Is a Financial Adviser Worth the Money? What the Research Shows

Research from Canada, the UK, and Ireland points the same direction: long-term advised households tend to accumulate measurably more wealth than otherwise-similar unadvised households, often by large margins. The more useful question isn't whether advice has value on average — it's what kind of advice, in what situations, and what specific value drivers actually move the needle. This guide walks through the research, the maths, and a framework for deciding when advice is high-value and when DIY works.

What the research actually shows

Several large studies over the past decade have tried to quantify the value of financial advice by comparing advised and unadvised households over long periods. The results point in the same direction.

The Canadian study: nearly 4x more wealth over 15 years

The largest and most cited piece of research is the CIRANO study, "The Gamma Factor and the Value of Financial Advice", published in 2016 by the Montreal-based Centre for Interuniversity Research and Analysis of Organizations. It analysed data from a 2014 Ipsos survey of 1,584 Canadian households, comparing those who had used a financial adviser long-term against comparable households who hadn't.

The headline finding: households that had retained a financial adviser for 15 years or more had accumulated 290% more financial assets than otherwise-similar households without an adviser. That's nearly four times the wealth.

The researchers identified two main drivers of the difference, which they called the "gamma factor":

1. Higher savings rates. Advised households saved 10.75% of income on average, compared to 6.7% for unadvised households. Over decades, that gap alone compounds into a large difference.
2. Behavioural discipline. Advised households were more likely to stay invested through market downturns rather than panic-selling, and more likely to maintain an appropriate growth allocation rather than drifting too conservative.

A related finding from the same researchers: households that dropped their adviser between 2010 and 2014 saw their asset values increase by only 1.7% over that period, while households that retained their adviser saw asset values increase by 16.4%. The behavioural protection was particularly valuable around market volatility.

Critics have noted limitations. The advised group may have been more financially engaged to begin with, the savings rate gap might partly reflect underlying personality differences, and survey-based studies have inherent constraints. The researchers tried to control for these by comparing households with similar income, education, and demographics, but no observational study fully solves the causation question.

Even with those caveats, the directional finding is consistent across follow-up work. A conservative reading still leaves a meaningful wealth gap in favour of advised households.

The UK study: £47,000 more wealth in a decade

In Britain, the International Longevity Centre (ILC-UK) conducted similar research using the government's Wealth and Assets Survey, which tracks household wealth over time. The 2017 study, updated in 2019 under the title "What it's Worth: Revisiting the Value of Financial Advice", found that people who received professional financial advice between 2001 and 2006 were on average £47,706 better off by 2014/16 than otherwise-similar people who hadn't.

The wealth uplift broke down as £31,000 of additional pension wealth and £16,000 of additional non-pension financial assets. The proportionate impact was greater for people of more modest means (a 35% uplift for the "just getting by" group versus 24% for the "affluent" group), which contradicts the assumption that advice is only worthwhile for the wealthy.

The primary driver in the UK study was different from Canada. Advised clients adopted appropriate levels of risk, which meant they weren't holding too much in cash or low-return assets. Unadvised people were chronically too cautious, which over a decade cost them tens of thousands in foregone returns.

The Irish study: 60% more in savings, 55% larger pensions

A 2023 survey by Brokers Ireland of 1,000 Irish adults found that people who had used a financial adviser had 60% more in savings and investments on average (€71,332 versus €44,754) and 55% larger pension pots (€130,525 versus €84,230). Smaller magnitude than the Canadian or UK studies, but in the same direction.

The framework: Vanguard's Adviser's Alpha

Vanguard, one of the world's largest investment managers, has produced research since 2001 quantifying where financial advisers actually add value. Their "Adviser's Alpha" framework, updated in 2022, attributes roughly 3% in net annual returns to a well-delivered advice relationship, though the value isn't even (some years much higher, some years zero, some years negative).

