Pennsylvania Sales Tax Audit Ultimate Guide

Why the Pennsylvania Department of Revenue Chose Your Business

The Data Triggers PA Uses to Select Audit Candidates

The Pennsylvania Department of Revenue does not audit randomly. They monitor sales tax returns and sometimes select businesses for an audit based on the patterns they identify. In my experience, the most frequent reason businesses are audited is because of an inconsistency in the control documents (federal income tax returns and 1099-K forms) and the sales tax returns. If there is a difference in the numbers reported in the control documents and sales tax returns, the department will discover the difference.

Exempt-sales ratios are another consistent audit trigger. Each business code contains expected ranges for tax-exempt sales. If your ratio is significantly different from the expected range, it will be examined. The Department reviews the "tax collected" line on your returns. If you collect sales tax from your customers, the Department will ensure that you remitted all of the sales tax. If there is a shortage, it will result in an audit.

For certain industries, for digital product companies specifically, PA uses what I would describe as a ripple-effect approach. They will audit a digital product vendor, and then reach into that vendor's supply chain to examine the vendors behind it. If your business is anywhere in that chain, you can receive an audit notice even if your own returns look clean.

Why Digital Product Sellers Face Elevated Risk in Pennsylvania

Pennsylvania broadly interprets its definition of digital products for tax purposes. Act 84 of 2016 removed any doubts about taxability of electronically delivered products. The Department's position is that all digital products are taxable, and it has made enforcement of this tax a priority. The Department considers all digital files, audio or video, apps, games, and other digital products to be taxable.

Under 61 Pa. Code § 60.19, canned software is taxable. License renewals for taxable canned software are also taxable. Custom software (coded and developed for a specific customer) is not taxable. The Department presumes canned software is taxable, and the burden is on the vendor to prove otherwise.

Documentation of end user location is a challenge for companies operating in multiple states. Determining how much of a sale is subject to PA tax is often the subject of audits. Typically, the lack of clean user location records leads the Department to make user location determinations, and those determinations have historically been adverse to the taxpayer.

PA DOR's interpretation of digital products is very broad. The Department has argued that sales not obviously "digital products" are still subject to the tax. Educational services sold through digital means, for example, would be subject to the sales tax according to PA DOR. Many companies unknowingly sell digital products the state taxes on audit.

Industries PA Auditors Target Most

My experience shows that auditors focus on specific industries for the Pennsylvania sales tax. These include industries with a high volume of exempt sales like software and other digital products, dining establishments, gas stations, construction, automotive, and lodging. Certain businesses in these industries also tend to have transactions of varying taxability. For example, a construction contractor may install sprinklers, which are taxable, and build a tax-exempt addition to a building. Auditors seek out issues in exactly this kind of mixed-taxability activity.

What Happens During a PA Sales Tax Audit and What Not to Do

What the Department Is Actually After

When the Pennsylvania Department of Revenue initiates a sales tax audit, it is to determine if a seller has underreported sales for tax purposes. It is the auditor's job to investigate whether a seller has collected tax but not remitted it to the Department, sold tax-exempt goods and services without properly supported exemptions, or otherwise not collected the full amount of tax that was due. Based on that analysis, the auditor prepares an assessment of additional tax that is almost always greater than the amount actually owed. Audit defense is the administrative and legal process of challenging that assessment and reducing the amount owed to the amount that is properly due.

Auditors examine business records including sales tax returns, the general ledger, point-of-sale records, bank records, and tax filings. They will review your exemption certificates to support exempt sales. If your business sells digital goods, the auditor will review records to confirm where the buyers are located. If you do not have the records to support your sales, the issues begin there. Providing answers to an auditor's questions without understanding the rationale behind them can also create issues.

