C10, in plain English.

B$810. That is the weekly insurable wage ceiling governing every NIB contribution in the Bahamas right now, and it is about to change. On July 1, 2026, the ceiling rises to B$830. The C10 is the monthly form that sits between that figure and the remittance, and it is what the National Insurance Board uses to verify that every employer calculated contributions correctly.

What the C10 records.

The National Insurance Board administers the C10 as a monthly contribution schedule. For each employee, the form captures three things: their insurable wages for the period, the employee NIB portion at 4.65 percent, and the employer NIB portion at 6.65 percent. The combined rate is 11.3 percent. Both calculations apply to insurable wages only. Pay above B$810 per week sits outside NIB's scope entirely. The C10 lists each portion separately, with the employer contribution distinct from the employee deduction. That split is exactly what a NIB audit checks first.

Running the numbers.

Take a worker earning B$1,000 per week. Only B$810 counts toward NIB. The employee's deduction is B$810 at 4.65 percent: B$37.67. The employer's contribution is B$810 at 6.65 percent: B$53.87. The B$190 above the ceiling is simply out of scope. After July 1, 2026, the same calculation runs against B$830 instead, adding a small increment to both sides.

When it is due.

Due by the 15th of the following month, the C10 is a monthly return. January contributions: due February 15. February contributions: due March 15. The employer submits the completed schedule and remits the collected contributions at the same time. Late remittance attracts a surcharge. At year end, the C13 reconciles all twelve C10 returns against each employee's total NIB for the calendar year and closes the employer's account.

Where audits find errors.

NIB audits surface the same mistakes, return after return.

• Applying the rate to gross wages instead of insurable wages. The ceiling is the rule. Wages above B$810 per week are outside the calculation. Employers who ignore the cap overcalculate both the employee deduction and the employer contribution, remitting more than NIB requires and creating a reconciliation problem on the C13.
• Using a stale ceiling after the July 1 update. The insurable wage ceiling moves. When July 1, 2026 arrives and the limit shifts from B$810 to B$830, the first pay run of the new period must reflect B$830. Payroll that holds the old figure understates NIB on every subsequent C10.
• Collapsing the two rates into one deduction. The employee rate is 4.65 percent. The employer rate is 6.65 percent. The C10 requires both portions reported separately. Running the combined 11.3 percent as a single employee deduction misrepresents who paid what and fails a NIB audit on structure alone.
• Missing the 15th and carrying forward the surcharge. The deadline is fixed. Late remittance attracts a surcharge, and an unresolved balance follows the account into the next return period.

How Workzoom runs it.

Workzoom calculates Bahamian NIB on every pay run and generates the C10 for the employer to submit and remit. Bahamian NIB is part of the calculation engine, not a rate table bolted on for one market. Cable Bahamas, an 850-employee organisation and a Workzoom customer, runs Bahamian payroll on the platform. Every cycle produces a ready-to-submit C10. The employer signs. The employer submits. The math was already done.