If you manage payroll with Nominasol and have ever had to reconcile monthly social security contributions, you know the process involves more steps than it first appears: calculating contributions, generating files for the General Treasury of Social Security (TGSS), submitting withholding tax forms to the Tax Agency and making sure every figure matches to the cent. Nominasol, the payroll software by DELSOL — now part of the TeamSystem group — automates a large part of this cycle. In this article we explain how that integration works, which Social Security tools are involved and where a specialist can help when the process gets complicated.
What is Nominasol and what type of company is it designed for
Nominasol is the payroll and social security management solution from Software del Sol (DELSOL), the Spanish company that TeamSystem acquired in February 2021 and that is today the group's flagship product in Spain for the SME and accounting-firm segment. The programme runs exclusively on Windows and is aimed at two main profiles: labour consultancies that manage payroll for multiple client companies, and HR departments of SMEs that prefer to handle personnel management in-house.
Its main features include payroll calculation covering all current collective agreements, contract management and Social Security registrations and deregistrations, automatic personal income tax (IRPF) calculation, payslip generation and, of particular relevance, direct connectivity with the TGSS and Tax Agency (AEAT) electronic systems.
The Social Security connection: SILTRA and NS Conect@
The core of Nominasol's integration with Social Security revolves around two official TGSS channels: SILTRA and NS Conect@. Understanding the difference between them is essential to avoid errors in the monthly contribution cycle.
SILTRA: the channel for contribution files
SILTRA (Sistema de Liquidación Directa) is the application the TGSS provides to companies and advisory firms for exchanging contribution files. Through SILTRA, FAN (affiliation) and CRA (contribution) files are submitted, and the contribution calculations that the Treasury returns for confirmation before payment are received.
Nominasol natively generates files in the formats SILTRA accepts. The typical workflow is as follows:
- Monthly payrolls are calculated in Nominasol.
- The programme generates the contribution file with the bases and contributions by contingency type (common, professional, unemployment, FOGASA, vocational training).
- That file is imported into SILTRA and submitted to the TGSS.
- The TGSS returns the official calculation, which the user confirms or corrects before proceeding to payment by direct debit.
The deadline for submitting the social security settlement is the last working day of each calendar month for companies with more than 10 employees on the payroll. For others, the deadline may extend to the first few days of the following month depending on the scheme and payment method.
NS Conect@: real-time affiliation communications
NS Conect@ is the TGSS service for processing affiliation communications in real time: registrations, deregistrations and changes to workers' data. Nominasol allows these communications to be submitted directly from the worker's record, without the need to log into the Social Security portal manually.
This is especially useful for advisory firms with many clients: when a company reports a new hire or a voluntary resignation, the firm can submit the registration or deregistration in the General Scheme directly from Nominasol, reducing the risk of errors and response times.
Tax forms: the 111 and the 190
In addition to Social Security, payroll management requires submitting IRPF withholdings to the AEAT. Nominasol also covers this part of the cycle by automatically generating the two key forms:
| Form | Frequency | What it declares | Usual deadline |
|---|---|---|---|
| Form 111 | Quarterly (monthly for large companies) | Withholdings and payments on account on employment income, business activities and prizes | From the 1st to the 20th of the month following each quarter (January, April, July, October) |
| Form 190 | Annual (summary) | Annual summary of withholdings and payments on account: recipients, amounts, withholdings and nature of income | From 1 to 31 January of the following year |
Nominasol automatically calculates each employee's withholding rate based on their personal circumstances (marital status, children, disability, home purchase loans, etc.) and adjusts it whenever there is a relevant change during the year. At the end of each quarter, the programme generates the Form 111 file in XML format ready to be imported into the AEAT Electronic Office or submitted via batch presentation if several clients are being managed.
Form 190 is generated in January with the full-year cumulative data. It is the document that feeds the draft income tax returns of each employee, so its accuracy is critical: an error in the income allocation or the recipient's data can lead to AEAT inquiries and corrections to employees' tax returns.
Other forms and procedures covered by Nominasol
Beyond the 111 and 190, Nominasol also covers:
- Rental withholding forms (115/180) when the company pays rent on premises.
