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The compounding effect: How it could boost or harm your finances

May 8, 2025
5 mins

When a 1920s ad referred to compound interest as “the eighth wonder of the world”, the quote was left unattributed. But that didn’t stop it from becoming synonymous with the celebrated physicist, Albert Einstein.

The link was likely intended to lend credibility to a statement that at first glance seems bold. And yet, compounding could be key to the success of your long-term financial plans.

As Einstein did or didn’t say, “He who understands it, earns it, he who doesn’t, pays it.” Whoever did say this, knew what they were talking about.

The compounding effect – essentially growth on growth that snowballs over time – can have an enormous impact on your finances. It can significantly increase the size of your savings and investments in the long term but, if not carefully managed and understood, it can also work against you.

This handy guide clearly explains how compounding works, and provides examples of how it might boost or harm your financial circumstances.

Download your copy here: The compounding effect: How it could boost or harm your financesto find out why compounding may be an essential part of your long-term financial plan.

Please get in touch if you’d like to speak to one of our team about how we could work with you.

Please note: This guide is for general information only and does not constitute advice. The information is aimed at retail clients only.

The value of your investments (and any income from them) can go down as well as up and you may not get back the full amount you invested.

Past performance is not a reliable indicator of future performance.

Investments should be considered over the longer term and should fit in with your overall attitude to risk and financial circumstances.

The Financial Conduct Authority does not regulate cashflow planning.

A pension is a long-term investment not normally accessible until 55 (57 from April 2028). The fund value may fluctuate and can go down, which would have an impact on the level of pension benefits available. Past performance is not a reliable indicator of future performance.

The tax implications of pension withdrawals will be based on your individual circumstances. Thresholds, percentage rates, and tax legislation may change in subsequent Finance Acts.  

Hear what our clients say...

Testimonials

"I have been an existing client of Jon's since 2014, I am always pleased with how he simplifies what I consider to be quite complex matters. As a widow I trust him with all my finances and I really value our review meetings"
Mrs L
Leicester
"Aidan helped unwind some existing investments and set up new ISAs and an investment account for us. He was very clear and summarised the transactions wonderfully which enabled us to reclaim some tax back from HMRC. Thanks Aidan"
D&J.
Manchester
"I was referred to Jon by a trusted friend as I wished to review my pensions with a view to be able to retire as soon as possible. After Jon reviewed my existing pensions and put the information in a cash-flow model for me, I was delighted with the results. It gave me the confidence to retire early and I've been able to enjoy my retirement whilst I'm still fit and healthy."
Jhon C
Bury Lancs
Your Questions, Answered

Frequently Asked Questions

1. What services does Sustainable WM offer?

Once we have assessed your financial health, we develop customized solutions tailored to your specific needs and goals. Our team of experts works closely with you to design a personalized financial plan that addresses your unique challenges and objectives. Whether you're looking to grow your wealth, plan for retirement, or manage debt, we create a plan that is tailored to your individual circumstances.

2. How do you customize financial advice for each client?

Once we have assessed your financial health, we develop customized solutions tailored to your specific needs and goals. Our team of experts works closely with you to design a personalized financial plan that addresses your unique challenges and objectives. Whether you're looking to grow your wealth, plan for retirement, or manage debt, we create a plan that is tailored to your individual circumstances.

3. What is your fee structure?

Once we have assessed your financial health, we develop customized solutions tailored to your specific needs and goals. Our team of experts works closely with you to design a personalized financial plan that addresses your unique challenges and objectives. Whether you're looking to grow your wealth, plan for retirement, or manage debt, we create a plan that is tailored to your individual circumstances.

4. How do you ensure the security of my financial information?

Once we have assessed your financial health, we develop customized solutions tailored to your specific needs and goals. Our team of experts works closely with you to design a personalized financial plan that addresses your unique challenges and objectives. Whether you're looking to grow your wealth, plan for retirement, or manage debt, we create a plan that is tailored to your individual circumstances.

5. What makes your firm different from other financial advisors?

Once we have assessed your financial health, we develop customized solutions tailored to your specific needs and goals. Our team of experts works closely with you to design a personalized financial plan that addresses your unique challenges and objectives. Whether you're looking to grow your wealth, plan for retirement, or manage debt, we create a plan that is tailored to your individual circumstances.