The Biggest Mistake PA Business Owners Make

I've represented companies throughout Pennsylvania during the audit process. What I've seen repeated often is that taxpayers tend to over-cooperate. Taxpayers will call the auditor back the same day they received a call, and they tend to provide lengthy, full answers to each question, assuming the auditor is having a friendly conversation. That's not the case. Auditors ask questions in an effort to develop facts that support the conclusion the auditor wants to reach. Answering without understanding the purpose of the question is how a taxpayer concedes a position they didn't need to concede.

Do not allow access beyond legally required records. Do not provide documentation without a strategic plan for how to present it. The first steps in a PA sales tax audit dictate the rest, and the initial choices made in the audit greatly affect subsequent auditor decisions.

If you are represented by counsel from the opening contact, that dynamic changes. The auditor's questions go through someone who understands their purpose, and every record produced is part of a deliberate defense strategy. Businesses that engage experienced sales tax audit defense counsel early consistently reach better outcomes than those who handle the opening phase on their own.

For more on general audit defense strategy, the 5 Sales Tax Audit Defense Tips for Businesses guide covers the fundamentals.

Records PA Auditors Will Request

You will be asked to provide sales tax returns, financials, and copies of your sales journal and general ledger. You may be asked for bank statements, 1099-K forms, and federal income tax returns, as well as point-of-sale reports or other records reflecting sales transactions for the audit period.

You may also be asked to provide evidence for exempt transactions, including the exemption or resale certificate filed at the time of the transaction, and records evidencing your method of allocation for software and digital products. Exempt sales are usually reviewed on a sample basis.

Organization is key. A clean, well-organized document management system shows the Department of Revenue what it needs to see and reduces the opportunity for the Department to take an adverse position on your taxes.

The Resale Certificate Problem and Why It Costs Businesses So Much

What Makes a PA Resale Certificate Valid

Under 61 Pa. Code § 32.2, a resale or exemption certificate must be in a certain form before a seller can accept it. The certificate must be a copy of the form approved by the Department (REV-1220), or a reproduction that is legible and reasonably close to the size of the approved form. It must be completed and dated by the customer, and it must contain the seller's statement or evidence of exemption.

A common surprise to businesses is that the seller must obtain the certificate within 60 days of the date of the sale. At the time of an audit, a certificate obtained after the sale, even from a legitimate customer, is not acceptable.

A series of transactions between a seller and a customer may be covered by a single blanket certificate. However, issuing a blanket certificate does not protect the seller from the consequences of covering an illegal transaction. A seller must exercise good faith on each sale.

What PA Auditors Do With Invalid Certificates

A missing certificate, an undated certificate, or an incorrectly completed certificate is a denied exemption. Pennsylvania field auditors strictly enforce these requirements. Sellers must provide the required documentation to substantiate exemptions. The Department does not accept the burden of determining whether a sale was taxable. It presumes a sale was taxable unless the seller provides the required documentation to substantiate the exemption in accordance with 61 Pa. Code § 32.3.

For construction contractors and car dealers, resale certificate problems are especially expensive because the transactions are usually large. A few denied exemptions can add up to a six-figure assessment. For more on construction industry specific rules, the Pennsylvania sales and use tax guide for construction contractors covers the exemption structure in depth.

The Strategic Window: Appeal and BFR Flexibility

Certificate problems disallowed by PA auditors in the field are not always final. Issues can be resolved through the Board of Appeals, the Board of Finance and Revenue, and the administrative litigation process. I have seen numerous circumstances where cert issues that auditors considered defects were, in fact, resolved in support of the exemption.

This is a meaningful reason to pursue the appeal path rather than accept an audit assessment as final. The Pennsylvania IT Business Gets Mixed Results During Audit case illustrates how the BFR process played out for one digital business with documentation problems at the audit level. The result was mixed, but the process yielded a different outcome than the initial assessment, and that difference is what the appeal path is for.

Your Right to Appeal: Board of Appeals, BFR, and Commonwealth Court

You have the right to appeal any assessment issued by the Department of Revenue. Pennsylvania law provides a formal procedure to appeal such assessments before the Board of Appeals, the Board of Finance and Revenue, and the Pennsylvania Commonwealth Court. Each entity has the authority to change or reverse the assessment. Although most of the clients I represent do not appeal all the way to Commonwealth Court, understanding the entire process changes how an appeal is handled at the earlier, less formal appeal boards.

