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RSUs and Property Purchase: Understanding the Potential Capital Gains Implications
You have vested RSUs and a vision: keys in your hand, a place to call home. Selling employer shares to raise a deposit feels straightforward, but the tax picture has two distinct steps you must plan for. First, RSUs are taxed as employment income at vesting, with income tax and National Insurance taken through PAYE. Then, when you sell, any increase above the market value at vesting is a capital gain and can attract Capital Gains Tax. If you want a sense of scale, the average UK first-time buyer deposit is £57,141, which makes understanding RSU property purchase capital gains crucial when you calculate net cash for a mortgage application. Read on for clear numbers, tactical timing suggestions and practical next steps so you can move from vested shares to a deposit with confidence, and know the exact tax hit to expect when you sell.
How RSUs are taxed at vesting and why that matters
When your RSUs vest they become taxable employment income. That means PAYE will collect income tax and employee National Insurance on the vesting value; for high earners that can be up to 45% income tax plus 2% employee NI. This initial tax is calculated on the market value the moment the shares vest, and it establishes your acquisition cost for future capital gains calculations. Keep a clear record of the vesting date and the price per share on that date, because if you later sell for more than that vesting price you will owe Capital Gains Tax on the difference, an entirely separate tax to the PAYE deduction at vesting. For official guidance on how RSUs are treated at vesting see the government page on tax for employee share schemes Tax on Restricted Stock Units.
Calculating CGT when you sell RSUs for a deposit
Selling vested RSUs triggers Capital Gains Tax on the gain between the market value at vesting and the sale price. The acquisition cost for CGT is the market value at vesting, not zero, so a simple example makes this concrete: if your RSUs vested at £10,000 and you sell later for £12,000, you have a taxable gain of £2,000. From April 2025 the CGT rates on shares are 18% for basic rate taxpayers and 24% for higher or additional rate taxpayers, so in that example a higher rate taxpayer would pay £480 tax. The annual CGT exemption is now only £3,000 for 2025/26, so small gains can be sheltered but larger gains will quickly exceed the allowance; see the Budget details on CGT rates and allowances CGT rates from April 2025.
RSUs are taxed as employment income at vesting, and that creates the acquisition cost for later CGT calculations; keep your vesting statements and PAYE records.
Practical strategies to reduce RSU property purchase capital gains
Small changes in timing and ownership can save meaningful tax when you sell RSUs to fund a house deposit. First, use your £3,000 CGT annual exempt amount for 2025/26 and, where relevant, transfer shares or split sales between you and a spouse or civil partner to double the allowance to £6,000; that could save up to £1,440 in tax if you both use the exemption. Second, schedule sales across tax years so you do not waste exempt amounts. Third, remember certain additional property-focused CGT supplements do not apply to share disposals; this keeps the calculation straightforward when moving cash from shares into a deposit. For guidance on transferring allowances and exemptions see the MoneyHelper section on Capital Gains Tax Spousal CGT transfers and exemptions.
Timing and simple arithmetic
Timing an RSU sale around the tax year end is one of the simplest levers you control. If you can sell part of a holding in the current tax year and part in the next, you may use two annual exemptions rather than one. Even modest gains become more efficient this way; for example splitting a £6,000 joint gain across two years uses both partners’ exemptions and avoids up to £1,440 of CGT at 24%. This is especially useful if you are close to meeting a mortgage deposit target such as the average first-time buyer deposit of £57,141, because shaving tax off the sale increases your net cash available for conveyancing, surveys and stamp duty.
The practical sale process, net proceeds and reporting
Selling RSUs to create a deposit usually happens through your employer’s share plan platform or a broker; the platform will let you sell all or part of the vested shares and move cash to your bank. Remember, PAYE will already have collected income tax at vesting, and selling triggers CGT on any gain above the vesting value. There is no stamp duty or Stamp Duty Reserve Tax (SDRT) on the disposal (sale) of shares; SDRT applies to purchases of shares (for example, the repurchase leg of a Bed & ISA may attract SDRT), unlike the stamp duty you will face on many property purchases; for an example of property stamp duty calculations see the government SDLT tool stamp duty on property purchases. If you owe CGT you normally report and pay via Self Assessment, with the filing and payment deadline of 31 January following the tax year in which you made the disposal Self Assessment for CGT.
The CGT allowance is only £3,000 in 2025/26; split sales between tax years or between spouses to use allowances efficiently and reduce the tax bill.
