Built for accountants handling foreign asset disposals
The exchange rate is part of the gain.
TealFX compares official HMRC and Bank of England rate methodologies, then calculates the FX component automatically.
HMRC
Monthly
£12,435
BoEBank of England
Daily
£13,444
£1,009 difference in illustrative CGT.
Same disposal. Same dates. Different tax outcome.
The calculation most advisers miss
Most foreign asset CGT calculations stop too early.
A foreign asset disposal is not just an asset gain translated into sterling. The exchange-rate movement between acquisition and disposal creates its own tax effect — and it is often still handled through manual lookups and spreadsheet calculations.
TealFX separates and calculates all three — automatically.
The asset gain
The gain or loss on the asset itself, in local currency.
The FX component
The gain or loss created by exchange-rate movement between acquisition and disposal.
The total CGT outcome
What those components mean for the final result — correctly calculated in GBP.
Try it
Calculate the FX impact on a real disposal
Enter acquisition and disposal details. We retrieve the HMRC monthly average and Bank of England daily spot rate, and shows your capital gain under both.
Foreign currency
Acquisition
Disposal
HMRC Monthly Avg
BoE Daily Spot
Better rate source
CGT saving
Based on 24% CGT rate (property · higher rate) · indicative only · HMRC & BoE official data
Save this calculation to your client file
Choose CGT rate scenario and asset type, add rate justification, export as PDF, keep a full audit trail.
Three steps
From disposal to working paper in minutes
Enter acquisition and disposal details
Input the foreign currency amounts, dates, and asset type. We handle the rest.
TealFX applies the official rates
HMRC monthly average and Bank of England daily methodologies are retrieved and applied automatically for both acquisition and disposal dates.
Export a clearer CGT working paper
Get a structured output showing the source, dates, method and numbers behind the result — ready to attach to the client file.
The detail that matters
Same disposal. Two valid rates. Different numbers.
HMRC Monthly Avg
BoE Daily Spot
Both rates are published by UK government bodies. Both are accepted by HMRC for CGT calculations. On a £250,000 disposal, a gap of 0.0064 changes the sterling figure by over £1,000 — before you've even considered the gain itself. The question isn’t which is lower. It’s which one you’re filing with — and whether you know what it means.
See both calculated automaticallyWho it’s for
Built for the accountants who get the complex clients
Data & privacy
Client data handled with care
You're entering sensitive financial information on behalf of clients. Here's exactly how it's treated.
Encrypted in transit and at rest
All data is transmitted over HTTPS and stored encrypted. Your client figures are never exposed in plain text.
Your data, only yours
Saved calculations are private to your account. We never use client data for any purpose other than running your calculation.
UK-hosted, GDPR compliant
Data is hosted within the UK. We operate under UK GDPR and you can request deletion of all your data at any time.
Export or delete any time
Your calculations are yours. Delete your account and all associated data permanently at any time — no hoops.
Defensible working papers
Working papers matter more when manual decisions are harder to defend.
TealFX records the source, date and method behind each calculation — so the file is clearer than a spreadsheet and stronger than a browser history.
Without TealFX
- ✕ Google search for the rate
- ✕ Source unclear — HMRC or BoE?
- ✕ Copy-pasted into a spreadsheet
- ✕ No comparison between rate sources
- ✕ No record of method or date
With TealFX
- ✓ Official source pulled automatically
- ✓ Rate, date and source recorded
- ✓ Methodology explicit and consistent
- ✓ Both HMRC and BoE rates compared
- ✓ Exportable report for the client file
Pricing
Straightforward pricing
Start free, explore the workflow, then upgrade when you're ready to use TealFX on live client files.
Free
Try the calculator
No account needed. Run the full HMRC vs BoE comparison instantly.
- HMRC & BoE rate lookup
- Full HMRC vs BoE comparison
- FX impact breakdown
- No sign-up required
Pro
For tax professionals
For tax professionals advising clients on foreign assets and cross-border disposals.
- Everything in Free
- Save calculations by client
- PDF CGT report export
- Client notes & references
- Full calculation history
- CSV export
- 7‑day free trial
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Spreadsheets don't fail loudly.
They fail quietly.
Every manual lookup is an undocumented decision waiting to become a problem.
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