What is the SDI?
The integrated daily salary is your daily salary plus the proportional share of benefits such as aguinaldo and vacation premium. It is used for IMSS contributions and dismissal severance.
How it is calculated
Integration factor = 1 + (aguinaldo days + vacation days x vacation premium) / 365. SDI = daily salary x factor.
Contribution cap
IMSS contributions are capped at 25 UMA per day. With the 2026 UMA that is $2,932.75.
Frequently asked questions
What is the factor with minimum legal benefits?
With 15 aguinaldo days, 12 vacation days and a 25% premium, the factor is 1.0493.
What other benefits raise it?
Fixed bonuses, food vouchers and other regular benefits may be included.
What is the SDI for?
IMSS contributions and severance.
Is it an official figure?
No, it is an informational estimate.