Tax & Deductions

Bonus withholding is calculated based on the previous month's salary. Learn how it works.

Overview of social insurance deductions withheld from wages (health, pension, employment, nursing-care insurance).

Export social insurance enrollment/withdrawal forms for new hires and terminations.

Companies withhold income tax from each paycheck and remit it to the tax office on behalf of employees.

Process the annual standard monthly remuneration declaration submitted every July.

Process ad-hoc social insurance remuneration revisions when salary changes by 2 or more grades.

Full year-end adjustment workflow: collect declarations, calculate refunds/charges, issue withholding slips.

Calculate employment insurance premiums and export the annual labor insurance renewal forms.

Steps for administrators to run the year-end tax adjustment process in WorkVell.

How employees submit year-end tax adjustment forms in WorkVell.

How to collect and securely store employee My Number (Individual Number) in WorkVell.

Step-by-step guide for the annual year-end tax adjustment process — both employee and admin sides.

How to collect and securely manage My Number (individual number) for payroll and tax certificate purposes.

How companies withhold resident tax from salaries monthly, plus the June rate-change process.

Switching resident tax collection methods for retirement, leave, and other events.

How income tax category A (with withholding deduction declaration) vs B differs in withholding calculation.

How year-end adjustment refunds and additional collections work and where to check them.

How to calculate monthly income tax withholding using the tax table.

How to switch between employer withholding and self-payment of resident tax.

How to update resident tax amounts at the annual June switchover.

How the reconstruction special income tax is applied to withholding tax.

How to switch between main and secondary employer income tax rates.

How to calculate income tax on retirement pay using special deductions.

How changes in social insurance grade affect income tax withholding.

Understand how resident tax (住民税) is withheld monthly from your salary.

Learn how employment insurance premiums are calculated and deducted from your paycheck.

How to calculate and withhold tax on retirement income payments.

Every June, resident tax amounts change based on the prior year income. Learn how WorkVell handles the June switchover.

Every year, companies must report April-June salary data to determine new standard monthly remuneration. This guide explains the process.

When a fixed salary changes significantly, a monthly revision (Zuiji Kaitei) must be filed within a few months. Learn how to determine eligibility and process it in WorkVell.

When an employee joins or leaves, employment insurance eligibility must be reported to Hello Work (public employment security office). This guide explains the process in WorkVell.