Taxenda · for iPhone and iPad
Your month's ISR and IVA, from your own XML files.
Taxenda works out the monthly ISR and IVA of RESICO for individuals in Mexico from the CFDI XML files you already have. It also tells you when to pay and how much room is left under the 3.5 million limit.
Not on the App Store yet
Informational estimate. Not tax advice.
How it works
- Import your XMLChoose several XML files or a whole folder in Files, or open an email attachment with Taxenda. It reads the CFDI 4.0 invoices you issued and received and the payment complements, sorts them into months and shows what it read before anything is added.
- See your monthIncome without IVA and its rate, the month's ISR, the ISR your clients withheld and the ISR to pay. Below it the IVA: charged, withheld, paid on your expenses, and the IVA to pay or your balance in favor. You can also add an income or an expense by hand.
- Check the deadlineThe 17th, moved to the next business day, plus the extra business days for the sixth digit of your RFC. You pick them from a table: Taxenda doesn't ask for or keep your RFC.
- Mark the month and export the yearMark a month as declared, and export the year as CSV and PDF for your accountant from the Share sheet.
What is in it
The month's ISR and IVA
A card with the month's ISR to pay and IVA to pay, or your balance in favor, worked out from your XML files.
CFDI 4.0 XML files
Issued, received and payment complements. Choose several files or a whole folder, or open an email attachment.
The deadline
The 17th with the business day, and the extra days by RFC that you choose from a table.
The 3.5 million limit
How much is left of the RESICO limit and, from two months of data on, the month you would pass it at your current pace.
The year
Twelve months with their status: declared, pending or overdue.
Reminders
With reminders on and iOS notification permission, Taxenda notifies you 1, 3 or 7 days before the deadline and on the day itself.
CSV and PDF
Export the year for your accountant from the Share sheet.
Rules with sources
The 2026 rates and deadlines with their source and the date they were checked: LISR, RMF and CFF.
What it looks like
The screenshots use sample data.
The 2026 rates
Taxenda applies the rate of the row that matches the month's total income without IVA, not by brackets. The "Sources and rules" screen shows, for every rule, its norm, its publication and the date it was checked.
| Month's income without IVA | ISR rate |
|---|---|
| Up to $25,000.00 | 1.00% |
| Up to $50,000.00 | 1.10% |
| Up to $83,333.33 | 1.50% |
| Up to $208,333.33 | 2.00% |
| Up to $3,500,000.00 | 2.50% |
Source: Ley del Impuesto sobre la Renta (LISR), article 113-E. The 2026 rules were checked on 22 October 2026. Links to the texts of the norms open in your browser only when you tap them.
Your data stays with you
No account and no SAT password. Taxenda works without internet: no server, no sync. Your data stays on your device and in your own backup, and leaves only if you share an export yourself. It is free, with no purchases and no ads. Details are in the privacy policy.
Legal notice
Informational estimate based on published rates and deadlines (LISR, RMF and CFF; source and date in the app). Not tax advice and not a substitute for a public accountant (contador público). Taxenda doesn't file returns or make payments, and it is not affiliated with the SAT.
Last reviewed 23 October 2026