- Withholding certificates to be provided to employees before 31 January.
- Data communication to the payer (Form 145): the programme manages the forms that employees submit to update their withholding rate.
- Temporary incapacity management: sick-leave certificates are integrated into the payroll calculation so that the benefits paid directly by Social Security or the mutual insurance company are correctly deducted.
- Contrat@: although contract notifications to the SEPE are submitted through the Ministry of Labour's Contrat@ system, Nominasol stores the contract data and facilitates printing the required documents.
When automation is not enough: the value of specialist support
Nominasol automates a great deal, but there are situations where the software alone does not solve the problem. The most common scenarios we encounter in the implementations we manage are:
- Uncommon or recently updated collective agreements that are not included in the programme's agreement table and must be configured manually.
- Multiple employment or multiple activity situations where calculating the contribution base becomes complex because the worker contributes to several companies simultaneously.
- SILTRA file errors returned by the TGSS with an error code that require interpreting the technical message and correcting the data in the worker's record.
- Software updates that change menus or procedures and create uncertainty for the team using the programme daily.
- Migrations from another payroll software (for example, from Wolters Kluwer's a3nom or from a previous programme) where the cumulative history must be imported to avoid losing current-year IRPF data.
At Summum Sistemas we have been supporting SMEs and advisory firms in the implementation and support of management software since 2007. As an Official TeamSystem Partner, we offer direct support on Nominasol: from the initial setup of the company and its collective agreements to resolving incidents with SILTRA or NS Conect@. If you need help with Nominasol, visit our Nominasol implementation and support service page.
Nominasol within the DELSOL / TeamSystem ecosystem
A real advantage of Nominasol is its native integration with the rest of the DELSOL products. In practice, this means that an advisory firm or an SME already using Contasol for accounting can automatically transfer payroll entries to the accounting ledger without manually re-entering the amounts. The same cycle applies with Factusol if both programmes are in use.
For those who want to move to the cloud without abandoning the programmes they already know, DELSOL 360 is the cloud suite that integrates Nominasol, Contasol and Factusol on a single web-access platform. This allows, for example, the HR department to manage payroll from the office while the external advisory firm accesses the same data from its own premises, with no file exchange and no risk of working with different versions.
If your advisory firm handles a high volume of clients and needs a more comprehensive solution for the labour area — with an employee portal, practice management and an integrated tax module — the alternative within the TeamSystem ecosystem is Aplifisa, the suite designed specifically for professional firms.
Frequently asked questions
Does Nominasol work with the Social Security direct settlement system?
Yes. Nominasol generates files compatible with SILTRA, which is the TGSS tool for the direct settlement system. The process involves exporting the file from Nominasol, importing it into SILTRA and confirming the contribution calculation returned by the Treasury before payment. The integration covers both General Scheme contributions and affiliation communications through NS Conect@.
Can I submit Form 111 directly from Nominasol?
Nominasol generates the Form 111 XML file in the format accepted by the AEAT for electronic submission. Users can import that file into the AEAT Electronic Office or, if they have a batch submission programme (such as those offered by the main professional associations), submit the 111 forms for all their clients at once. The programme does not submit directly to the Electronic Office, but the exported file is ready to use without any further modification.
Is Nominasol suitable for self-employed individuals under direct assessment?
Nominasol is designed for managing the payroll of employees — that is, for calculating salaries, Social Security contributions and IRPF withholdings for the employees of a company or the clients of a labour advisory firm. It is not an invoicing or accounting tool for self-employed individuals. If a self-employed person needs to manage their own invoices, the right product within the DELSOL/TeamSystem ecosystem is Factusol or Billin.
What happens if I receive an error when sending the file through SILTRA?
SILTRA errors come with a code and a description indicating the affected field or company. The most common ones relate to discrepancies in a worker's affiliation number, contribution bases outside the permitted range or affiliation communications not correctly registered. In most cases, the fix involves reviewing the worker's record in Nominasol, correcting the erroneous data and regenerating the file. If the error persists or the code is not easily interpreted, the Summum Sistemas support team can analyse the file and the configuration to identify the root cause.