What Company Sizes Does TinyTax Support?

id: company-size-eligibility title: What Company Sizes Does TinyTax Support? category: getting-started tags: [company size, medium company, large company, eligibility, micro-entity, small company, thresholds, CT600 only, accounts, who can use, size limit, FRS 105, FRS 102] applies_to: [all] difficulty: beginner last_updated: 2026-02-24 related: [micro-entity-vs-small-company, filing-your-first-ct600, supported-company-types-and-features]

@AdamsWinter supports companies of all sizes for CT600 filing. For Companies House accounts, there are size thresholds. This guide explains what's available depending on your company's size.

Quick Answer

What you need to file	Size restriction?
CT600 (corporation tax return to HMRC)	None — any UK limited company can file, regardless of size
Companies House accounts	Must qualify as a micro-entity or small company

ℹ If your company is too large for accounts through @AdamsWinter, you can still file your CT600 here and prepare your accounts separately.

CT600 Filing — No Size Limit

Any UK limited company can file their CT600 through @AdamsWinter, whether you're a micro-entity, small, medium, or large company. There are no turnover, balance sheet, or employee restrictions for corporation tax filing.

This means medium and large companies can use @AdamsWinter for CT600 and file their accounts through their accountant or other software.

Companies House Accounts — Size Thresholds

@AdamsWinter generates accounts in two formats: micro-entity (FRS 105) and small company (FRS 102 Section 1A). Your company must qualify for one of these to file accounts through @AdamsWinter.

Current Thresholds (periods starting on or after 6 April 2025)

Micro-entity — must meet at least 2 of these 3 criteria:

Criteria	Limit
Turnover	Up to £1,000,000
Balance sheet total	Up to £500,000
Employees	Up to 10

Small company — must meet at least 2 of these 3 criteria:

Criteria	Limit
Turnover	Up to £15,000,000
Balance sheet total	Up to £7,500,000
Employees	Up to 50

Previous Thresholds (periods starting before 6 April 2025)

Micro-entity: turnover up to £632,000, balance sheet up to £316,000, employees up to 10.

Small company: turnover up to £10.2 million, balance sheet up to £5.1 million, employees up to 50.

ℹ @AdamsWinter automatically detects which format your company qualifies for — you don't need to choose manually. For established companies, you must qualify in both the current and prior year.

What If My Company Exceeds These Thresholds?

If your company exceeds the small company thresholds, you can still use @AdamsWinter for your CT600. Just select CT600 only from the filing options on the dashboard.

You'll need to prepare and file your Companies House accounts separately — through your accountant or specialist software that supports medium/large company formats.

Common Questions

Can medium-sized companies use @AdamsWinter?

Yes — for CT600 filing. Medium companies can file their corporation tax return through @AdamsWinter and prepare accounts separately. Select "CT600 only" when starting your filing.

Can large companies use @AdamsWinter?

Yes — for CT600 filing only, same as medium companies. There's no upper size limit for corporation tax returns.

My company is a charity — does size matter?

The same rules apply. Charities can file CT600 through @AdamsWinter regardless of size. If your charity is also a Company Limited by Guarantee registered at Companies House, accounts filing is available if you meet the micro-entity or small company thresholds. See our charities guide for details.

How do I know which accounts format I qualify for?

@AdamsWinter works this out automatically based on your turnover, balance sheet total, and employee count. You'll see the format applied when you preview your accounts. See our micro-entity vs small company guide for a full comparison.

Still Have Questions?

If you're not sure whether @AdamsWinter is right for your company, get in touch and we'll help you work it out.

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