Learn how to combine ISAs, savings accounts and GIAs using case studies, portfolio examples and a step-by-step plan to build your own financial strategy.
Putting it all together: Building your savings & investment strategy
When it comes to managing your money, most people start by learning about individual accounts - savings accounts, ISAs, and General Investment Accounts (GIAs). Each one works differently and offers its own mix of benefits, tax rules and flexibility. But understanding these accounts in isolation is only half the story. The real value comes from knowing how to use them together in a way that supports your goals, timeframes and comfort with risk.
Whether you read our articles on ISAs, savings accounts or GIAs or you’re starting fresh here, this guide brings everything together. You’ll see real-life examples of how people combine different accounts, explore sample portfolio structures for different timelines, and walk through a practical step-by-step action plan to help you design a setup that fits your life.
By the end, you’ll understand:
How different people might use ISAs, savings accounts and GIAs in real life
What sample portfolio structures look like for short-, medium- and long-term goals
The steps to take when building your own savings and investment strategy
Case Studies: How others might use these accounts
Seeing how different accounts work in practice can make everything clearer. Here are three examples.
Case Study 1: Emma: Saving for a house deposit in 3 years
Accounts: Cash ISA and Lifetime ISA
Approach
Monthly contributions into a Cash ISA for stability
Additional savings into a Lifetime ISA to receive the 25% government bonus
Why it works
A Cash ISA protects her short-term deposit money, while the LISA boosts her savings for a first home.
Case Study 2: James: Long-term retirement planning
Accounts: Stocks & Shares ISA + Standard Savings Account
Approach
Regular investments into a Stocks & Shares ISA for long-term growth
A small emergency buffer kept in a standard savings account
Why it works
His ISA grows tax-free over decades, while the savings account keeps immediate cash on hand.
Case Study 3: Aisha: Already maxed out her ISA allowance
Accounts: Stocks & Shares ISA + GIA
Approach
Fills her full £20,000 ISA allowance each year
Invests additional money into a GIA
Why it works
She uses her tax-efficient allowance first, then takes advantage of a GIA’s flexibility. She keeps good records for tax reporting.
Sample portfolio structures
Here are a few simple ways to combine savings, ISAs and GIAs depending on your goals and timelines.
Short-Term Focus (1-3 years)
- Mostly Cash ISA or savings account
- Optional Lifetime ISA if saving for a first home
Why: Stability and accessibility matter more than growth.
Medium-Term Focus (3-7 years)
- Mix of Cash ISA (for safety) and Stocks & Shares ISA (for growth)
- Small emergency fund in savings
Why: You can take a bit more risk, but still need some short-term protection.
Long-Term Focus (7+ years)
- Significant contributions to a Stocks & Shares ISA
- Lifetime ISA for retirement (if eligible)
- Use of GIA once ISA allowance is maxed
Why: Longer timelines allow investments to ride out market ups and downs.
Action plan: Steps to build your own strategy
1. Clarify your goals
Are you saving for a home, building a buffer, or investing for retirement?
2. Set your timeframe
Short-term, medium-term and long-term goals need different types of accounts and risk levels.
3. Check allowances and eligibility
Review your:
ISA allowance
Lifetime ISA rules
GIA tax implications
Savings accessibility needs
4. Allocate across accounts
Decide how much to keep in:
savings (for stability)
ISAs (for tax efficiency)
GIAs (for flexibility once ISA allowance is full)
5. Review regularly
Circumstances, rules and goals can change. Check in at least annually.
Final thoughts
Savings accounts, ISAs and GIAs each play an important role - but the real value comes from combining them into a coordinated strategy. When used together, they help you protect your money from tax, balance risk with stability and build towards your goals with clarity.
Putting it all together means creating not just a selection of accounts, but a long-term approach that grows with you. And remember - you don’t have to do it alone. Speaking to a financial coach can help you make confident, informed decisions that fit your life.
ISAs vs investment accounts: Differences, benefits & rules
Learn how ISAs and General Investment Accounts (GIAs) work, their benefits, restrictions, and which account suits your goals and tax situation.
Reviewing your savings & investment accounts
Learn how to review your ISAs, savings and investment accounts with a simple quarterly checklist and key life-event triggers. Keep your financial plan on track.
Keep up to date
Sign up to receive updates, news and helpful resources from Thrive.
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.