Guides: deadlines, obligations and rules for your company abroad
Short, verified answers to the questions owners of a company in Singapore, Hong Kong or the USA actually have: what is due when, which condition applies, and where it is stated officially. Every statement with a source and a review date.
Current
Form C-S 2026: What your Singapore Pte. Ltd. must file by 30 November
Which form applies, when ECI is due, which reliefs apply in 2026 and what happens if you file late. With a deadline cockpit for your case.
Deadline 30 Nov 2026Updated 29 Sep 2026Singapore · TaxSingapore corporate tax 2026: rate, exemptions and rebate
The 17% rate, when the start-up exemption really applies, the YA 2026 rebate and a calculator for your effective tax burden.
CalculatorUpdated 29 Sep 2026Hong Kong · AccountingHong Kong limited company: your annual compliance calendar
Audit, profits tax return, annual return (NAR1) and business registration, with fees and a calendar based on your incorporation date.
CalendarUpdated 29 Sep 2026USA · AccountingForm 5472 and pro forma 1120 for foreign-owned LLCs
Who must file, what counts as a reportable transaction, the 15 April due date, filing by fax or mail and the IRS penalty.
Filing checkUpdated 29 Sep 2026How our guides are made
Every figure and deadline comes from an official source (such as IRAS, ACRA, the Hong Kong Inland Revenue Department or the IRS) with a retrieval date. We cross-check against current publications by tax advisers, approve every article internally, show the review date visibly and re-check each guide as soon as a rule changes. Our guides do not replace individual tax advice.
Who is behind these guides
Over ten years of experience and more than 200 companies supported in the Strasia Group network. The guides are written where we work under our own licences:
Your question is not covered?
In a free first consultation (60 minutes) we clarify your deadlines and obligations for Singapore, Hong Kong or the USA.
More: Singapore company formation · Hong Kong accounting · Compare jurisdictions