The 3% breaks into seven specific value drivers:

Value driver	Estimated contribution
Behavioural coaching (avoiding panic sales and chasing performance)	Up to 2.0%
Cost-effective product selection (lower-fee funds)	~0.30%
Rebalancing	~0.14%
Asset allocation aligned to risk tolerance	Varies, often >0%
Tax-efficient asset location	Varies, up to 0.6%
Spending strategy / withdrawal order	Up to 1.2%
Total return versus income investing	Varies

The largest component (and the most counterintuitive) is behavioural coaching. The single thing advisers do most reliably is stop their clients from making the worst possible decision at the worst possible time, like selling growth funds at the bottom of a market crash. Across decades of investing, avoiding two or three big behavioural errors is worth more than perfect product selection.

The maths: what advice costs versus what it generates

Translate these findings into concrete dollar terms with a New Zealand example.

A 40-year-old with $100,000 in KiwiSaver, contributing $10,000 a year (employee plus employer plus member), invested in a Growth fund averaging 4.5% real returns — the FMA-aligned projection rate for a Growth fund — over 25 years to age 65. With no advice, no behavioural errors, and a well-chosen fund, they retire with about $746,000 in today's dollars.

Now apply the Vanguard framework, which expresses adviser value as net additional return after the adviser's fee is paid:

Scenario A: advice adds 1% per year in net returns. Conservative interpretation of the Vanguard research. The same person retires with about $893,000. That's $147,000 more wealth, net of every fee, over the working life.

Scenario B: advice adds 2% per year in net returns. Near the upper range of what the Vanguard framework suggests is achievable through behavioural coaching, asset allocation, and tax-efficient structuring. Same person retires with about $1,072,000. That's $326,000 more wealth, net of every fee.

Even Scenario A is significant. Scenario B is transformational over a working life. These figures don't include the second-order benefits either: a better mortgage structure, the right amount of life and trauma cover bought efficiently, tax savings on FIF and PIE positioning, or the avoidance of a single panic-sale during a 30% market drawdown (which alone can wipe out a decade of returns).

The opposite case is also worth stating. The Vanguard 3% figure assumes a well-delivered advice relationship. An adviser who adds no behavioural value, recommends high-fee active funds, and earns conflicting commission could plausibly subtract 1% or more in net terms, in which case you'd be better off DIY. The maths cuts both ways. Choosing well matters.

These figures use 4.5% real annual returns as the base — the FMA's projection-standard real rate for a Growth KiwiSaver fund. The "+1%" and "+2%" advice uplift scenarios assume the Vanguard framework's net-of-fee return uplift applies steadily on top, which is a working assumption rather than a forecast. Real-world outcomes vary materially with fund choice, market sequence, behavioural discipline, and the quality of advice actually delivered. Returns aren't guaranteed.

When financial advice is high-value

Some situations consistently surface in the research and in adviser practice as high-value:

Pre-retirement planning (5 to 15 years out). The decisions you make in your final working years (contribution rates, glide path, drawdown sequencing, NZ Super timing) compound into very different retirement outcomes. The maths is complex, the stakes are high, and the room for error is large. This is probably the highest-value period to engage an adviser if you only do it once.

Liquidity events. Selling a business, exercising employee share options, an IPO event, inheritance, or a redundancy payment all create a one-off pool of capital that needs careful planning around tax, structure, and deployment. Mistakes are expensive and often irreversible. An adviser's value here is usually many multiples of the fee.

Business owners. Different tax structure, different cashflow patterns, different succession planning needs, often a single concentrated asset (the business itself) that distorts the portfolio. The advice complexity is higher and the value-add per hour of advice is higher.

Pre-Australian or international moves. Trans-Tasman tax treatment, FIF rules, KiwiSaver portability, employer share schemes, and pension transfers all interact in ways that can cost (or save) tens of thousands depending on the path taken.

Behavioural risk. If you know yourself well enough to know that you're prone to panic-selling, chasing hot funds, or making impulsive financial decisions, an adviser is a check on your worst instincts. That check has measurable value.

