When many business owners receive a notice of a tax audit, their first reaction is often: “Am I being targeted?” or “Why is the tax authority singling me out?”

To be honest—the tax authorities simply don’t have the resources to target anyone specifically. Auditing accounts is time-consuming and labor-intensive, and it also increases the workload for frontline staff. But why do they still come knocking? BecauseAs soon as the system alert sounds, the verification process must be initiated.... It's not a matter of “whether or not to check,” but rather “the regulations require that we check.”

If an early warning remains in the system and cannot be cleared, it will become a priority item and stay on the system until the matter is fully verified. It’s not that the tax authorities won’t let you off the hook—it’s that big data won’t let you hide.

I. Just how “smart” is the current Golden Tax System?

Many business owners are still stuck in the outdated mindset that “as long as the invoice is in order, everything is fine.”

The current Golden Tax System has integrated data from dozens of agencies, including banks, the Administration for Market Regulation, social security, customs, housing authorities, electric utilities, and water utilities. It no longer relies solely on your tax return, but instead takes into accountInvoice flow, cash flow, goods flow, employment data, energy consumption dataCross-reference everything.

How much income did you report? How many invoices did you issue? How much money was deposited into your business account? How much inventory is in your warehouse? How many employees do you have? How much electricity do you use each month? — The system can instantly verify whether the logic adds up.

One set of data illustrates this clearly: In the first quarter of 2025, the number of companies flagged as abnormal by the national tax audit system surged by 3,10% year-over-year. Of these, more than 60% were automatically identified and flagged by the system due to “discrepancies in purchase, sales, and inventory logic.”

It wasn't because someone reported you, nor was it because an administrator singled you out; it was simply that when the system was running its data checks, it detected that the numbers for your household were off and automatically flagged them in red.

II. These are the pitfalls most likely to trigger big data alerts

Many companies are investigated not because they intentionally seek to evade taxes, but because their financial practices are non-compliant—they cross the line without even realizing it. The following situations are strong warning signs.

1. Discrepancies between inventory, sales, and purchases result in the highest rate of on-site audits

Mismatches between purchase volume, sales volume, and inventory levels are the most common cause of warning signals.

For example, if you received 1,000 units of inventory and sold 800 units, your book inventory should show 200 units remaining, but the actual reported figures and inventory data differ significantly; or if the product categories you’re selling don’t match the categories you purchased at all, the system will immediately flag the discrepancy.

Here are two real-life examples:

• At a gas station in Nanhai, Foshan, an analysis of tax big data revealed significant discrepancies in purchase, sales, and inventory data, with the actual scale of operations severely mismatching the reported revenue, leading to the immediate initiation of an investigation.
• At a trading company in Qingdao, the recorded purchase volumes, remaining inventory levels, and reported sales figures did not match at all, and the figures were logically inconsistent; as a result, the inspection team immediately initiated an audit.

Many small, medium, and micro-sized enterprises have chaotic inventory management practices—purchases aren’t recorded in the inventory system, and sales aren’t posted to the books. While this may seem fine in the short term, once the data accumulates, the system can spot the discrepancies at a glance.

2. Mismatch between water and electricity bills, energy consumption, and production capacity

You say you have high production volume and sales, but your monthly electricity bill is so low—the system can tell right away that something’s off.

The Golden Tax system has now incorporated operational data such as electricity and water consumption and employment figures into its monitoring system. Many regions have established direct connections with data from electric and water utilities, using energy consumption to estimate your actual production capacity and then comparing it with your reported income.

There’s a textile company in Tianmen, Hubei, whose annual electricity consumption, when calculated, would allow it to produce no more than 4.73 million meters of white greige fabric at most. Yet the company reported 51.24 million meters—a discrepancy of more than 10 times the actual amount. If not them, then who should be investigated?

There was also a property management company in Guangdong where there was a long-standing discrepancy between electricity purchase and sales figures—with the difference reaching as high as several dozen times—which was also accurately detected by the system.

