Accounting and tax advisory helps you make decisions with data, not only answer an isolated question. It can help you choose a tax regime, correct differences, prepare a filing, review deductions, understand obligations or decide whether your invoicing and collection process should change.
The difference between useful advisory and a superficial conversation is the outcome. When it ends, you should know what is correct, what is pending, what risk exists, what document is missing and what the next step is.
Accounting is not always tax
The accounting side looks at how operations are recorded: income, expenses, banks, CFDI, receivables, payables and financial statements. The tax side translates that information into obligations: ISR, VAT, withholdings, filings, deductions, acknowledgments and SAT compliance.
In practice, they intersect constantly. A wrongly issued CFDI is an accounting problem because it affects records, and a tax problem because it can change taxes, deductions or withholdings. A deposit without an invoice is a bank movement, but it can become a tax difference.
That is why accounting and tax advisory should review the full story: what happened, how it was documented, how it was filed and what evidence remains.
When to request advisory
Ask before deciding if:
- You are starting activities and do not know which regime to choose.
- Your income grew and RESICO may no longer fit.
- You work with legal-entity clients that withhold taxes.
- You are going to hire employees or formalize payroll.
- SAT shows differences, pending obligations or a negative compliance opinion.
- You need to file an annual or monthly return with several income types.
- You changed activity, address, partners or payment method.
It is also useful when everything seems fine but nobody has reviewed support. No SAT message does not automatically mean your accounting is in order.
What good advisory should include
Serious advisory does not start with a closed answer. It starts with questions. The advisor should understand your regime, activity, income flow, obligations, filing history and available documents.
A useful deliverable should include:
- Short diagnosis of the current situation.
- Detected risks and urgency level.
- Missing documents needed to conclude.
- Calculation or criterion used, when relevant.
- Main recommendation and alternatives.
- Action list by priority.
- Warnings about what should not be done without support.
If the advisory ends with "we will see later", it did not solve the problem. The goal is a clear path.
How to prepare
You do not need to send sensitive access data for an initial review. Prepare summarized information:
| Data point | Why it helps |
| Current tax regime | Determines obligations and calculations |
| Real activity | Validates whether the regime matches reality |
| Approximate income | Helps detect limits and obligations |
| Issued and received CFDI | Shows documentary consistency |
| Filed returns | Shows compliance and missing periods |
| Withholdings | Affects ISR, VAT and balances |
If your question is about an annual return, first review whether you must file. SAT keeps official information on who must file the annual return for individuals. For RESICO, monthly payments and specific assumptions also matter.
One-time advisory versus monthly support
One-time advisory is useful for a specific decision or issue. Monthly support prevents that issue from repeating. The difference is frequency, follow-up and ownership.
If you only need to download a certificate or understand one filing, advisory may be enough. If every month includes CFDI, banks, VAT, withholdings and operating decisions, you need a continuous accounting process.
At Fintax, advisory connects with operations: review data, define the path and keep support when the case requires recurring accounting.
FAQ
What is accounting and tax advisory?
It is professional guidance to understand accounting records, tax obligations, taxes, CFDI, filings and risks. It should end with concrete actions.
When do I need tax advisory?
When changing regimes, filing complex returns, responding to SAT differences, reviewing deductions, hiring staff or making decisions that affect taxes.
What documents should I prepare?
Tax status certificate, obligations, acknowledgments, CFDI, income summary, bank activity, withholdings and your main question. Do not share passwords or e.firma files through insecure channels.
Does advisory replace monthly accounting?
No. Advisory decides and guides; monthly accounting executes, reviews, keeps evidence and keeps obligations current.