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Crewbook — お問い合わせから会計まで、ワンリンクで完結
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For fiscal years 2027 and 2028, I have arranged the 30% special provision and the simplified taxation method by the ratio of the amount owed to the consumption tax on sales. For the 1st and 2nd categories, the simplified taxation method results in a smaller amount; for the 4th through 6th categories, the 30% special provision results in a smaller amount.
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Crewbook — お問い合わせから会計まで、ワンリンクで完結
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The 20% special provision ends with the 2026 tax year. For the 2027 and 2028 tax years, sole proprietors can use the "30% special provision." So how will the consumption tax you pay change if you choose the simplified taxation system?
The payment amount under simplified taxation is: consumption tax on sales × (1 − deemed input tax rate). When converted to the percentage of payment amount relative to consumption tax on sales for each business category according to the National Tax Agency, it looks like this:
If the consumption tax on sales is 500,000 yen, the 30% special provision would be 150,000 yen, and Type 5 simplified taxation would be 250,000 yen (this is an example calculation of the estimated amount combining national and local consumption taxes).
Crewbook invoices can be issued with a breakdown of consumption tax by tax rate. By recording the consumption tax amount for each transaction from the invoice stage, you can reduce the effort required when tallying the annual consumption tax on sales later. Invoices and contracts are available from the Free plan.
Reference: National Tax Agency "FY2026 Tax System Reform Special Feature," National Tax Agency Tax Answer No. 6505 "Simplified Taxation System"
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※This article is information provided by Crewbook. It includes introduction of our own services.
This article is general information provision, and individual judgments should be confirmed with specialists such as tax accountants and tax offices. The content of the systems described is as of October 30, 2026, and may change due to future amendments or changes in operations.
2割特例は、2026年分が最後です。2027年分・2028年分は、個人事業主向けの「3割特例」を使えます。では、簡易課税を選ぶと納める消費税はどう変わるのでしょうか。
簡易課税の納付額は、売上にかかる消費税額 ×(1 − みなし仕入率)です。国税庁の事業区分ごとに、売上にかかる消費税額に対する納付額の割合へ直すと、次のようになります。
売上にかかる消費税額が50万円なら、3割特例は15万円、第5種の簡易課税は25万円です(国税と地方消費税を合わせた目安の計算例です)。
Crewbookの請求書は、税率ごとの消費税額の内訳を表示して発行できます。取引ごとの消費税額を請求書の段階から記録しておけば、年間の売上にかかる消費税額をあとから集計するときの手間を減らせます。請求書・契約書はFreeプランから使えます。
参考:国税庁「令和8年度税制改正特集」、国税庁タックスアンサー No.6505「簡易課税制度」
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※本記事はCrewbookが提供する情報です。自社サービスの紹介を含みます。
本記事は一般的な情報提供であり、個別の判断は税理士・税務署等の専門家にご確認ください。掲載している制度の内容は2026年10月30日時点のもので、今後の改正や運用の変更により変わることがあります。