Comprehensive cases. When the picture includes a mortgage, KiwiSaver, an investment portfolio, multiple insurance policies, a trust, a business, and an estate plan, the interactions between those pieces are where good comprehensive advice creates value. Each piece in isolation might be manageable. The integrated whole rarely is.

When DIY is fine

There are situations where the case for ongoing advice is weaker:

Small KiwiSaver-only situations. If your only financial asset is a modest KiwiSaver balance and you're more than 15 years from retirement, the highest-value move is usually just to be in a sensible growth fund with low fees, keep contributing, and don't touch it. That's a 30-minute decision, not a $3,000-a-year relationship.

Confident, evidence-based DIY investors. People who understand passive investing, behave well in market downturns, are comfortable doing their own tax in PIE and FIF, and have the time and interest to maintain a sensible portfolio can do perfectly well without ongoing advice. The proportion of New Zealanders who actually fit this profile is small but real.

Very simple situations. Salary income, KiwiSaver, an emergency fund, and a mortgage. Nothing else. You probably don't need ongoing advice. You might benefit from a one-off plan to confirm you're on track.

Cost-prohibitive situations. If you have $5,000 to invest and an adviser charges $3,000 for a plan, the maths doesn't work. Smaller investors are often better served by digital platforms, low-cost index funds, and free educational resources until the portfolio reaches a level where advice fees are a sensible proportion of assets.

A practical decision framework

A simple way to think about whether to engage an adviser:

Advice tends to be high-value when:

• The decision is large enough that getting it wrong costs more than the fee
• The complexity exceeds what you'd be confident handling alone
• You're at a transition point (retirement, liquidity event, major life change)
• You know yourself well enough to know you'll benefit from behavioural support
• The integrated picture is more complex than any single piece

DIY can work when:

• The situation is genuinely simple
• You're comfortable, informed, and behaviourally disciplined
• The portfolio is small enough that fees would be disproportionate
• You'd act on the advice yourself anyway

A hybrid approach: For many people, the structure that fits isn't "all advice all the time" or "all DIY all the time". It's paying for advice strategically (a one-off plan, a major decision review, a periodic check-in) while handling routine execution through low-cost platforms. This minimises ongoing fees while capturing the highest-value moments of advice.

What the evidence suggests

The research is consistent across geographies that, on average, long-term advised households accumulate measurably more wealth than otherwise-similar unadvised households. The Canadian work points to around 290% more financial assets over 15 years for retained-adviser households (CIRANO, 2016). The UK longitudinal study found tens of thousands of pounds in additional wealth over a decade (ILC-UK, 2019). Vanguard's framework attributes roughly 3% per year in net value to a well-delivered relationship, with behavioural coaching as the largest single component (Vanguard, 2022).

These averages don't apply to every adviser or every situation — bad advice is expensive in any framework, and the evidence is strongest for the situations described above (pre-retirement, liquidity events, complex households). For the situations the research focuses on, the evidence points to yes. For simpler situations, the case is weaker.

What to read next

• What is a financial adviser? — the foundational background on NZ's 2021 regime, fee models, and what an adviser owes you under the Code.
• How to choose a financial adviser in New Zealand — the four-step process for shortlisting, vetting, and engaging an NZ-licensed adviser.

Sources

• Montmarquette, C. and Viennot-Briot, N. (2016). The Gamma Factor and the Value of Financial Advice. CIRANO, Montreal.
• International Longevity Centre UK and Royal London (2019). What it's Worth: Revisiting the Value of Financial Advice.
• Brokers Ireland (2023). Value of Professional Financial Advice Report.
• Kinniry, F. et al. (2022). Putting a Value on Your Value: Quantifying Vanguard Adviser's Alpha. The Vanguard Group.

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Last updated: 25 May 2026. Sources: FMA (fma.govt.nz), MBIE (mbie.govt.nz), Financial Advice NZ (financialadvice.nz). This is educational content, not financial advice.