年末ボーナス課税方式比較器
Bonus tax comparator: calculates separate vs combined annual tax, shows net pay and recommends cheaper filing. Supports batch processing and one-click copy.
使い方
月給と年末ボーナスを入力すると、2つの課税方式の比較がリアルタイムに生成されます。
Overview
Year-End Bonus Tax Comparator is a Career tool. Bonus tax comparator: calculates separate vs combined annual tax, shows net pay and recommends cheaper filing. Supports batch processing and one-click copy. It runs 100% in your browser with no upload, so you get instant results with privacy. Whether you need a quick answer or batch processing with precise control, you can enter, validate and export in seconds. The UI is responsive on mobile, tablet and desktop and supports one-click copy.
Use cases
- Daily use of Year-End Bonus Tax Comparator: Enter monthly salary and bonus to compare both tax methods. — enter and get instant results without manual lookup.
- One-click copy keeps results ready to save, check or share with family and pros.
- Use Year-End Bonus Tax Comparator offline or on poor network — all calculations stay local and private.
- Estimate take-home pay and deductions before spending
- Compare gross vs net when switching jobs or raises
How to use
- 1 Enter monthly salary and bonus to compare both tax methods..
- 2 Review brackets and amounts; toggle variants
- 3 Screenshot results and archive with payslips
- 4 File via official systems; ask a tax pro when unsure
Highlights
- Local & private: processing stays in your browser
- Live validation with tolerant parsing
- One-click copy and export for docs, code or sheets
- Batch and offline support under poor network
Notes
- Cross-border tax is complex—get advice for big amounts
- Social charges vary by place; estimates only
- Rates and thresholds change yearly—confirm the year version
FAQ
Can I file with this?
No. Estimates only—file through official channels.
A few dollars off my payslip?
Rounding and contribution timing—usually single digits.
How is Year-End Bonus Tax Comparator different?
It runs locally with a focus on speed and privacy, plus tolerant parsing for “bonus tax” and one-click copy for reuse.
Can I use results in official reports?
Use it as a working draft and cross-check with authoritative sources; keep the exported log and parameters for traceability.
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すべての計算はブラウザ内で実行され、データはアップロードされません。