# Dulycore

> Dulycore is a compliance operating system for UK small and medium-sized companies. A free compliance calendar maps every statutory deadline from a company number; paid modules add tracking, checks and prepared filings for regimes that need more. A human confirms every filing — nothing is submitted to a regulator without a named person's sign-off.

Dulycore is operated by Xpectrum Ltd. Data is held in the UK. Every obligation guide is written against the underlying legislation and official guidance, names its sources, and carries a "last verified" date.

## Free tools

- [Company checker](https://dulycore.com/check): paste a UK company number, see every Companies House deadline it owes. Accepts `?company=<number>` for prefill. No signup.
- [ICO fee checker](https://dulycore.com/ico-fee-checker): which data protection fee tier a company is in, under S.I. 2018/480. No signup.

## Obligation guides

- [Confirmation statement](https://dulycore.com/file-confirmation-statement): the 14-day rule, review periods, the s.853L criminal offence.
- [Annual accounts and late filing penalties](https://dulycore.com/late-filing-penalty-companies-house): the £150–£1,500 ladder and the doubling rule.
- [Pay corporation tax](https://dulycore.com/pay-corporation-tax): nine months and one day, before the return.
- [Company tax return (CT600)](https://dulycore.com/corporation-tax-return-deadline): the filing-date rules and penalties.
- [VAT registration](https://dulycore.com/vat-registration-threshold): the £90,000 threshold, forward and backward looks.
- [VAT return](https://dulycore.com/vat-return-deadline): one month and 7 days, and the points regime.
- [PAYE payment](https://dulycore.com/paye-payment-deadline): the 22nd/19th rule and late-payment penalties.
- [Right to work check](https://dulycore.com/right-to-work-check): the employer duty and the statutory excuse.
- [Director identity verification](https://dulycore.com/companies-house-director-verification): who must verify under ECCTA, and by when.
- [Sponsor licence duties](https://dulycore.com/sponsor-licence-duties): reporting duties, record-keeping, and what is not resolved against a primary source.
- [ICO data protection fee](https://dulycore.com/ico-registration-fee): tiers, exempt processing, and the penalty formula.

## Product

- [Compliance calendar](https://dulycore.com/compliance-calendar): free forever for one company.
- [Sponsor licence & immigration](https://dulycore.com/sponsor-licence): sponsored-worker records, documents and dates. From £99/mo ex VAT.
- [Pricing](https://dulycore.com/pricing): all published pricing, VAT stated.
- [About](https://dulycore.com/about): who builds Dulycore and how the guides are written.

## Notes for agents

- See [AGENTS.md](https://dulycore.com/AGENTS.md) for how to read these pages programmatically.
- Guide dates come from the cited instruments; each page's "last verified" line is the freshness signal.
- A read-only connector for AI assistants is in development; it does not exist yet, and nothing on this site pretends it does.