Step 1: Pennsylvania Board of Appeals (60-Day Deadline)

After receiving a final assessment from the Department, you have 60 days from the mailed notice date to file a petition with the Board of Appeals. This deadline was reduced from 90 days to 60 days by Act 43 of 2017. It is not a soft deadline. Miss it and the assessment becomes final and collectible. The Board of Appeals is an internal DOR review body, not an independent agency, but it does hear the substance of your dispute.

Your petition must state the legal and factual basis for your appeal and the relief you are seeking. Vague or incomplete petitions do not set you up well. A well-framed petition at the Board of Appeals stage builds the record for everything that follows.

Step 2: Board of Finance and Revenue (60-Day Deadline)

If your appeal is denied by the Board of Appeals, the next step is the Board of Finance and Revenue (BFR). The BFR is a separate Pennsylvania state agency from the Department of Revenue, and that independence matters for your case. You have 60 days from the date the Board of Appeals decision was mailed to file with the BFR.

The nature of proceedings at the BFR level provides greater opportunity to present your case in a more traditional litigation setting. The BFR is authorized to alter, reverse, or affirm an assessment made by the Department of Revenue, and it has the power to take evidence and compel testimony. BFR proceedings offer a chance to supplement the record and address shortcomings created during the audit. The number reached by the BFR and the assessment issued by the Department can differ substantially.

Step 3: Pennsylvania Commonwealth Court (30-Day Deadline)

After the Board of Finance and Revenue issues its order, the party affected may file an appeal before the Commonwealth Court of Pennsylvania within thirty days of the mailing date of the BFR order. This is the first step in the judicial process. Most cases end before they are heard by the Commonwealth Court, but if a case is heard, the Court reviews the full record.

Sales Tax Helper handles the full continuum: audit defense through the Board of Appeals, through BFR proceedings, through Commonwealth Court if needed. If you have received an assessment and are working through your options, contact Sales Tax Helper for a free consultation. For litigation-level representation at the BFR and Commonwealth Court, Sales Tax Legal handles the full controversy spectrum.

The Statute of Limitations and What It Means for Your Defense

How Far Back Can PA Go

Pennsylvania imposes a 3-year statute of limitations on the collection of unreported taxes. This period runs from the date a tax return was filed, or the date the tax liability was incurred, whichever is later. If no return was filed, the limitations period does not apply, and taxes can be assessed at any time. Tax fraud eliminates the limitations period entirely. Businesses with unfiled returns are in a materially worse position than businesses with returns filed on time.

The Waiver Trap

What most businesses miss: as you approach the end of the limitations period, the Department may ask you to sign a waiver extending the audit window. Signing that waiver eliminates the protection the statute would otherwise provide. Before signing any DOR extension request, speak with counsel about whether you have more to gain from letting the period close than from extending it. That is a strategic decision that depends on the specific facts of your case, and making it without advice is one of the more consequential mistakes I see.

Next Steps if You Have Received a PA Sales Tax Audit Notice

The Number on That Notice Is Not the Final Number

What the Department sends you is its opening position, not an indication of your actual liability. The audit process, the right to appeal, the BFR process, and a petition to the Commonwealth Court all exist precisely because the Department's opening number is often wrong, sometimes substantially. How close to the correct figure you get is contingent on how you handle the process from the opening notice forward.

What to Do Right Now

Do not respond to the Department on your own before speaking with someone who has handled PA sales tax audits. Do not produce records without a strategy. Do not sign any extension request without understanding what you are giving up. The first call to Sales Tax Helper costs you nothing, and the decisions you make in the first few weeks can determine the outcome.

Contact Sales Tax Helper or call (866) 458-7966 for a free consultation. We handle Pennsylvania sales tax audits, Board of Appeals proceedings, BFR litigation, and Commonwealth Court appeals.

