#business
Underpayment interest is daily and quarterly — hit the 100%/110% or 90% harbor and pay the right amount by April 15, June 15, September 15, and January 15, or use Schedule AI for seasonal income before Form 2210 bills you.
An unpaid invoice isn't automatically a deduction for cash-basis businesses and worthlessness must be proven in the year claimed — document business character, collection efforts, and the specific charge-off before December 31.
Deduct premiums on Schedule 1, get reimbursed via ICHRA/QSEHRA, or take the premium tax credit — never two for the same dollar. Master the month-by-month coordination and circular math that prevents double benefits.
The $100K-or-200 shorthand is wrong in most states in 2026 — many repealed the transaction test and three big states use $500K. Track gross by state and channel before the notice does.
Federal relief says $5,000 but most states still require $600 — a form in the mailbox may be state-driven. Reconcile per-TPSO gross to taxable income and don't pay tax on mis-coded reimbursements.
2026年7月10日発効の財務省規則10050は、適格国内信託(QDOT)規則にとって30年ぶりとなる大幅な更新をもたらす。無制限配偶者控除がなぜ非市民配偶者を除外するのか、QDOTが何を要求するのか——米国人受託者、Form 706での積極的な選択、そして200万ドルを超える信託への保証——、そして新規則が事業主の遺産のために行う4つの手続き上の修正とは何かを解説する。
Solo owner with $140K profit can do $28K SEP, $35K Solo 401(k), or $16K SIMPLE — same profit, different deductions. Match the plan to employees, profit, and whether you need the deduction by December 31 or April 15.
FDAが改定した「ヘルシー」の定義は2028年2月25日から義務化される:製品は食品グループから意味のある量を含み、かつ1食あたり飽和脂肪10%DV未満、ナトリウム15%DV未満、添加糖類10%DV未満に収める必要がある。誰が新たに対象となり、誰が対象から外れるのか、コンプライアンスにかかる費用（表示更新でUPCあたり約20ドル、レシピ再処方で1件あたり約100万ドル）、そして中小食品事業者向けの実践的なタイムラインを解説する。
199A's 20% QBI deduction sunsets after 2025 as written — model the cliff by your actual capped deduction and marginal rate, revisit salary and retirement timing, and track W-2/UBIA for a retroactive extension.
A small building's first-year deduction can triple with cost segregation — reclassify 5-year, 7-year, and 15-year pieces, elect Section 179/bonus where it helps, and document the allocation the ATG expects.
Since 2022 research costs must be capitalized over 5 years — software included — midpoint in year one. Track domestic vs foreign, build the amortization schedule, and be ready for OBBBA's retroactive expensing.
車両10台のサービスフリートがGPS追跡に年間約$1,000を費やすと、燃料費・人件費・保険料で通常$15,000〜$30,000の節約を回収でき、多くの導入企業は7〜12か月以内にROIがプラスに転じる。
