those digital relics still chugging along – can make or break an M&A deal. Think of it like those pennies jingling in your pocket: seemingly insignificant, but revealing when you examine them closely.

Pennies and Legacy Code: Surprising Twins

After twelve years of tech due diligence work, I’ve noticed companies cling to outdated systems like we cling to pennies. Here’s why:

• Maintenance Overload: Pennies cost more to make than they’re worth. Outdated systems drain cash through constant patching
• Patchwork Solutions: Stores use penny-rounding hacks – just like the digital duct tape companies apply to aging code
• Walking Knowledge: Valuable pre-1982 pennies disappear into collections, just like system expertise walks out the door with retiring staff

4 Make-or-Break Checks in Tech Due Diligence

1. Code Quality: What’s Your Tech Made Of?

Pennies switched from copper to zinc in 1982 – and got cheaper. Tech systems degrade similarly. In one acquisition, we found this ticking time bomb:

/* Legacy currency function - untouched since Y2K panic */
function calculateChange(total) {
return Math.floor(total * 100) / 100; // Always rounds down
}

This sneaky rounding trick saved fractions of a cent per transaction… until we calculated the class-action lawsuit risk: $4.7 million. That’s why we comb through every line.

2. Can Your Systems Actually Grow?

When Canada killed pennies, retailers adapted to 5-cent rounding. We check if tech stacks can:

• Handle 10x more transactions overnight
• Adjust to regional rules (Australian rounding differs from Canada’s)
• Support modern payment methods

Last month, we found a retail platform that couldn’t handle Australian rounding rules – killing a $20M expansion plan before it started.

3. Hidden Risks: The Zinc Effect

Modern pennies corrode faster than old copper ones. Tech decays too:

We once found an e-commerce site running Windows Server 2003 – a digital time bomb with 147 known security holes.

4. Have You Planned the Funeral?

Australia eliminated coins successfully with:

1. A hard sunset date
2. Store system updates
3. Bank partnerships

We look for similar tech retirement plans:

• Clear legacy system shutdown dates
• Data migration blueprints
• Training budgets for new tools

Warning Signs vs. Welcome Mat

Red Flags (Run Away)

These make us reach for the brakes:

• “Some clients still use IE6” (actual quote from last week)
• Over 30% of code untouched since Obama’s first term
• Manual testing for payment systems

Green Lights (Proceed)

These get our approval:

• Automated legacy detection tools
• Technical debt tracked like financial debt
• Regular “code archaeology” digs

Your M&A Tech Checklist

Here’s what we inspect in every audit:

1. List all systems older than your smartphone
2. Compare patching costs vs replacement
3. Match tribal knowledge to aging systems
4. Check compliance risks (PCI, GDPR, etc)
5. … [custom items based on your tech stack]

The Bottom Line: Don’t Inherit Rust

Like pennies in circulation, legacy systems accumulate. What matters is how companies handle them. Through rigorous tech due diligence, we help turn what looks like small change into billion-dollar decisions. The targets actively modernizing their “digital pennies”? They consistently sell for 20-30% premiums. Because in tech M&A, copper-core foundations always outshine zinc-coated quick fixes.

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