How CFOs Can Reduce Sales Tax Exposure Before an Audit Happens

Key Takeaways:

• Multi-state expansion creates sales tax exposure faster than many finance teams expect, especially when franchise growth and inventory movement overlap.
• The cheapest time to fix a sales tax problem is usually before a notice arrives, not after.
• A practical pre-audit framework should cover nexus, taxability, registrations, exemption documentation, and filing discipline.

For growth-minded companies, sales tax risk rarely shows up all at once. A new franchise location opens in one state, inventory shifts in another, and a marketplace channel starts creating revenue where no one expected a filing obligation.

That is why 2026 planning deserves more attention than usual. For businesses expanding across state lines, sales tax compliance is getting harder to manage through spreadsheets and “we’ll clean it up later” thinking.

Why Expansion Changes the Risk Equation

Opening in multiple states does more than increase revenue opportunity. It multiplies tax contact points. Physical locations, inventory storage, drop shipping, marketplace sales, direct ecommerce, and local registration rules can all create obligations at different times.

A finance team may focus on store opening dates while a state looks at first sales activity, stored inventory, payroll presence, or economic nexus thresholds. By the time an audit notice arrives, the issue is rarely just unpaid tax. It can also involve penalties, interest, registration gaps, and weak records.

The 2026 Pressure Points CFOs Should Watch

Not every state is changing in the same way, but a few pressure points are becoming more obvious as companies scale:

• More aggressive nexus enforcement as states compare filing records against marketplace, payroll, and business registration data
• Greater scrutiny of businesses operating across several sales channels with inconsistent reporting
• Higher audit risk when franchise growth outpaces back-office tax processes
• More exposure is tied to product taxability decisions that were made informally, then left unreviewed

None of that is exotic. It is ordinary growth friction.

A Practical Pre-Audit Review Should Cover Five Areas

The most useful reviews are not theoretical. They test how the business is actually operating now.

• Nexus 

Where has the business created an obligation to register and file? This should include:

• Franchise or store locations
• Inventory and fulfillment points
• Employee or contractor presence
• Revenue thresholds by state
• Marketplace and direct-channel activity

• Taxability

Many businesses assume their products or services are taxed the same way everywhere. They are not. CFOs should confirm whether any state-by-state taxability positions were made casually, inherited from software, or never reviewed at all.

• Registrations

A company may be registered where it should not be, unregistered where it should be, or registered under the wrong assumptions about how tax is collected. All three scenarios can create headaches.

• Documentation

Exemption certificates, resale records, internal support for tax decisions, and filing workpapers matter far more during an audit than they seem to during quarter-end. If the file is weak, the position is weak.

• Filing Discipline 

Late returns, zero returns that were skipped, and inconsistent frequency treatment can turn manageable issues into patterns that attract scrutiny.

What CFOs Can Do Before There Is a Notice

The best risk reduction work usually happens through routine discipline, not heroics:

1. Map every state where the company has sales, property, people, or franchise activity.
2. Reconcile that map against active registrations and filing calendars.
3. Review taxability assumptions for core revenue streams and any unusual transactions.
4. Test exemption and resale documentation for completeness, not just existence.
5. Identify historical gaps early enough to evaluate remediation options before a state contacts the business.

That last point matters. Once a state reaches out first, some cleanup options shrink fast.

Why Waiting for an Audit Is So Expensive 

Audit defense costs more than proactive review for a simple reason: the company is then working under pressure, with incomplete records and a clock running. Internal teams get pulled off normal work, and old assumptions harden into disputed positions.

Build an Escalation Process Before You Need One

CFOs do not need to personally review every sales tax issue. They do need a trigger system. When the business enters a new state, launches a new channel, changes fulfillment methods, or buys another operation, tax review should be part of the checklist.

Good escalation questions are simple:

• Did this create economic sales tax nexus in a new state?
• Did our product mix or taxability position change?
• Are exemption documents still valid?
• Do current filings still match how revenue is actually being earned?

If the answers are murky, that is the signal to investigate, not to defer.

What to Look for in Outside Specialist Support

When outside help is needed, CFOs should look for advisors who can do more than quote rules. The right support usually brings:

• Deep experience with state and local sales tax, not general tax knowledge alone
• Clear explanations of business risk, not just technical citations
• Responsiveness when issues are time-sensitive
• Experience with audits, remediation, and multi-state compliance strategy
• A practical approach to records, process fixes, and next-step prioritization

Final Thoughts

Sales tax exposure rarely becomes dangerous because one rule changed overnight. More often, it builds because the business expanded faster than its controls did.

The goal is early visibility, clean documentation, and a workable response plan before an audit notice forces the issue. Companies that review nexus, taxability, registrations, and filings now will be in a much stronger position later. And if outside support is needed, choose a specialist who can explain the risk plainly, move quickly, and help fix the right problems first.

Chanel Christoff Davis is a founding partner and CEO of the award-winning firm Davis Davis & Harmon LLC. Established in 2001, DDH is the largest woman and minority- owned sales tax advisory practice in the nation. 

Previously, she was a Senior Consultant at a Big 4 Firm and has conducted numerous financial statement and 401K plan audits within the technology, manufacturing, real estate, and not-for-profit industries. Chanel is a Board Member of the Women’s Business Council Southwest and the Women’s Business Executive National Council Forum. She is also a member of Delta Sigma Theta Sorority, The National Association of Black Accountants, and the Institute of Professionals in Taxation. In addition to managing DDH, Davis is a highly sought-after public speaker and the host of the podcast “Follow The Leader.