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Calculate free. Pay to keep the date under control.

Keep checked deadlines, calendar updates and history in one place. The calculator stays free, and a one-off PDF is available when you only need one calculation on the file.

Individual

Save and monitor deadlines across your matters

Keep checked calculations, calendar updates and retained history together. Which results can be saved?

Professional annual

One year of Professional at the lower annual rate.

£79.99per year

Professional annual checkout will open after the first live monthly subscription lifecycle has been reconciled.

Choose annual or monthly billing

Professional support reply target: two working days.

Billing currencyGBP

Choose the currency you intend to use. Paddle confirms the final tax and total before payment.

Put one calculation on the file

A permanent one-off PDF with the inputs, result, citation and working.

£4.99one-off

Calculate for a PDF record

Free gives you the date, citation and working. Professional keeps a checked calculation in your matter, ready for calendar updates and export.

  • Save checked results to a matter when available
  • Unlimited matters and calculation records
  • Deadline schedules with retained recalculation history
  • Calendar feeds, updates and cancellations for saved deadlines
  • Manual and court-order dates in the same matter timeline
  • Rule-change impact warnings and contingency exports
  • Professional email support with a two-working-day reply target

Payment starts immediately. Cancel online any time. Free calculator access remains available if you cancel.

Which results can be saved?

Some rules can be checked but not saved. Each result makes that clear before you choose an action. Rules needing further review or without a supported matter workflow remain free to check.

Three connected states, kept visible

No changed calculation is silently replaced.

Retained

Calculation version

When a saved calculation changes, its earlier version remains in the matter record.

On refresh

Calendar-feed state

A refreshed subscribed calendar feed reflects an updated date or a cancellation.

Review required

Rule-change impact

A changed rule is shown against affected saved matters for review without overwriting the saved result.

Calculate and check a date

See the date, citation and calculation steps. No account or payment card.

Prices in your currency

Your price is ready in GBP.

International arbitration suggests GBP. Change the billing currency in the Professional card if you will pay in another currency. Paddle confirms the currency, any applicable tax and the final total before payment.

Compare supported currenciesView price table
CurrencyMonthlyAnnual PDF record
GBP£9.99£79.99£4.99
USD$12.99$99.99$6.99
EUR€11.99€89.99€5.99
CADC$15.99C$129.99C$8.99
AUDA$18.99A$149.99A$9.99
NZDNZ$19.99NZ$159.99NZ$10.99
SGDS$15.99S$129.99S$8.99
HKDHK$99.99HK$799.99HK$49.99

Billing questions

Which results can I save with Professional?

Professional saves checked results that can be saved in an available matter workflow. Each result makes that clear before you choose. In England & Wales, CPR and Employment Tribunal results currently support saving. A rule marked for verification or without a supported workflow remains free to check, with its citation and working. The plan is for individual lawyers, barristers, clerks, paralegals and litigation professionals.

Why pay when calculation is free?

Free gives you the date, citation and calculation steps. Professional saves and monitors deadlines across your matters, with calendar feeds, recalculation history, rule-change warnings and exports.

What is a PDF calculation record?

A PDF calculation record is a one-off permanent PDF containing the inputs, result, rule ID and version, citation, calculation steps and generation time. It does not start a subscription.

No trial

No. The free calculator demonstrates the calculation itself without an account. Professional is charged when it begins and can be cancelled online any time.

How does billing currency work?

Choose from the Paddle-supported currencies available for this plan. The UAE, Bermuda, Cayman Islands and Qatar use USD, while Gibraltar uses GBP, because Paddle does not process their local currencies. A calculator jurisdiction never decides your billing country, tax treatment or plan. Paddle confirms the currency, any applicable tax and the final total before payment.

How are taxes handled?

Paddle acts as merchant of record for Paddle purchases and handles the payment, applicable sales tax, VAT or GST, and transaction documents. Checkout shows the applicable tax and final total before payment.

Need help before buying? Email deadlineengine@thesmios.com.

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