Free WordPress Tax Calculator Plugin
Add free, always-current UK tax calculators to your WordPress site or any website in minutes. No coding, no maintenance, no cost — just a shortcode.
What's included
VAT Calculator
Add or remove UK VAT at 20%, 5% or 0% instantly. One of PayToolkit's most-used tools, embedded live on your page.
Council Tax Band Checker
Visitors can look up their council tax band and estimated annual charge for their area.
Take-Home Pay Calculator
Instant UK salary breakdown: Income Tax, National Insurance and take-home pay for 2026/27.
Why site owners use it
Zero maintenance
Calculators embed live from PayToolkit, so HMRC rate changes each tax year update automatically — nothing for you to patch or re-upload.
Fast, lazy-loaded
Tools load in a lazy iframe, so they don't slow down your page's initial load or hurt your Core Web Vitals.
Genuinely useful content
Give visitors a reason to stay longer on your finance, accounting or business advice content with real, working tools.
WordPress installation
Download the plugin
Download paytoolkit-free-tools.zip using the button above.
Upload in wp-admin
Go to Plugins → Add New → Upload Plugin, choose the zip file, then click Install Now.
Activate it
Click Activate Plugin once the install finishes.
Add a shortcode to any page or post
Paste one of the following into the block/classic editor:
[paytoolkit_calculator tool="council-tax-band-checker"]
[paytoolkit_calculator tool="take-home-pay-calculator"]
Not on WordPress?
Use the free HTML embed code instead — it works on Wix, Squarespace, Shopify, or any custom-built site. Just download the snippet file above and paste the relevant block into your page's HTML/embed editor.
Frequently asked questions
Is the PayToolkit WordPress plugin free?
Yes, completely free with no signup, subscription or usage limit. It embeds live PayToolkit calculators via a shortcode.
Do I need to be a registered business to use it?
No. Any WordPress site owner, blogger, freelancer or business can install and use the plugin free of charge.
Will this slow down my website?
No. The calculators load inside a lazy-loaded iframe, so they only load when a visitor scrolls to them and don't add weight to your page's initial load.
Can I use this without WordPress?
Yes. A plain HTML embed code is also available for Wix, Squarespace, Shopify, or any custom-built website — download it above.
Are the tax calculators kept up to date?
Yes. Because the plugin embeds the live PayToolkit calculators rather than a static copy, rate changes each UK tax year are applied automatically with no update needed on your side.
Ready to add these tools to your site?
Free forever. No account, no API key, no credit card.