The 2026 Economic Package doesn’t bring just technical tweaks—it brings structural changes that will force accountants and tax consultants to rethink how we structure costs, reconciliations and compliance strategies for our clients.
We’ve identified 4 critical areas that will have an immediate impact starting January 1, 2026. This guide breaks down each change with practical examples and specific actions to implement before the end of Q1.
1. IEPS: Increases That Break Operating Margins
The Numbers That Matter
Beverages with added sugar:
- From $1.65/L → $3.08/L (+87%)
Beverages with sweeteners (light/zero):
- From $0 → $1.50/L (new obligation)
Tobacco:
- Ad valorem rate: 160% → 200%
- Duty per cigarette: $0.64 → $0.85 (+$4.14 per pack)
Gaming and betting:
- Rate: 30% → 50% (+67%)
- Online gaming: New rate of 50%
Practical Cases
Mid-sized bottler (10,000 L/month):
Monthly impact: +$14,367
Annual impact: +$172,404
Someone has to absorb this cost: the company, the distributor or the consumer.
Restaurant with a bar (500 L/month):
Regular sodas: +$431/month
Light sodas: +$300/month (previously exempt)
Annual total: +$8,772
Betting house ($500K/month in revenue):
Monthly impact: +$100,000
Annual impact: +$1,200,000
Strategic Question
Is it worth reformulating products to pay $1.50/L instead of $3.08/L?
Potential savings: $1.58/liter For 100,000 L/month: $1,896,000 in annual tax savings
But reformulation has costs: development, testing, production-line changes, relaunch campaigns. The ROI depends on volumes and demand elasticity.
Immediate Actions (Before January 31)
✅ Recalculate cost structure with the new IEPS duties
✅ Review contracts with suppliers and distributors
✅ Project the impact on working capital and inventories
✅ Evaluate pricing and margin strategy
✅ Consider a product reformulation analysis
2. Withholding on Digital Platforms: The New Mandatory Compliance
What’s Changing
Starting January 2026, digital platforms (Mercado Libre, Amazon, delivery apps) must mandatorily withhold:
IVA:
- 50% if the seller has an RFC
- 100% if they don’t have an RFC or are foreign
ISR:
- 4% (legal entity with an RFC)
- 20% (without an RFC or foreign)
The April 1 Risk
If platforms don’t deliver tax information in real time, the SAT can shut them down operationally.
This turns compliance from “recommended” to “if you don’t do it, you’re out of the market.”
Cash Flow Impact
Mercado Libre seller ($100K/month):
Total invoiced: $116,000
Withholdings:
- IVA (50%): $8,000
- ISR (4%): $4,000
Total withheld: $12,000
Actual deposit: $104,000
The problem: You invoiced $116K but only receive $104K. You have to recover the $12K withheld through crediting on your monthly return.
If your margin is 20% ($20K), the $12K withheld represents 60% of your monthly profit temporarily frozen.
Foreign seller without an RFC:
Sale: $50,000
Total withholdings: $18,000 (31% of the total)
Without an RFC in Mexico, you cannot recover these withholdings. You lose 31% permanently or you have to regularize your tax status.
Immediate Actions
✅ Tax data validation:
- Confirm an up-to-date RFC on all platforms
- Verify a current Certificate of Tax Status (Constancia de Situación Fiscal)
- Validate that banking details match the RFC
✅ Accounting preparation:
- Create accounts: “IVA withheld by platforms” and “ISR withheld by platforms”
- Reconciliation template: Sales → Withholdings → Deposits
- Monthly crediting procedure
✅ Financial projection:
- Recalculate cash flow expecting 10-15% fewer deposits
- Evaluate the need for an additional line of credit
- Adjust collection projections
3. Federal Tax Code: Higher Surcharges, Automatic Auditing
New Surcharge Rates
Surcharge rates rise to as much as 1.63% monthly (previously: 1.11% on average).
Increase: +32%
Real Comparison
IVA not paid on time ($50,000 for 30 days):
2025: $50,000 × 1.11% = $555
2026: $50,000 × 1.47% = $735
Difference: +$180 (+32%)
ISR deferred 3 months ($100,000):
2025: $100,000 × 3.33% = $3,330
2026: $100,000 × 4.41% = $4,410
Difference: +$1,080
Automatic Auditing: The SAT’s 3 Cross-Checks
The SAT will carry out automatic electronic reviews by cross-referencing:
- CFDI ↔ Returns
Discrepancies >3% = automatic review - Returns ↔ Banks
Deposits > declared income = immediate observation - Supplier CFDIs ↔ Accounting
Deductions from EFOS/EDOS = rejection + fine
The change: Before, this took months. Now the reviews are automatic, with notification via Buzón Tributario within days.
