The Short Version
A plain summary. The full detail follows below.
- Your calculator numbers stay in your browser. Loan amounts, salaries and rates are processed on your own device with JavaScript and are never transmitted to us or stored anywhere.
- There are no accounts. You cannot register, so we hold no usernames, passwords or profiles.
- We do not sell your data. Not to anyone, ever.
- Adverts are served by a third party (Adsterra), which may set its own cookies. That is the main privacy consideration on this site, and section 4 explains how to opt out.
1. Who We Are
Best Finance Calculator ("we", "us", "our") operates this website, which provides free financial calculators and educational articles. This policy covers this website only. It does not cover any third-party site you may reach by following a link or advertisement from here.
Using this website means you accept the practices described in this policy. If you do not agree with them, please stop using the site.
2. What We Collect
We keep data collection to the minimum needed to run the site.
- Standard server logs
- Like almost every website, our host records requests. These logs can include your IP address, browser type, device type, referring page and the time of the request. They are used for security and to diagnose faults.
- Advertising data
- Our advertising partner collects data through its own cookies and scripts to select and measure adverts. See section 4.
- Information you send us
- If you use the contact page, your message opens in your own email client. We then receive whatever you chose to write, including your email address. We use it only to reply.
- Local browser storage
- We use
sessionStorage to remember that you dismissed the footer advert bar. It stays on your device, is never sent to us, and is cleared when you close the tab.
3. What We Never Collect
This is the part most visitors care about, so we want to be unambiguous.
Every calculation runs inside your browser. Your income, loan amount, interest rate, property price, deposit and any other figure you type is processed by JavaScript on your own device. These numbers are never sent to a server, never written to a database, and never seen by us.
We also do not collect, and have no way to collect:
- Names, postal addresses or phone numbers — there are no such fields on the site.
- Bank details, card numbers, or account credentials of any kind. We will never ask for them, and you should never enter them here.
- Government identifiers such as national insurance, social security or tax file numbers.
- Passwords — there are no accounts to create.
4. Cookies & Advertising
This website is free to use and is funded entirely by advertising. To make that work we display adverts supplied by Adsterra, a third-party advertising network.
What this means in practice
- Adsterra and the advertisers it works with may set cookies or similar identifiers in your browser.
- These are typically used to limit how often you see the same advert, to measure clicks, and to show adverts thought to be more relevant to you.
- This data is collected by Adsterra under its own privacy policy. We do not control it and we do not receive it.
- We may add Google AdSense in future. If we do, this policy will be updated before it goes live.
How to opt out
You are not obliged to accept advertising cookies. You can:
Blocking advertising cookies does not restrict any feature of this site.
5. Third-Party Services
To keep the site fast and reliable we load a small number of resources from third parties. Loading a file from another domain means your IP address is visible to that provider.
- Adsterra
- Serves the adverts on this site. Sets its own cookies. See section 4.
- Google Fonts
- Supplies the Inter typeface used throughout the site.
- jsDelivr CDN
- Supplies the Font Awesome icon library.
We are not responsible for the privacy practices of these providers. We recommend reading their policies if you have concerns.
6. Your Rights
Depending on where you live, data protection law — such as the GDPR in Europe or the CCPA in California — may give you the right to access, correct, delete, or restrict the processing of your personal data, and to object to it being used for direct marketing.
Because we hold no accounts and store none of your calculator inputs, in most cases there is simply no personal data of yours for us to hand over or erase. The main exception is an email you have sent us, which we can delete on request.
For data held by our advertising partner, please exercise your rights directly with Adsterra using the links in section 4. To make a request of us, contact us here.
7. Children's Privacy
This website is intended for adults making financial decisions. It is not directed at children under 13, and we do not knowingly collect personal information from them. If you believe a child has sent us personal information, please tell us and we will delete it.
8. Data Security
The site is served over an encrypted HTTPS connection. Because the calculators run entirely in your browser and we operate no user database, the amount of data that could be exposed in a breach is extremely small by design.
That said, no method of transmission over the internet is completely secure, and we cannot guarantee absolute security.
9. Changes to This Policy
We may update this policy as the site develops — for example if we add a new advertising partner or analytics tool. The "last updated" date at the top of this page always reflects the current version. Significant changes will be made clear on the site. Please review this page from time to time.
10. Contact Us
If you have a question about this policy or about how your data is handled, we are happy to hear from you. Please use our contact page and choose "Privacy or data question" as the subject so it reaches the right place.