The engine that calculates, every payroll without errors
Ordinary payroll, extra pay, Social Security contributions and IRPF calculated automatically each month, with the payslip generated instantly.
- Automatic monthly calculation
- Social Security contributions
- Prorated extra pay
- Instant payslip
Payroll calculation · June 2026
+ Calculate payrollPayroll calculated
48/48
SS contributions
€21,4k
Total net
€74,9k
Payroll calculation, solved every month
The usual problems
Contributions by hand
Calculating Social Security bases and contributions in a spreadsheet, at risk of error on every payroll.
Extra pay that doesn't add up
Prorating extra pay month by month and throwing the calculation off when July or December arrives.
Variables every month
Overtime, supplements and allowances different each payroll, hard to track without a system.
Total dependence on the advisory firm
Waiting for the advisory firm to calculate each payroll before you can pay the team.
Scattered history
Not having each employee's payroll centralized or comparable across periods.
How Zynvio solves it
Monthly ordinary payroll
Calculate each employee's accrual, deductions and net pay every month.
Extra pay
Extra payments prorated into each month or paid separately, depending on each employee's collective agreement.
Social Security contributions
Employee and employer bases and contributions calculated automatically by contribution group.
IRPF and deductions
IRPF withholding and other deductions applied per worker, with accumulators updated.
Salary variables
Overtime, supplements, allowances and bonuses that feed into the calculation month by month.
Settlements
Calculation of the proportional part of extra pay and days worked in any settlement.
Automatic payslip
Generate the payslip as a PDF with the full breakdown, ready to hand to the employee.
History per employee
Every calculated payroll is saved and available to consult by employee and period.
Connect your tools via API
Payroll calculation draws on the employee's file and feeds your tax obligations, without duplicating data across modules.
- Takes the salary, contribution group and contract from the employee's HR record.
- The calculated IRPF withholdings feed the corresponding tax forms.
- Token API to export calculated payroll to other systems.
- Every payroll generated is reflected in accounting automatically.
Automate your workflows
The calculation runs on its own every month, without recalculating anything by hand.
- Automatic calculation of the ordinary payroll for the whole staff each month.
- Extra-pay proration applied according to each employee's configuration.
- Payslip generated and ready to hand over with no additional work.
- Contribution and IRPF accumulators updated with each calculation.
Who it's for
SME with in-house payroll
Calculate your payroll every month without relying on an external spreadsheet.
What you gain
Social Security contributions calculated without spreadsheets.
Extra pay always correctly prorated.
Less dependence on the advisory firm for each payroll.
Payslip ready instantly, every month.
Payroll history always at hand by employee.
Frequently asked questions
How does it calculate Social Security contributions?
From each employee's contribution group and salary, Zynvio automatically calculates the employee and employer bases and contributions on each payroll.
Can I include overtime and supplements each month?
Yes. You add the month's salary variables (overtime, allowances, supplements) and they feed into the ordinary payroll calculation.
How is extra pay calculated?
According to each employee's configuration: prorated into each month or calculated separately in the corresponding period.
How is this page different from HR and payroll?
HR and payroll covers full team management (employees, contracts, absences, employee portal). This page focuses only on the payroll calculation engine: contributions, IRPF, extra pay, variables and settlements.
Where do I check an employee's payroll history?
Every calculated payroll is saved and accessible by employee and period, with its full breakdown.
Explore more modules
Turn your operation into a connected system
Request a demo and see Zynvio in action.