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taxcalc.com

https://taxcalc.com· First analyzed 03 Jun 2026· Updated 03 Jun 2026
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taxcalc.com
Desktop screenshot of taxcalc.com
Mobile screenshot of taxcalc.com
Mobile

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Hosting Provider

Linode (Akamai)
linode.com

IP Address

139.162.245.91

Site Location

🇬🇧 United Kingdomvia ip

Server Location

🇬🇧 London, United Kingdom

ASN

AS63949

Organization

Linode, LLC

Server

Apache

Nameservers

ns-200-b.gandi.net.ns-135-a.gandi.net.ns-145-c.gandi.net.

Performance

86

Core Web Vitals

Weight

First Contentful Paint
1.7 s10%
Speed Index
2.2 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
3.1 MB
71 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
Infrastructure
Hosting
Linode (Akamai)

Technology Stack

10 Technologies Detected

CSS Frameworks

2
Bootstrapv4.5.2
Tailwind CSS

Analytics

2
Google Analytics
Google Analytics 4

Libraries

1
jQueryv3.7.0

Icon Libraries

1
Font Awesome

Fonts

1
Google Fonts

Tag Managers

1
Google Tag Manager

Other

1
Unbounce

Web Servers

1
Apache

SEO Analysis

B73/100
21
6
1
Meta Tags7/15
Content12/12
Headings8/8
Technical20/25
E-E-A-T5/7
Images2/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile1/4
Indexability3/3
T
taxcalc.comtaxcalc.com

TaxCalc | Accountancy and Tax Return Software | Software for Accoun...

The complete tax and accountancy practice software suite, powered by a single database. Trusted by over 11,000 firms of all sizes. Fast, efficient and affor...

Title truncated. Description truncated.
Title Length102 chars

Recommended: 50-60 chars (~629px / 580px)

Description Length218 chars

Recommended: 120-160 chars

Issues (1)

  • • Title is too long (102 chars, ~629px). Will be truncated in search results.

7 issues found

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Crawlability

Sitemap
robots.txt

4 rules

Local SEO

Local Search Readiness

27/100
Needs Work
7 11

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AI & LLM Readiness

D48/100
Bot Access
20/25
Machine Read.
10/25
Schema Data
3/25
Citation
15/25

AI Bot Access

14/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User

Machine Readability

llms.txt
llms-full.txt
Semantic HTML
Heading Hierarchy
Text ratio:7%
Words:1,134
Token eff.:Optimal
Sections/1K:22

Structured Data

1 JSON-LD
Organization×1.1
sameAs entity links

Citation Readiness

Opening Summary21w
Descriptive Headingsavg 2.7w
Canonical URL
Open Graph3/3
Twitter Card3/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (9)
AI readiness recommendation preview...
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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
D
56/100
8
Passed
7
Critical
1
Warnings
Images & Alt Text
8/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
11/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
10/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
9/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
3/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
3 recommendations
  • •Accessibility recommendation preview...
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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
30/100
E
325 mg
CO₂e / view
3.1 MB
Page Weight
30%
Cleaner Than
New Visitor
371 mg
vs
Returning (cached)
186 mg
Annual (10K/mo)
39.0 kg
Emission Segments
Data Center
16 mg
Network
96 mg
Device
214 mg
Resource Breakdown
JavaScript
42.7 KB
Images
30.6 KB
CSS
664.9 KB
Fonts
2.8 KB
HTML
19.1 KB
Other
2.4 MB
Green Hosting Verified
Linode (Akamai)
Provider Match
5 recommendations
  • •Carbon footprint recommendation preview...
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D

Security Score

55%Poor
Critical / Transactional

HTTPS

No WAF

144d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

SSL Corporation

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

10.04.2026

Valid Until

25.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.taxcalc.comtaxcalc.com

SHA-256 Fingerprint

3C:5E:7B:7A:F3:B2:CB:9F:E4:FA:EA:C4:F9:8B:56:7E:86:D2:60:EE...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

access-control-allow-origin
https://admin.taxcalc.com
cache-control
🔴 No Cache(no-store, no-cache, must-revalidate)
connection
Keep-Alive
content-encoding
📦 Gzip(gzip)
content-length
19236
content-security-policy
frame-ancestors 'self';
Good Warning Issue

Email Infrastructure

Microsoft 365

Score

93

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

taxcalc-com.mail.protection.outlook.com

Domain Information

taxcalc.com

Domain Age
28y 2m

Created

08.04.1998

Expires

07.04.2027

Last Updated

07.03.2026

Registrar

Gandi SAS

DNSSEC
Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner
Cookiebot
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: Cookiebot

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
D
52/100
Mobile Friendly1 breakpoint
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
Viewport
shrink-to-fit=yes
3 recommendations
  • •Mobile compatibility recommendation preview...
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Typography & Readability

Abril Fatface + Open Sans

WCAG Partial
62/100
Readability
/30
17/30

13px · LH --

Hierarchy
/20
16/20

5.08x ratio · ✓ H1→H6

WCAG
/25
15/25

1.15:1 min contrast

Performance
/25
14/25

3 fonts · 3 req

Heading Font

Abril Fatface

Sans66px

Body Font

Open Sans

Sans13px

Contrast Ratio

1.15:1

21 issues

Reading Comfort

~63 CPL

Optimal (45–75)
66px
h1
48px
h2
48px
h3
24px
h4
13px
p

❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

✅ Optimal line length: ~63 chars/line (ideal 45–75 CPL).

❌ Very complex text: Flesch score 26/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 21 elements below WCAG AA threshold (min 1.1:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 5.1x larger than body text.

GGoogle FontsFlesch 26

Color Palette

11 unique colors
Light
#ffffff
Background· 22.5%
#257994
Accent· 20.3%
#572290
Accent· 17.700000000000003%
#68469b
Secondary· 8.4%
#4e8cab
Secondary· 7.9%
#435893
Secondary· 6.5%
#b45866
Secondary· 6.1%
#4c3b8f
Primary· 5.5%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

2
Google Tag ManagerFree
Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

1
OneTrustEnterprise

Cookie consent and privacy compliance tools

2

Categories

3

Total Tools

1

Enterprise

0

Mid-Market

Assessment: Well-developed marketing technology stack

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Scripts & Styles

27 Resources

17
Scripts
10
Styles
4
Async
1
Defer

Top Script Sources

local(7)googletagmanager.com(3)cdn.cookielaw.org(1)stackpath.bootstrapcdn.com(1)cdnjs.cloudflare.com(1)

Website Identity

TaxCalc

TaxCalc

Organization

The complete tax and accountancy practice software suite, powered by a single database. Trusted by over 11,000 firms of all sizes.

[email protected]
0345 5190 883
www.taxcalc.com
28 years old
Location detected: 🇬🇧 United Kingdomvia ip
Gandi SAS📧 Microsoft 365en

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Last analyzed: 03 Jun 2026 at 01:18

Historical Analysis & Change Tracking

taxcalc.com Technology Stack - Built With jQuery, Bootstrap, Tailwind CSS, Font Awesome, Google Fonts | StackOptic | StackOptic