Cookies and storage
Effective date: 2026-08-07. UK PECR rules cover more than traditional cookies. They can also apply to technologies such as localStorage and sessionStorage when they store or access information on your device.
This website is operated by Sorvuna Limited (Company No. 17388560), registered in England and Wales. Registered office: 7 Marbury Park, Kingswood, Hull, HU7 3DG, United Kingdom. Privacy contact: privacy@sorvuna.com.
Categories we use
Sorvuna currently uses only categories that match what the site actually does:
- Essential — needed for calculators, display preferences and remembering consent choices.
- Analytics — optional. When configured and you consent, Google Analytics 4 and Microsoft Clarity may set cookies / storage described below. Enabled only with your consent on this deployment.
We do not invent Advertising, Marketing or Personalisation categories that the product does not use.
Essential storage
| Name | Type | Purpose | Category | Duration |
|---|---|---|---|---|
| sorvuna:calculator:income-tax:v1 | sessionStorage | Restore incomeTax calculator inputs in the current browser tab | Essential | Tab / window session |
| sorvuna:calculator:net-to-gross:v1 | sessionStorage | Restore netToGross calculator inputs in the current browser tab | Essential | Tab / window session |
| sorvuna:calculator:director-tax:v1 | sessionStorage | Restore directorTax calculator inputs in the current browser tab | Essential | Tab / window session |
| sorvuna:calculator:self-employed:v1 | sessionStorage | Restore selfEmployedTax calculator inputs in the current browser tab | Essential | Tab / window session |
| sorvuna:calculator:corporation-tax:v1 | sessionStorage | Restore corporationTax calculator inputs in the current browser tab | Essential | Tab / window session |
| sorvuna:calculator:capital-gains-tax:v1 | sessionStorage | Restore capitalGainsTax calculator inputs in the current browser tab | Essential | Tab / window session |
| sorvuna:calculator:stamp-duty:v1 | sessionStorage | Restore stampDuty calculator inputs in the current browser tab | Essential | Tab / window session |
| sorvuna:calculator:inheritance-tax:v1 | sessionStorage | Restore inheritanceTax calculator inputs in the current browser tab | Essential | Tab / window session |
| sorvuna.income-tax.ui-mode | localStorage | Remember Simple / Advanced mode on Income Tax | Essential | Until cleared |
| sorvuna.income-tax.perspective | localStorage | Remember employee / employer perspective on Income Tax | Essential | Until cleared |
| sorvuna:consent:v1 | localStorage | Remember analytics consent choice (version 1) | Essential | Until cleared or version changes |
Provider: Sorvuna Limited / Sorvuna (first party). Essential items are not toggleable because they are needed for the features you request or to remember your analytics choice.
Analytics (optional)
Analytics cookies and scripts load only after you Accept analytics (or enable Analytics in Cookie settings) and only when optional analytics is configured for the deployment. Reject leaves them absent. Withdrawal updates provider consent, clears first-party analytics cookies where possible, and reloads the page so third-party scripts are no longer active.
| Name | Provider | Purpose | Type | Typical duration |
|---|---|---|---|---|
| _ga | Google Analytics 4 | Distinguish unique users | First-party cookie | 2 years (Google default) |
| _ga_<container-id> | Google Analytics 4 | Persist session state | First-party cookie | 2 years (Google default) |
| _clck | Microsoft Clarity | Persist Clarity user ID and preferences for the site | First-party cookie | Per Microsoft Clarity cookie documentation (not restated as a fixed invention here) |
| _clsk | Microsoft Clarity | Connect page views into a single Clarity session recording | First-party cookie | Per Microsoft Clarity cookie documentation |
| CLID, ANONCHK, MR, MUID, SM | Microsoft Clarity / Microsoft | Third-party cookies described in Microsoft Clarity cookie documentation (browser / cross-site identifiers used by Microsoft services) | Third-party cookie | Per Microsoft documentation — see Clarity cookie reference |
Official references: GA4 cookie usage · Clarity cookies. Durations above for GA4 follow Google’s documented defaults; Clarity first-party purposes follow Microsoft’s documented descriptions. Browser limits may shorten effective lifespan.
Share links
Share links encode calculator settings in the URL. That is not a cookie, but the values travel with the link. Only share links that do not contain sensitive information.
How to change your mind
Use Cookie settings in the footer to open preferences when optional analytics is enabled for the deployment. You can leave Essential on, toggle Analytics, save or reject, and withdraw consent later. You can also clear site data in your browser.
More information
Related: Privacy · Cookies and storage · Terms of use