The True Cost of Deferring Payments
SME that historically pays 20 days late:
Monthly taxes: $230,000 (ISR + IVA)
2025 cost: $1,702/month = $20,424/year
2026 cost: $2,254/month = $27,048/year
Increase: +$6,624 per year
But if there are inconsistencies:
- Fine for inconsistency: $3,000-$9,000
- Surcharges on the fine: additional
- Real cost: $34,000+ per year
Conclusion: It is NO longer cheaper than bank financing (15-18% per year) and it exposes you to the risk of seizure.
2025 Regularization Program
Critical change: Threshold expanded from 35 million pesos → 300 million pesos in income
Benefits:
- 100% forgiveness of fines, surcharges and enforcement costs
- You only pay the updated principal tax
- Up to 6 installments
- Suspension of the enforcement procedure
Deadline: September 30, 2026
Requirements:
- NOT having received forgiveness under the 2000, 2007 or 2013 programs
- No sentence for tax crimes
- NOT being on the EFOS/EDOS lists (arts. 69-B and 69-B Bis)
Immediate Actions
✅ Preventive audit:
- Cross-check CFDI vs. returns
- Validate suppliers against the updated 69-B list
- Confirm that deductions are 100% supported
✅ Regularization assessment:
- Check outstanding balances on the SAT Portal
- Calculate the benefit of forgiveness
- Prepare the application if you qualify
✅ Strategic decision:
- Compare: cost of surcharges vs. a line of credit
- Stop using deferral as a liquidity strategy
- Implement on-time payment with formal financing
4. Macroeconomic Impact: Revenue and Fiscal Pressure
The Government’s Numbers
Projected revenue from IEPS: +$136,994 million pesos (0.35% of GDP)
Total revenue expected from IEPS 2026: $761,500 million pesos
What It Means for Your Practice
The government is going to chase those numbers with:
- More aggressive auditing
- Less tolerance for errors
- Faster collection processes
- Mass electronic reviews
Practical translation:
The margins for error are shrinking. Companies that historically “fixed” inconsistencies afterward will no longer have that time. The SAT will detect, notify and collect within weeks, not months.
Impact on Your Professional Practice
These changes will generate immediate demand for:
a) Cost-structure reviews in Q1
Especially clients in food, beverages, retail, restaurants, distribution and gaming.
b) Updating contracts with digital platforms
Any client with e-commerce sales needs an urgent review.
c) Changes to reconciliation processes
New accounting accounts, crediting procedures, withholding controls.
d) Preventive audits
Before the SAT arrives with automatic reviews.
Checklist: Actions by Week
Week of January 6-10
✅ Identify clients in industries affected by IEPS
✅ Calculate the specific impact per client
✅ Validate clients’ tax data on digital platforms
Week of January 13-17
✅ Update charts of accounts
✅ Create reconciliation templates for withholdings
✅ Train the team on the new crediting mechanics
Week of January 20-24
✅ Review client contracts (suppliers, distributors, platforms)
✅ Project the cash flow impact per client
✅ Evaluate needs for additional financing
Week of January 27-31
✅ Perform a preventive audit: CFDI vs. returns vs. banks
✅ Validate suppliers against the updated 69-B list
✅ Prepare an action plan for February (the first return under the new rules)
Resources and Next Steps
Over the coming days we’ll publish specific technical guides for each of these 4 topics:
Day 2: IEPS - How to recalculate margins when your inputs rise by up to 87%
Day 3: Digital platforms - Practical cases of withholding and cash flow
Day 4: CFF - Cost analysis: surcharges vs. bank financing
Day 5: Complete implementation checklist with downloadable templates
About Tablia
At Tablia we develop automated tax-compliance technology for Mexican SMEs. Our goal is to make tax compliance stop being the hidden enemy of companies and become a transparent, predictable and manageable process.
If you need tools to:
- Automate bank and CFDI reconciliations
- Process withholdings from digital platforms
- Maintain traceability across CFDI ↔ accounting ↔ banks
- Generate real-time tax position reports
Learn more about our solutions at tablia.mx
Share this analysis with fellow accountants, CFOs and tax consultants.
The 2026 Economic Package is not “just one more tweak”—it’s a structural change in how the SAT audits and how much noncompliance costs.
The professionals who understand these changes now and implement them correctly in January-February will differentiate themselves massively from those who wait until March to react.
Because in March you won’t be advising anymore—you’ll be putting out fires.
Last updated: December 2025
Sources: Diario Oficial de la Federación, Cámara de Diputados, SAT, Secretaría de Hacienda