Worked example and practical checklist for buyers
Imagine you hold vested RSUs that originally had a vesting value of £50,000 and you sell them later for £60,000. Your taxable gain is £10,000. If you are a higher rate taxpayer and pay 24% CGT that is £2,400 of tax, but if you use the £3,000 exemption your taxable amount falls to £7,000 and tax to £1,680. In a more optimistic scenario a sale producing £60,000 gross can comfortably cover the average first-time buyer deposit of £57,141 after a modest CGT bill; some scenarios estimate around £1,200 tax on typical gains at 24%. Checklist: confirm vesting price, check PAYE records, plan sales across tax years, consider spouse allowance, and budget for Self Assessment filing.
Sell via your employer share plan or a trusted broker, check settlement timings, and factor in Self Assessment deadlines so tax is reported and paid on time.
Model both income tax at vesting and CGT on gains when calculating how much of your RSU sale will actually be available for a mortgage deposit.
CGT Rates and Allowance for RSU Sales (from April 2025)
| Taxpayer Band | CGT Rate on Shares | Practical Example: £10,000 Gain |
|---|---|---|
| Basic rate taxpayer | 18% | Tax = £1,800; after £3,000 exemption smaller gains may be tax-free |
| Higher/additional rate taxpayer | 24% | Tax = £2,400; split sales or spouse transfer can reduce this |
| Annual exempt amount | £3,000 per person | Two partners can shelter up to £6,000 jointly |
Frequently Asked Questions
If my RSUs vest and I immediately sell, do I still pay Capital Gains Tax?
If you sell immediately at the same market value as the vesting price there is typically no capital gain to tax because the sale price equals your acquisition cost. However PAYE will still have collected income tax and National Insurance on the vesting value. Keep a copy of the vesting valuation and sale confirmation to show there was no gain. If the sale price is even a small amount above the vesting value you will have a gain to declare, so check exact timestamps and prices on the platform before assuming no CGT.
Can I use Lifetime ISA funds together with RSU proceeds for a deposit?
Yes, you can combine cash from RSU sales with funds in a Lifetime ISA when buying your first home. The Lifetime ISA offers a government bonus on contributions subject to the usual rules and a specific usage window for property purchases, so coordinate timing to ensure the LISA withdrawal and RSU sale settle before exchange of contracts. Be mindful of CGT on the RSU sale, and note that unauthorised LISA withdrawals (for example, if the property purchase falls through, or you are not a first-time buyer, or the property is over the LISA price cap) trigger a 25% government withdrawal charge that exceeds the value of the bonus and results in a net loss on the amount withdrawn, so confirm timing and eligibility before drawing on the LISA. The LISA withdrawal rules must be met to avoid penalties; your conveyancer can confirm timelines for the purchase.
When should I get professional tax advice before selling RSUs for a house deposit?
If your RSU sale will generate total gains in excess of the annual exemption, or if you hold multiple tranches vesting across tax years, it is wise to consult a tax adviser. Professional advice is especially valuable if you are a higher rate taxpayer, expect gains near six figures, plan complex transfers between spouses, or have shares with matching rules such as bed and breakfast considerations. A qualified adviser can model marginal tax rates, optimise timing and ensure accurate Self Assessment reporting.
Ready to plan your RSU sale for a deposit?
If you want help modelling net proceeds from an RSU sale or timing sales around CGT allowances, our advisers can run personalised scenarios and guide you through reporting and mortgage-ready timing.
Get personalised adviceSources
- HMRC: Tax on Restricted Stock Units – Official guidance on income tax and reporting for employee share schemes including RSUs.
- UK Budget October 2024 – Details CGT rate changes and the annual exempt amount for 2025/26.
- Halifax: Average first-time buyer deposit – Quarterly data on average deposits and house prices used for deposit planning.
- MoneyHelper: Capital Gains Tax guide – Practical guidance on exemptions, spousal transfers and CGT basics.
- Gov.uk Self Assessment for CGT – Filing and payment deadlines for reporting capital gains on share disposals.
- Gov.uk SDLT calculator – Use this to estimate stamp duty on property purchases when budgeting your deposit.
Final Thoughts
Turning vested RSUs into a house deposit is an exciting and achievable step, but it pays to be precise. Know the vesting value that sets your acquisition cost, plan sales to make the most of the £3,000 2025/26 CGT allowance, consider spouse transfers, and tally both income tax at vesting and CGT on gain when you calculate net proceeds. With a clear timeline, accurate records and a simple tax checklist you can convert employer shares into the deposit you need with fewer surprises and more certainty.
Important Information
This article is for general information only and does not constitute personal tax or financial advice. The CGT annual exempt amount is £3,000 for 2025/26 (and remains £3,000 for 2026/27). CGT rates and rules may change. Selling concentrated employer stock has tax and investment implications that depend on individual circumstances. Seek professional advice before making decisions.