Frequently Asked Questions

What causes Pennsylvania sales tax audits?

Pennsylvania sales tax audits are often triggered by discrepancies between reported sales and control documents (federal tax returns, 1099-K filings), or a high ratio of exempt sales. The Department may also be alerted by a variance between tax collected and tax remitted. Pennsylvania has recently stepped up auditing of digital product companies and will, similar to a sales tax nexus sweep, audit surrounding companies in a group when one company is audited.

How far back can the Pennsylvania Department of Revenue audit my business?

The Department can generally only audit a taxpayer's returns for the previous three years. If you do not file a return, that period stays open and the Department can audit it at any time. If fraud is suspected, the Department can also audit at any time regardless of when returns were filed. A business that files its returns on time is in a materially better position than one with unfiled periods.

Will there be issues if I don't have resale certificates?

In the absence of a valid resale certificate, auditors will disallow the exemption and impose tax on the full sale amount. The seller bears the burden of proving an exemption, and the auditor presumes the exemption does not apply without a certificate obtained within 60 days of the transaction. There are procedures to challenge a denied exemption before the Board of Appeals and the Board of Finance and Revenue, and these can help resolve the problem depending on the facts.

How do I challenge a PA sales tax assessment?

You have 60 days to appeal the assessment in writing to the Board of Appeals. Missing that deadline makes the assessment final and collectible. The same 60-day window applies to the Board of Finance and Revenue if the Board of Appeals denies your case. After the Board of Finance and Revenue issues its order, you have 30 days to appeal to the Pennsylvania Commonwealth Court.

What is the Board of Finance and Revenue?

The Board of Finance and Revenue (BFR) is an independent state agency responsible for hearing and deciding disputes over taxes administered by the Pennsylvania Department of Revenue. It reviews the record, conducts hearings when necessary, and has the authority to affirm, reverse, or modify a tax assessment. Many cases change materially between the audit level and the BFR level.

Can I correct resale certificate issues after the audit?

Sometimes. Resolving resale certificate deficiencies is generally the taxpayer's responsibility, but the process can be flexible depending on the circumstances, including whether the sale was genuinely exempt and whether supporting evidence exists beyond the certificate itself. This is worth pursuing at the Board of Appeals or BFR stage rather than accepting a denial as final.

Which businesses does Pennsylvania audit the most?

After Pennsylvania expanded its sales tax to cover certain electronic items under Act 84 of 2016, audits of software and digital product companies increased. Audits of restaurants and bars, gas and convenience stores, contractors, car dealers, and lodging businesses also increased. Convenience stores in particular face a mix of taxable items (like alcohol) and exempt items (like lottery tickets) on the same register tape, and owners need to be able to justify to the Department why sales tax was or was not charged on a given item, sometimes years after the sale.

What is the biggest mistake businesses make during a PA sales tax audit?

The biggest mistake is over-cooperating. Auditors ask specific questions to determine whether a business charged sales tax on an item that should have been taxed, and every answer a business owner gives helps the auditor build that case. Understanding the audit process before you start answering questions is what lets you represent the business effectively during the audit.

About the Author

The information in this article is for educational purposes only and does not constitute legal or tax advice. Consult a qualified sales tax attorney before taking action based on your specific situation.

Gerald J. "Jerry" Donnini II is a sales tax attorney and the founder of Sales Tax Helper, a national platform that helps businesses find, fix, and prevent sales tax exposure before it becomes a problem. Over a 15-year career, he has represented businesses in more than 5,000 sales tax audits, appeals, and disputes across 40+ states. He holds an LLM in Taxation from New York University, is co-author of a CCH treatise on state sales and use tax, and serves as an adjunct law professor. Jerry has saved businesses more than $500 million in sales tax assessments. His framework, Find It. Fix It. Defend It., guides businesses from initial nexus diagnosis through voluntary disclosure and, when necessary, full audit defense.