Some business owners think they’re being clever by deliberately inflating their utility bills to cover up problems. But the system performs multidimensional cross-checks—if you adjust the electricity costs but the rent, labor, and raw materials don’t match, it still doesn’t make sense and actually raises more suspicion.

3. Commingling of public and private accounts; abnormal cash flows

This is the pitfall that many small and medium-sized enterprises and sole proprietors are most likely to fall into.

Customer payments go directly into the boss’s personal account, and purchases are also paid for via personal accounts. For a long time, no invoices have been issued and no income has been reported. Do you think the bank and the tax authorities don’t share data? They’ve been linked for quite some time now.

Large deposits into personal accounts, frequent transfers from business to personal accounts, rapid inflows and outflows of funds, and large transactions during non-business hours at night—all of these will be flagged by banks and automatically reported to the tax authorities.

Cross-border e-commerce business owners, in particular—who receive foreign payments into personal accounts and have chaotic foreign exchange settlement processes—are subject to especially close scrutiny.

4. Discrepancies between salary, social security contributions, and personal income tax

Reporting an employee’s salary as 5,000 yuan to avoid taxes—paying social insurance based on the minimum contribution base and filing a zero personal income tax return—used to be a common practice, but now authorities catch every single case.

The system performs direct comparisons: when your company’s reported total payroll, social insurance contribution base, and individual income tax withholding base are cross-checked, any significant discrepancies trigger an immediate alert. Furthermore, practices such as falsely reporting employee wages or using invoices to offset wages are all exposed by big data.

III. What Should You Do When You Encounter a Big Data Alert?

First of all:An early warning does not equate to a penalty, and an anomaly does not equate to a violation.The

An alert is essentially the system raising a question: “This data seems a bit unusual—is it reasonable?” As long as you can provide a reasonable explanation, complete supporting documentation, and present a logical argument, the alert will be cleared, and there won’t be any issues.

What’s truly dangerous is being unable to provide an explanation or supporting evidence—and even panicking when questioned, scrambling to fabricate or alter information, which only makes matters worse.

Here are a few practical tips for everyone:

1. First, conduct a self-inspection to identify any anomalies. When you receive an alert notification, don’t rush to ask someone to pull strings. First, refer to the alert instructions and go through all the relevant accounts, receipts, contracts, transaction records, and inventory in/out slips on your own to figure out exactly where the discrepancy lies.
2. Prepare a complete chain of evidence For example, for discrepancies in inventory, sales, and purchases, you must provide complete documentation such as incoming and outgoing goods slips, inventory count sheets, and explanations of losses; for energy consumption discrepancies, you must provide supporting documentation such as records of equipment maintenance, production halts, and outsourced processing.Let the evidence speak for itself; don't just offer empty explanations.The
3. Cooperate fully; do not withhold any information. The more you resist or delay, the more likely you are to attract close scrutiny. Provide the requested information and explain the situation truthfully; many minor issues can actually be resolved simply by offering a clear explanation.
4. If you can't figure it out on your own, ask a professional for help. Especially when it comes to historical issues, cross-border transactions, and complex accounting matters, don’t try to handle them on your own. Professional finance and tax specialists can help you organize your evidence and present your case clearly, preventing minor issues from escalating due to a slip of the tongue or submitting the wrong documents.

Finally, let me say something from the heart

We are no longer in the era when “audits relied on people and tax evasion relied on concealment.” With big data, business operations are virtually transparent.

Compliance isn’t a cost—it’s a bottom line. The small amount of tax you save today by cutting corners could result in fines and late payment penalties several times that amount tomorrow, not to mention damage to your company’s credit rating. It simply isn’t worth it.

This is especially true for industries such as cross-border e-commerce, trade, and manufacturing—which involve long supply chains and frequent financial transactions—where it’s even more important to establish proper standards in advance. Don’t wait until an alert pops up before you think about plugging the holes.

If you find this helpful, feel free to bookmark it and share it with friends who run companies or businesses. When it comes to compliance, an extra reminder can help you avoid pitfalls.