Companies House
Companies House Late Filing Penalty Calculator
Estimate the standard annual accounts late filing penalty for a private company or LLP using the due date, effective filing date, and repeat-late filing status.
Compliance tools
Practical tools for company compliance
Find a calculator, checker or generator for an individual company question. The result and its supporting rule come first.
21 trusted tools in the current public library.
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Tool matches will appear here.
Browse by compliance area
Find tools by compliance area
Companies House
Companies House compliance tools and guides
Find accounts and confirmation-statement deadlines, late-filing help, company-size checks and bounded company-status tools.
9 tools
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Corporation Tax
Corporation Tax payment, filing and calculation tools
Choose ordinary Corporation Tax payment deadlines, fixed-rate interest estimates, CT600 filing deadlines and penalties, or marginal relief.
5 tools
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Director Tax
Director dividends, salary comparisons and Section 455
Use bounded dividend tax and salary/dividend comparisons, or map director-loan account questions and the separate Section 455 company charge.
3 tools
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VAT
VAT registration, late filing and late payment tools
Check VAT registration thresholds, or assess separate late-filing and late-payment rules using actual registered-business facts.
3 tools
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Compliance Recovery
Company compliance planning resources
Use the bounded company compliance calendar or the separate CT600/current-VAT penalty appeal guide; this navigation page is not a comprehensive recovery toolkit.
1 tool
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Common tools
Start here
Start here for the most common filing and tax questions.
Companies House Late Filing Penalty Calculator
Estimate the standard Companies House late filing penalty.
Accounts Filing Deadline Calculator
Check the standard deadline for filing company accounts.
Confirmation Statement Deadline Calculator
Check when the next confirmation statement is due.
Corporation Tax Payment Deadline Calculator
Check when Corporation Tax payment is normally due.
CT600 Filing Deadline Calculator
Check the standard deadline for filing a CT600 return.
CT600 Late Filing Penalty Calculator
Estimate the standard penalty for late CT600 filing.
Dividend Tax Calculator
Estimate dividend tax using salary, dividends, and tax year.
VAT Registration Threshold Calculator
Check whether VAT registration is likely to be required.
Browse the full library
Preview each compliance area, then open the full hub when you need depth
Companies House
Companies House tools
Showing 4 of 9 tools on the main library page.
Companies House
Accounts Filing Deadline Calculator
Calculate the Companies House deadline for normal, first or valid shortened accounts periods using registered dates and the applicable filing rule.
Companies House
Confirmation Statement Deadline Calculator
Calculate the filing deadline from the known current review-period end and show the position on a date you choose.
Companies House
Confirmation Statement Late Filing Checker
Check an entered confirmation-statement due date against a chosen date, with clearly labelled Obnexo operational triage bands.
Corporation Tax
Corporation Tax tools
Showing 4 of 5 tools on the main library page.
Corporation Tax
Corporation Tax Payment Deadline Calculator
Calculate the standard Corporation Tax payment deadline from the end of the accounting period.
Corporation Tax
Corporation Tax Interest Calculator
Estimate ordinary Corporation Tax interest for one fixed balance, one manually entered annual rate and one verified interval. Changing rates, part-payments and HMRC account adjustments need separate treatment.
Corporation Tax
CT600 Filing Deadline Calculator
Calculate a standard Company Tax Return filing date using HMRC's complete twelve-month rule, including February/leap-year boundaries. Exceptional or uncertain cases require review.
Corporation Tax
CT600 Late Filing Penalty Calculator
Estimate CT600 filing penalties with calendar-month stages, deadline-based flat rates and the correct unpaid-tax snapshot.
Director Tax
Director Tax tools
Showing 3 of 3 tools on the main library page.
Director Tax
Dividend vs Salary Calculator
Compare the same pre-tax company resource as additional director salary or a post-Corporation-Tax dividend in 2025/26 or 2026/27.
Director Tax
Dividend Tax Calculator
Estimate the dividend-tax component for 2024/25, 2025/26 or 2026/27 from gross dividends and other non-savings income, with a band-by-band breakdown.
Director Tax
Director Loan Section 455 Tax Calculator
Estimate a single close-company participator loan's Section 455 charge and its nine-month-and-one-day payment deadline.
VAT
VAT tools
Showing 3 of 3 tools on the main library page.
VAT
VAT Registration Threshold Calculator
Check the two separate VAT registration tests: more than £90,000 of rolling taxable turnover, or an expectation of more than £90,000 in the next 30 days alone.
VAT
VAT Late Filing Penalty Calculator
Check a VAT late submission against annual, quarterly or monthly points thresholds using a supplied current HMRC balance.
VAT
VAT Late Payment Penalty Calculator
Estimate VAT late-payment penalties for one full payment, with the 2025 transition and day-15/day-30/daily breakdown.
Compliance Recovery
Compliance Recovery tools
Showing 1 of 1 tool on the main library page.
Compliance Recovery
Company Compliance Calendar Generator
Build a conditional later-company planning checklist; first-year, confirmation-statement, VAT and PAYE dates require separate facts.
Next step
One check answers one question. A practice needs a wider view.
Build a weekly filing-deadline review across client companies.
Use these tools for individual company facts. For recurring Companies House work across clients, Obnexo Sheets keeps source dates, practice dates and review items visible together.