How Voluntary Disclosure Agreements Cap Back-Liability for Consulting Firms With Retroactive Nexus Exposure

What a Voluntary Disclosure Agreement Actually Does

A VDA is a negotiated agreement between your business and a state's tax authority. You voluntarily disclose that you have (or may have) an unfiled tax obligation. In return, the state offers concessions it would not extend if it discovered you through an audit. The core terms are consistent across most states:

• Shortened lookback period: Instead of assessing tax for the full statute of limitations (or the entire period of nexus), the state limits its review to a defined window — typically 3–4 prior years.
• Penalty waiver: Most states waive all late-filing and late-payment penalties. Given that penalties in many states run 10–25% of the tax owed, this concession alone can be worth tens of thousands of dollars.
• Interest reduction or waiver: Some states waive or reduce interest, though this is less common. New York and California generally require full interest payment; Washington has more flexibility.
• Forward compliance commitment: You agree to register, begin collecting and remitting tax, and file returns going forward. The VDA is not a one-time fix — it establishes an ongoing obligation.

The critical prerequisite: you must not have been contacted by the state about the tax type in question. If the state has already sent a nexus questionnaire, audit notice, or assessment letter, VDA eligibility is typically forfeited. This is why firms that discover retroactive nexus exposure should act promptly rather than waiting to see if the state notices.

Which States Offer VDAs for Sales Tax — and Their Terms

Five states are most relevant for consulting firms with significant client revenue: New York, Illinois, California, Washington, and Texas. All five have formal VDA programs, but the terms differ meaningfully.

The VDA programs in Florida, Georgia, and Arizona follow similar structures, though consulting firms generate less sales tax exposure in those states because professional services are broadly exempt.

The Lookback Period: 3–4 Years vs. the Full Statute of Limitations

The lookback period limitation is the single most valuable feature of a VDA. Here is why it matters for a consulting firm:

Without a VDA, if a state discovers through audit that you should have been collecting sales tax, it can assess tax for the entire period covered by the statute of limitations. For a firm that never filed, the statute may not have started running at all — meaning the state could theoretically assess tax for the entire period of nexus. Some states have a "discovery rule" that extends the limitation period to 6–7 years for non-filers. New York, for example, has no statute of limitations for unfiled returns in certain circumstances.

For a consulting firm that has had nexus in New York for 6 years but only files a VDA now, the VDA saves it from 3 additional years of assessment. If annual taxable sales averaged $50,000 and New York's combined state and local rate is approximately 8%, that is $4,000/year in tax — and the VDA saves $12,000 in tax alone for those 3 excluded years, plus all penalties on the full 6-year period.

Which Consulting Services Are Actually Taxable?

This is the question that determines whether a VDA produces a five-figure payment or a $0 liability. Most states do not tax professional consulting services for sales tax purposes — but the definitions vary, and the boundaries are less clear than consulting firms typically assume.

The pattern is clear: a traditional management consulting or strategy firm selling advice, reports, and recommendations will likely have minimal or zero sales tax liability in all three states. But a consulting firm that also sells data analytics platforms, licensed software, or bundled technology services may have significant taxable revenue in New York — and increasingly in Illinois.

This is why the VDA process is valuable even when the expected tax liability is small. The formal determination of service taxability, made in cooperation with the state, creates a documented position that protects against future audit recharacterization.

The VDA Application Process: From Anonymous Contact to Signed Agreement

Every state with a formal VDA program follows a similar workflow. Here is the general sequence:

The anonymous pre-application is the safety valve. It allows firms to assess their exposure without committing to disclosure. If the state's terms are unfavorable, or if the analysis reveals that your services are not taxable in that state, you can walk away with no consequences.

Worked Example: $400K Consulting Agency Estimating Multi-State Exposure

Consider a management and technology consulting firm based in Georgia with $400,000 in annual revenue. The firm has clients in New York (35% of revenue, or $140,000) and Illinois (20% of revenue, or $80,000). It crossed New York's $500,000/100-transaction dual threshold in its third year of operation (when cumulative NY revenue exceeded the combined test) and Illinois's $100,000 or 200-transaction threshold in its first year. The firm has been operating for 5 years without registering in either state.

Two things stand out in this example. First, the firm's actual sales tax exposure is much smaller than its total revenue suggests — $16,840 on $400,000 in annual revenue — because most consulting services are exempt. Second, the VDA savings come primarily from New York's lookback limitation, not Illinois. A firm with this profile should prioritize the New York VDA and may choose to simply register in Illinois going forward given the modest back-liability.

Income Tax vs. Sales Tax VDAs: A Distinction Consulting Firms Cannot Ignore

Consulting firms have a unique nexus profile that product sellers do not: they frequently create income tax nexus through employee travel, remote workers, and on-site project delivery. A consultant spending 30 days at a client site in New York may create corporate income tax nexus for the firm even if the economic nexus lookback period for sales tax has not been met.

Income tax VDAs and sales tax VDAs are separate programs in most states. A consulting firm may need to file both. The good news: when you disclose for both tax types simultaneously, states generally apply the same lookback period and penalty waiver terms to both. The bad news: income tax liability is typically larger than sales tax liability for consulting firms, because income tax applies to net income from all services delivered in the state, not just taxable services.

If your firm has consultants who travel to client sites, work remotely from multiple states, or deliver projects on-site, discuss income tax nexus with your tax advisor alongside the sales tax VDA analysis. Addressing only one tax type while ignoring the other leaves the remaining exposure fully intact — and the state may use the sales tax registration to flag your business for an income tax audit.

When to File a VDA vs. When to Simply Register Going Forward

Not every retroactive nexus exposure warrants a VDA. The decision depends on the size of the back-liability relative to the cost and complexity of the VDA process.

The $400K consulting firm in the example above falls clearly into VDA territory for New York (savings of ~$16,000 vs. professional fees of ~$3,000–$5,000) but is borderline for Illinois (savings of ~$450 vs. professional fees). A reasonable approach: file the New York VDA, and simply register in Illinois going forward while voluntarily paying the modest back-liability.