Friday, 28 November 2025

UK AUTUMN 2025 BUDGET SUMMARY

28 November 2025

1. OVERVIEW

The Autumn Budget keeps tax thresholds frozen, pulling more earners into higher bands through fiscal drag.

Cash remains attractive in the short term thanks to high SONIA-linked rates, but long-term growth still belongs to global equities.

Inflation (RPI) erodes real returns, so tax-efficient wrappers (ISA, pension) matter more than ever.

Core message: stay diversified, stay invested, and ignore political noise.

None of this is financial advice of course - you must always d y o r do your own research

2. TAX & HOUSEHOLD IMPACTS



As wages rise with inflation, more people fall into higher tax brackets.

Net take-home pay is squeezed in real terms (after inflation).
Glossary: fiscal drag = stealth tax rise via frozen thresholds.

2.2 Allowances Still Matter

ISA allowance unchanged: vital for shielding returns.

Pension contributions remain the most tax-efficient way to invest.

Dividend and CGT allowances remain historically low, making wrappers even more valuable.


3. SAVINGS, MARKETS & RETURNS

3.1 Cash (Short Term)

SONIA-linked cash accounts remain competitive.

Rate cuts expected in 2025–26 may reduce cash yields.
Glossary: SONIA = overnight interest rate between UK banks.

3.2 Equities (Medium–Long Term)

Global equities (FTSE All-World) continue to outperform over long periods.

Volatility expected but historically rewarded.
Glossary: global equities = shares across developed & emerging markets.


3.3 Inflation & Real Returns

- RPI remains above pre-pandemic levels.
- Real returns depend on staying above inflation over time.
- Glossary: 
real return = investment return minus inflation.


4. PRACTICAL ACTIONS

Maximise ISA and pension contributions where possible.

Keep a cash buffer for emergencies; invest the rest for long-term growth.

Stick to diversified portfolios rather than reacting to political cycles.

Avoid trying to time interest-rate moves or election news.

SUMMARY

5. NOTES

Cash returns use SONIA (Sterling Overnight Index Average), tracking overnight UK bank lending rates.

Global shares use the FTSE All-World Index, assuming dividends are reinvested.

Inflation uses the UK Retail Price Index (RPI), a measure of price level changes.

Real return = nominal return minus inflation.

Source: Vanguard UK analysis of the Autumn Budget (link provided).


AI generated from Vanguard handout

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