Can a $399 fee cost more than a $449 fee?
Yes. For 10 hires earning $70,000 each, with all salary converted, an illustrative $399 fee plus 2% FX costs $5,156.67 per month in provider charges. A $449 fee with zero FX markup costs $4,490.00. Quote B costs $8,000 less annually despite its higher headline fee. Neither quote represents a supplier.
At this headcount, the difference in management fees is $500 a month. A 2% markup on $25,000 of monthly converted payroll also costs $500. That is the break-even point. With salary alone and full conversion, it corresponds to $30,000 annual salary per hire.
What should be included in the FX base?
Include every employment cost the provider converts and subjects to markup, not just salary. Use the additional employment-cost input for employer contributions and benefits, then apply the share actually converted. For different currency rates or bases between suppliers, use a weighted, documented effective rate or compare each currency group separately; this model assumes both quotes convert the same amount.
How the comparison works
Monthly conversion base = hires × (annual salary ÷ 12 + other monthly employment costs per hire) × conversion share
Monthly provider charges = hires × management fee + conversion base × FX markup + other monthly provider charges
Break-even conversion base = (fixed charges B − fixed charges A) ÷ (FX rate A − FX rate B)Percentages are divided by 100 in the formulas. Equal FX rates have no unique crossing point: fixed fees determine the difference, or the quotes tie at every payroll level. A negative crossing point means the quotes do not cross for a non-negative conversion base. Rounded monthly totals may not multiply exactly to the annual total.
Salary, headcount and fees are held constant for 12 months. Other provider charges are fixed monthly amounts in this model; if they vary with payroll, recalculate them for each scenario. The break-even figure varies converted payroll while holding headcount and fixed charges constant.
Make FX part of the decision
Ask every shortlisted provider for a documented reference rate, markup, conversion base and worked invoice. Compare the effective monthly charge per hire, then evaluate country coverage, compliance and service. Missing FX information remains unknown, not free.
EOR Truth · Updated 24 September 2026. Illustrative calculations. Methodology.