A Financial Plan Is Not a Prediction
You do not need to know exactly what the future holds to prepare for it
A financial plan can help you navigate the journey — even when you can’t predict the conditions ahead.
A financial plan might show the value of your investments at 70, your income at 85 and how much money could remain when you are 100.
The numbers may be calculated to the nearest pound.
They will almost certainly be wrong.
That is not a criticism of financial planning. It is simply an acknowledgement that life cannot be predicted with that degree of precision.
Nobody knows exactly how long they will live. We do not know what investment returns or inflation will be, whether tax rules will change, or whether we will eventually need care.
We cannot be certain when our children might need help, how our health will develop or even whether the retirement we imagine today will still appeal to us in twenty years.
A financial plan cannot eliminate that uncertainty.
Nor should it pretend to.
A plan is not a promise about what will happen. It is a framework for making better decisions as life unfolds.
The danger of false precision
Detailed projections can create an impression of certainty.
If a plan says you will have £427,316 remaining at the age of 100, it is tempting to treat that figure as a forecast.
It isn’t.
Change the assumed investment return, inflation rate, spending pattern or life expectancy and the result will change—sometimes considerably.
That does not make the exercise pointless. It simply means the value lies somewhere other than the final number.
A useful plan helps you understand the relationship between the decisions you make today and the range of outcomes you might experience tomorrow.
What happens if you retire two years earlier?
Could you afford to spend more during the active years of retirement?
How would a prolonged period of poor investment returns affect you?
Could you help your children without weakening your own financial independence?
What might need to change if inflation remains higher than expected?
Those questions are more valuable than pretending we can calculate exactly what your bank balance will be several decades from now.
From prediction to preparation
A forecast tries to tell you what will happen.
A plan helps you prepare for what might happen.
That distinction matters.
A retirement plan does not need to predict every outcome correctly. It needs to be sufficiently robust to cope with a reasonable range of outcomes.
That means looking beyond a single set of assumptions.
We might test what happens if investment returns are lower than expected, if inflation is higher, if spending increases or if retirement lasts longer than anticipated.
We can explore difficult scenarios without assuming every one of them will occur simultaneously.
The purpose is not to frighten someone with an endless list of everything that might go wrong. It is to identify which changes the plan could absorb and which would require a response.
Uncertainty then becomes something to manage rather than something to fear.
Plans are built on assumptions
Every financial plan requires assumptions.
We need to make a reasonable estimate of future inflation and investment returns. We must decide how spending could change and how long the money may need to last.
The mistake is not using assumptions.
The mistake is forgetting that they are assumptions.
A good plan makes them visible, tests their consequences and reviews them as new information becomes available.
If returns are lower than expected, the response might be to spend slightly less, retire a little later or accept a different level of investment risk.
If returns are better, there may be scope to spend more, help family or retire sooner.
If your priorities change, the plan should change with them.
Financial planning is not about setting a course at 55 and refusing to alter it for the next 45 years.
It is about knowing your intended direction, monitoring your progress and making sensible adjustments along the way.
What does a good plan provide?
If a financial plan cannot offer certainty, what should it offer?
In my view, three things:
Confidence
A plan should give you a clearer understanding of what is realistically affordable. That may provide the confidence to retire, reduce your hours, take the holiday or help your family.
Sometimes it may confirm that greater caution is needed. But either way, the decision is informed rather than driven by a vague fear of running out.
Flexibility
Life rarely unfolds exactly as expected.
Markets rise and fall. Health changes. Families change. What seemed important at 55 may matter far less at 75.
A plan should be capable of adapting without collapsing whenever reality differs from the original assumptions.
Better decisions
The purpose of financial planning is not to produce an impressive chart. It is to improve the choices you make.
Should you retire now or work for another year? Can you afford to spend more? How much could you give away? What compromises would be necessary if circumstances deteriorated?
A good plan makes the consequences of those choices easier to understand.
The plan should evolve with your life
This is why financial planning should be an ongoing process rather than a one-off exercise.
The first plan is a starting point.
As time passes, estimates are replaced by facts. We discover what investment returns actually were, how much we really spent and whether our plans for retirement matched the reality.
The uncertainty does not disappear, but the picture changes.
Regular reviews allow the plan to respond.
They can identify whether you are drifting off course, but they can also reveal when things are going better than expected.
That second possibility is easily overlooked.
A review is not only an opportunity to say, “You need to save more.”
It might also allow someone to hear:
“You can afford to retire.”
“You can take the holiday.”
“You can help the children.”
“You do not need to worry quite so much.”
Robust does not mean pessimistic
Planning for uncertainty does not mean assuming catastrophe at every turn.
If we simultaneously assume terrible investment returns, permanently high inflation, exceptional longevity, escalating expenditure and substantial care costs, almost any retirement can be made to look unaffordable.
That is not necessarily prudent planning. It may simply replace false optimism with false pessimism.
A useful plan should consider difficult outcomes without losing sight of what is reasonably likely.
It should protect your future without making you too frightened to enjoy the present.
The objective is not to eliminate every conceivable risk. That would be impossible.
It is to build sufficient resilience, retain flexibility and recognise the points at which action may be required.
Better questions to ask
Instead of asking, “Will this projection be exactly right?”, consider asking:
What assumptions does the plan rely on?
What happens if some of them prove wrong?
Which risks would materially affect my future?
What could I change if circumstances deteriorated?
What opportunities might arise if things go better?
How often will the plan be reviewed?
Does it help me make a decision today?
Those questions reflect what financial planning can genuinely do.
A framework for an uncertain future
None of us can know what the next thirty, forty or fifty years will bring.
But uncertainty is not a reason to avoid planning.
We make plans precisely because the future is uncertain.
The most successful retirement plans are not necessarily those that achieve the highest returns or match the original projection most closely.
They are the ones that adapt successfully as life evolves.
The objective is not to create the perfect plan on day one.
It is to create a plan that continues to help you make good decisions on day 1,000—and beyond.
Because financial planning is not about predicting your life.
It is about giving you greater confidence and more choices, whatever life brings.
This article is adapted from my book, 50 Today, 100 Tomorrow: Planning Your Money and Life for the Next 50 Years. The book explores how thoughtful financial planning can give us more choice, confidence and purpose in the years ahead. Explore the book here.
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