Inheritance Tax Calculator
This calculator provides an estimate of inheritance or estate tax under common UK and US federal scenarios. It shows intermediate values (net estate, taxable amount) so you can see how exemptions and deductions affect the result.
The tool is an estimator only: it uses user-provided inputs and configurable assumptions. It is not a substitute for professional tax advice or official filings.
Estimate using a single nil-rate band and the standard rate. Use this when reduced-rate or residence nil-rate band does not apply.
Inputs
Advanced inputs
UK-specific inputs
US-specific inputs
Results
Net estate
$450,000.00
Taxable amount (after nil-rate band)
$125,000.00
Estimated tax due
$50,000.00
| Output | Value | Unit |
|---|---|---|
| Net estate | $450,000.00 | currency |
| Taxable amount (after nil-rate band) | $125,000.00 | currency |
| Estimated tax due | $50,000.00 | currency |
Visualization
Methodology
Each method computes a 'net estate' by subtracting debts, administration costs, allowable exemptions and chargeable lifetime gifts from the gross estate.
The calculator then applies the selected exemptions (for example a nil-rate band or federal exemption) and multiplies the remaining taxable amount by the statutory rate supplied by the method or user.
Where multiple special rules may apply (for example reduced charitable rates, residence nil-rate band, marital deductions), select the method that best matches your situation and review the intermediate values. The tool does not automatically determine eligibility for complex reliefs.
Key takeaways
Select the jurisdiction and method that best matches the situation, enter known values for assets, debts and exemptions, and review the net estate and taxable amount before reading the estimated tax due.
Use the intermediate values to check sensitivity to key assumptions such as exemptions, charitable bequests, or applied rates, and consult official guidance or a qualified advisor for filing and compliance.
Further resources
Expert Q&A
Is this a definitive tax calculation?
No. This calculator is an estimate and does not replace professional tax advice, final valuations, or official returns. It does not consider all reliefs, exemptions, timing rules, double taxation treaties, or state/provincial taxes.
What should I enter for exemptions and rates?
Enter the exemption and rate values that apply for the relevant tax year and jurisdiction. Where statutory amounts change frequently, verify the current thresholds with official sources or your tax advisor before relying on results.
How should negative taxable values be interpreted?
If the calculated taxable amount is zero or negative, the estimated tax due is zero. The calculator may display negative intermediate values for transparency; treat those results as indicating no taxable estate under the inputs provided.
How accurate is the calculator and how is data handled?
This estimator produces arithmetic results based on user inputs. It is not audited tax software. For technical reliability and data handling, systems integrating this calculator should follow established standards such as NIST guidance for secure handling of personal data and ISO standards for quality management. See citations for references.
Sources & citations
- UK government guidance — Valuing an estate — https://www.gov.uk/valuing-estate-of-someone-who-died/estimate-estate-value
- UK government — Reduced rate calculator reference — https://www.gov.uk/inheritance-tax-reduced-rate-calculator
- IRS — Estate Tax overview — https://www.irs.gov/businesses/small-businesses-self-employed/estate-tax
- NIST — Frameworks and guidance for secure handling of data — https://www.nist.gov
- ISO — Standards for quality and risk management — https://www.iso.org
- IEEE — Guidance on software and system reliability best practices — https://www.ieee.org