HR software or Excel? The threshold to switch

HR software or Excel? The threshold where you must switch

Excel runs payroll for most Senegalese SMEs, and that is not absurd: it is often the right choice at the start. The problem is not the tool, it is keeping it too long. Past a certain threshold, a payroll spreadsheet no longer costs time — it creates risk: a misapplied IPRES ceiling, a late filing, a disputed payslip. Here is how to recognise that threshold, what Excel really costs, and how to switch without breaking a payroll cycle.

Why Excel works — genuinely

Let's start with what most software vendors won't say: for a company of five to ten employees, with fixed salaries and little movement, Excel is a rational choice.

●      Zero acquisition cost, or already amortised in the office suite

●      No training needed: everyone can open a spreadsheet

●      Total flexibility — you shape the calculation exactly as you want

●      No dependence on a provider or an internet connection

A competent manager produces ten compliant payslips in Excel without difficulty. If that is your situation, this article does not concern you yet — keep it for when one of the signs below appears.

The 6 signs you have passed the threshold

In the companies we support, the decision to leave Excel almost never comes after strategic reflection. It comes after an incident. These six signs precede the incident.

1. The spreadsheet has a single owner

Only one person understands the formulas. If they are away at run time, payroll stops. The most serious sign, and the most common.

2. You fix the same errors every month

An inserted row that shifts a range, a formula overwritten by manual entry, a copy-paste that breaks a reference. You are no longer calculating payroll, you are repairing the file.

3. Employees dispute their payslip

Not because the amount is wrong, but because no one can trace where it comes from. A spreadsheet has no reliable history: impossible to say who changed what, and when.

4. Filings are prepared in a rush

IPRES and CSS filing is now done online, which requires clean, structured data. Reconstructing it from a spreadsheet, every deadline, under pressure, is a risk factor in itself.

5. You have several versions of the same file

"Payroll_2026_v3_final_corrected.xlsx". If that phrase is familiar, you no longer have one source of truth, you have five.

6. You can't answer a simple question in under an hour

"How has our payroll mass evolved over twelve months by department?" In software, one click. In Excel, a project.

The hidden cost of Excel, quantified

The "Excel is free" argument does not survive the maths, because it ignores the one item that truly counts: the payroll manager's time. Below is the model applied to an SME of 45 employees.

Assumptions to adjust to your situation: a payroll manager whose monthly employer cost is 450,000 FCFA, i.e. about 2,600 FCFA per hour on a 173.33-hour basis.

Payroll task	Monthly time	Monthly cost
Entering and checking payroll variables	20 h	52 000 FCFA
Preparing IPRES and CSS filings	8 h	20 800 FCFA
Corrections and employee queries	6 h	15 600 FCFA
Issuing and distributing payslips	5 h	13 000 FCFA
Monthly total	39 h	101 400 FCFA
Annual total	468 h	1 216 800 FCFA

A little over 1.2 million FCFA a year, i.e. 468 hours — nearly three months of full-time work — spent on a process that adds no value to the company.

And this estimate is conservative: it counts neither management time on approvals nor the cost of an error. A retroactive adjustment across several employees, or a penalty for a late filing, adds directly to this amount.

The real risk: compliance

Lost time is measurable, therefore manageable. Compliance risk is invisible until the audit. Four points of vigilance specific to the Senegalese context that we regularly see fail in spreadsheets:

●      The two IPRES schemes. A spreadsheet applying uniform treatment produces an error on executives.

●      The sector-based work-accident rate. Construction and industry are not at the services rate. A spreadsheet built once does not follow a change of activity.

●      Affiliation to a Health Insurance Institution. Mandatory, and regularly omitted.

●      Traceability. In case of a Labour Inspectorate audit or a dispute, you must be able to reconstruct an old payslip's calculation. A spreadsheet overwritten each month cannot.

None of these errors is dramatic. All accumulate silently over several years, and it is the accumulation that is costly.

The threshold is not a headcount

It is the question we are asked most: at how many employees should you switch? The honest answer is that headcount is only one of three indicators. Under 10 with fixed salaries, Excel stays rational. Between 10 and 25, it is a grey zone that depends on complexity — assess with the six signs. Over 25, the volume of variables is unmanageable by hand: switch. And at any headcount, if you are multi-site, multi-country or in a sector with a raised work-accident rate, switch regardless.

The two other factors often weigh more than the number of employees:

●      Variable complexity. Overtime, performance bonuses, travel allowances, salary advances, sundry deductions. Twenty employees with ten variables each are harder to handle than sixty on a fixed salary.

●      Turnover. Each arrival and departure triggers a series of acts — affiliation, pro rata, final settlement, certificates. A high-turnover company reaches the threshold well before a stable one of the same size.

What Excel will never be able to do

●      Employee self-service: checking a leave balance, downloading a payslip, without going through HR

●      A full audit trail, showing who changed which element and when

●      Automatic updates of legal parameters when a text changes

●      A leave-and-absence approval workflow, with manager notification

●      Legally sound archiving of payslips, admissible in a dispute

This last point is the most underestimated: employee self-service alone absorbs a large share of the daily requests an HR team receives — leave and payslip questions, essentially.

How to switch without breaking a payroll cycle

●      Choose the right moment. Switch at the start of a year or after a close, never mid-adjustment period.

●      Clean the data before migrating. An incomplete record in Excel stays incomplete in the software. The longest step, and the most often skipped.

●      Run one month in parallel. Produce payroll in both systems and compare line by line. The only check that gives real confidence.

●      Migrate the accruals, not just salaries. Contribution accruals, earned leave, seniority history: without them, your year-end filings will be wrong.

●      Train managers, not only HR. An approval workflow not adopted by managers saves no one time.

●      Keep the spreadsheet read-only for six months. Your safety net, and your reference in case of a dispute over a prior period.

A well-prepared deployment for an SME of this size is measured in weeks, not months — provided step two is taken seriously.

Key takeaways

●      Excel stays rational below ten employees with fixed salaries — the problem is keeping it too long

●      Three simultaneous signs among the six mean the spreadsheet has become a liability

●      The real cost for a 45-employee SME is around 468 hours a year, nearly three months full-time

●      The main risk is not slowness but compliance: two IPRES schemes, sector-based rate, IPM, traceability

●      The threshold depends less on headcount than on variable complexity and turnover

●      A successful migration requires one month of parallel payroll and upfront data cleaning

Are you in the grey zone? Socium calculates Senegalese payroll with IPRES and CSS parameters kept up to date by our legal team, and delivers payslips directly to employees. Discover the payroll module  or book a demo to compare a real cycle with your current spreadsheet.