You have £1,000 to invest. Where should it go? The answer depends entirely on when you need the money, your tax rate, and your goals. This guide compares the four main options — and shows exactly how much more your money can grow in a tax-efficient wrapper versus a general investment account.
Option 1: Stocks & Shares ISA
Invest £1,000 into a Stocks & Shares ISA and all future growth — dividends, interest, and capital gains — is completely tax-free. There's no income tax on dividends (normally 8.75%–39.35%), no CGT on gains (normally 18%–24%), and withdrawals are unrestricted.
Tax saved (example): If your £1,000 grows to £1,500 over five years and you sell, the £500 gain is tax-free. In a GIA, a higher-rate taxpayer would owe £120 in CGT (24% × £500). The ISA saves you £120 on this single investment.
Access: Withdraw anytime, no penalty. Ideal if you might need the money within 5–10 years.
Option 2: Lifetime ISA (LISA)
If you're aged 18–39 and saving for your first home (under £450,000) or retirement (age 60+), the LISA adds a 25% government bonus on top. Your £1,000 becomes £1,250 immediately — a guaranteed 25% return before any investment growth.
Tax saved: Same ISA tax shelter (no tax on growth), plus the £250 bonus. A basic-rate taxpayer investing £1,000 through salary sacrifice into a pension gets £200 in tax relief; the LISA gives £250 regardless of your tax rate.
Restrictions: Withdrawing for any reason other than a first home purchase or at age 60+ incurs a 25% withdrawal penalty — which actually leaves you worse off than your original deposit. Only use a LISA if you're confident about the purpose.
Option 3: Pension (via salary sacrifice)
Contributing £1,000 to your pension via salary sacrifice means you never pay income tax or National Insurance on that money. For a basic-rate taxpayer, £1,000 of gross salary becomes £1,000 in your pension (vs £680 take-home if paid as salary after 20% tax and 8% NI). That's an effective 47% boost.
For a higher-rate taxpayer, the numbers are even better: £1,000 gross becomes £1,000 in the pension vs £580 take-home (after 40% tax and 2% NI). The pension is 72% more efficient.
The catch: You cannot access pension money until age 57 (rising to 58 in 2028). And when you eventually withdraw, 75% is taxed as income (the first 25% is tax-free). But if you're in a lower tax bracket in retirement, you still win.
Option 4: General Investment Account (GIA)
No special tax treatment. Dividends above £500 are taxed (8.75%, 33.75%, or 39.35%). Capital gains above £3,000 are taxed (18% or 24%). Interest above your Personal Savings Allowance (£500 or £1,000) is taxed at your marginal rate.
The only advantage: complete flexibility. No contribution limits, no withdrawal restrictions, no age requirements. Use a GIA only after you've maxed out your ISA/pension/LISA allowances, or if you need the money within 1–2 years and want to remain invested.
Head-to-head comparison: £1,000 invested for 10 years at 7% growth
- ISA: Grows to £1,967. You keep £1,967 (tax-free). Net gain: £967.
- LISA: £1,250 after bonus, grows to £2,459. You keep £2,459. Net gain: £1,459.
- Pension (basic-rate, salary sacrifice): £1,000 invested (saved £320 vs taking as salary). Grows to £1,967. At withdrawal (25% tax-free, 75% at 20%): net ≈ £1,671. Plus the £320 saved upfront. Total value: ~£1,991.
- GIA (higher-rate taxpayer): Grows to £1,967. After CGT at 24% on £967 gain: you keep £1,735. Net gain: £735.
Decision framework
- Need it in under 5 years: Stocks & Shares ISA (or cash ISA if very short-term)
- First home deposit, aged under 40: LISA (unbeatable 25% bonus)
- Retirement savings, won't touch until 57+: Pension via salary sacrifice (highest tax efficiency)
- Already maxed ISA and pension: GIA, using bed-and-ISA annually to shelter gains
What about employer match?
If your employer matches pension contributions, always take the match first. A 100% employer match doubles your £1,000 to £2,000 before any tax relief or investment growth. No ISA or LISA can compete with free money. Check your workplace scheme before choosing any other wrapper.
Calculate your personal situation
Use the income tax calculator to see your current marginal rate — this determines how much tax relief a pension contribution gives you. For pension-specific modelling, see our pension contributions and tax guide. For the LISA vs pension debate, try the LISA guide.