Why Employer Contributions Are Billed One Month After Salary Payment?
Employer contributions from one payroll month appear on the following month’s invoice. This timing also explains why final-month contributions can be billed after an employee leaves.
Your invoice reflects the actual employer contribution costs (social security, pension, statutory insurance, and similar statutory costs) confirmed during the previous month's payroll, not an estimate for the current month.
The Employer Burden includes statutory contributions and employer-paid taxes based on an employee’s gross income. Examples of these contributions include social security, unemployment benefits, and healthcare insurance. In some cases, additional costs like group insurance premiums may also be included.
This one-month shift applies only to the employer contribution portion of your invoice. Employee gross salary and other charges continue to be invoiced on their existing monthly cycle.
As a country-specific example, in Mexico, employer contributions include statutory contributions such as social security (IMSS), housing fund contributions (INFONAVIT), state payroll taxes, and retirement savings (SAR). These costs are calculated based on the employee’s actual taxable earnings for a given month.
Example timeline:
June — Payroll is processed and actual employer contributions for June are confirmed
July — Your invoice includes June's actual employer contributions
Each invoice includes two main components:
Gross income for the current month.
Employer Burden for the previous month, clearly labeled with its applicable payroll period.
Why We Bill This Way
✅ Accuracy Your invoice reflects exactly what was paid and not an estimate. This eliminates discrepancies, so you're never over- or under-charged for employer contributions.
✅ Fewer adjustments Because we bill based on confirmed actuals, there's far less need for correction invoices or reconciliation adjustments to your account.
✅ Cash flow benefit You pay actual costs after they're confirmed, rather than paying upfront based on projections , giving you more control over payroll budgeting.
Additionally, this model ensures that invoices reflect actual payroll data rather than estimates, improving transparency and accuracy.
What This Means in Practice
Factors That May Cause Employer Burden to Fluctuate
Variable Income: Bonuses, commissions, or other additional compensation increase the taxable base, leading to higher employer contributions.
Statutory Rate Changes: Government-mandated contribution rates may change, affecting the Employer Burden from the effective date onward.
Retroactive Adjustments: Back pay or corrections for prior periods can temporarily increase the Employer Burden.
Annual Updates: Adjustments to salary caps or contribution bases, such as the Maximum Contribution Base for social security, can increase the Employer Burden.
New hires
The first invoice for a newly onboarded employee will not include employer contributions. It shows only the employee's estimated gross income, plus any applicable benefits or financial charges. Employer contributions appear on the following month's invoice, once the first payroll has been processed and actuals are confirmed.
Offboarded employees
A final invoice will be issued the month after an employee's last working day. This covers the confirmed employer contributions for their final working month, plus any remaining salary adjustments. In some cases, an invoice may reflect only the employer burden and any remaining prior-month items, such as approved expenses. This typically happens when there are no other charges, such as salaries or bonuses, for the invoiced month.
Employer Burden is calculated on the prorated taxable income for the days worked. Standard statutory rates are applied, and the result is billed in the subsequent month.
FAQs
Will my total costs change?
No. Your total costs stay the same — you're simply paying confirmed actuals instead of estimates, with a one-month timing shift on the employer contribution portion of your invoice.
Does this affect my entire invoice, or just part of it?
Just the employer contribution portion. Gross salary, benefits, and other charges continue to be invoiced on their existing schedule.
Are my invoices more or less predictable?
More predictable for employer contributions, since they reflect confirmed costs with no estimation variance. Minor variability may still occur on the salary side, due to mid-month changes such as unpaid leave or attendance adjustments.
Can I get a forecast of expected employer contributions?
Yes, Support can provide estimated contribution rates by country to support your internal budgeting.
You can also view a detailed breakdown of Employer Burden in the platform’s Report tab. For additional details, check the employee’s payslip in the Documents tab.
Why might an invoice include only the employer burden?
If Employer Burden is missing from the current invoice, it will appear on the next month’s invoice, reflecting the prior month’s payroll data.
In some cases, an invoice may reflect only the employer burden and any remaining prior-month items, such as approved expenses. This typically happens when there are no other charges, such as salaries or bonuses, for the invoiced month.