The Required Return: How to Calculate the Number Your Retirement Actually Needs

There is a number embedded in every retirement plan. It is the return your portfolio must generate — not to grow wealthy, not to outperform a benchmark, but simply to fund the retirement you have described without running out of money before you run out of time.

Most investors have never seen this number explicitly stated. Their advisor has never written it down. It has never appeared in a proposal, a review meeting, or a quarterly statement. And yet every allocation decision, every fund selection, every rebalancing event is implicitly aimed at hitting it — or not.

This is the Required Return. And the failure to calculate it explicitly is one of the most consequential oversights in conventional retirement planning.

What the Required Return Actually Is

The Required Return is the annualized rate of return your portfolio must achieve, after fees and taxes, to fund your projected spending throughout retirement without depleting principal before the end of your planning horizon.

It is not an aspiration. It is not a target. It is a mathematical constraint — the minimum threshold your strategy must clear for your retirement to work as described.

The calculation is straightforward in concept, though it requires honest inputs:

• Current investable assets — the capital base from which withdrawals will be funded
• Annual retirement spending — the actual dollar amount required each year, including taxes, healthcare, housing, and discretionary spending
• Other income sources — Social Security, pension, rental income, or any other reliable cash flow that reduces the portfolio's burden
• Planning horizon — the number of years the portfolio must last, typically to age 90 or 95 for conservative planning
• Inflation assumption — the rate at which spending will increase over time

From these inputs, a straightforward present-value calculation produces the Required Return: the rate at which your portfolio must compound to fund your spending from today through the end of your planning horizon.

Why Most Advisors Never Show You This Number

The conventional advisory model is built around a different question. Instead of asking "what return does this client's retirement require," it asks "what allocation is appropriate for this client's risk tolerance."

These are not the same question. And the difference matters enormously.

A risk tolerance questionnaire produces an allocation. A 60/40 portfolio, a 70/30 portfolio, a "moderate" or "moderately aggressive" profile. The allocation is then presented as the strategy — as if the act of constructing a diversified portfolio is itself a retirement plan.

It is not. An allocation is a starting point. A strategy is the set of rules that governs how that allocation responds to changing conditions, changing markets, and changing circumstances. And a retirement plan is only valid if the allocation it prescribes is actually capable of delivering the return the retirement requires.

The conventional model rarely connects these two things explicitly. The Required Return is implied — buried in the assumptions of a Monte Carlo simulation or a financial planning software projection — but it is almost never stated plainly as the governing constraint it actually is.

The result is that most investors are managing to a benchmark (the S&P 500, a blended index, a peer group) rather than managing to a number. And those are fundamentally different objectives.

A Concrete Example

Consider a couple approaching retirement with $1.2 million in investable assets. They plan to spend $90,000 per year in retirement. Social Security will provide $42,000 per year combined. Their planning horizon is 30 years.

The portfolio must fund the gap: $90,000 minus $42,000 = $48,000 per year, growing with inflation (assume 3% annually) for 30 years.

The present value of that spending stream, discounted at various rates, tells us what return the portfolio must earn:

• At a 4% real return: the portfolio can fund the spending — barely
• At a 3% real return: the portfolio runs out in approximately year 26
• At a 5% real return: the portfolio survives with a meaningful buffer

In this case, the Required Return is approximately 4% real (above inflation), or roughly 7% nominal assuming 3% inflation. That is the number the strategy must deliver.

Now the question becomes: does the current allocation — whatever it is — have a realistic probability of delivering 7% nominal over 30 years, net of fees and taxes? If the answer is yes, the strategy is adequate. If the answer is no, or if the answer is "we're not sure," the strategy has a structural problem that no amount of rebalancing will fix.

The Sequence of Returns Problem

The Required Return calculation above assumes a smooth, consistent annual return. Real markets do not work that way. And for retirement investors, the sequence in which returns occur matters as much as their average.

This is the sequence of returns risk, and it is the most underappreciated structural threat in retirement planning.

Consider two portfolios, both earning an average of 7% per year over 20 years. Portfolio A earns strong returns in the early years and weak returns later. Portfolio B earns weak returns early and strong returns later. Both portfolios, in isolation, end at the same value.

But if both portfolios are funding annual withdrawals, Portfolio B — the one with weak early returns — will be depleted far sooner. The withdrawals taken during the down years remove capital that cannot participate in the subsequent recovery. The math is irreversible.

This is why the Required Return is not simply a long-term average. It is a constraint that must be met in a sequence-sensitive way. A strategy that produces the right average return but delivers it in the wrong order can still fail to fund a retirement.

The implication is significant: a retirement portfolio that is permanently positioned for long-term growth — the conventional approach — is not optimized for the sequence-sensitive reality of retirement withdrawals. It is optimized for accumulation, not distribution. These are different problems requiring different solutions.

What a Rules-Driven Strategy Does Differently

A rules-driven strategy begins with the Required Return as its governing constraint. Every allocation decision is evaluated against a single question: does this positioning give the portfolio a realistic probability of delivering the Required Return, given current market conditions?

This reframes the entire investment process. Instead of asking "what is the appropriate long-term allocation for this client's risk profile," the question becomes "what allocation is currently best positioned to deliver this client's Required Return, given where we are in the market cycle?"

The answer changes over time. A regime of rising interest rates calls for different positioning than a regime of falling rates. A period of broad equity leadership calls for different sector exposure than a period of narrow, defensive leadership. A portfolio that was appropriately positioned in 2021 was not appropriately positioned in 2022 — and a strategy that did not adapt to that change was not managing capital. It was monitoring it.

The rules that govern these adaptations are not discretionary. They are written, explicit, and applied consistently. The SectorPulse™ system identifies which sectors of the equity market are exhibiting relative strength — and therefore which are most likely to contribute to the Required Return in the current environment. The BondPulse™ system applies the same logic to fixed income, distinguishing between regimes where bonds provide genuine diversification and regimes where they introduce duration risk without compensating return.

Together, these systems produce a portfolio that is not static. It is not permanently aggressive or permanently defensive. It is positioned for the conditions that actually exist — and repositioned when those conditions change.

The Gap Most Investors Are Living With

The Required Return calculation frequently reveals a gap. The portfolio is not positioned to deliver what the retirement requires. This gap takes several forms:

The return gap. The portfolio's expected return, given its current allocation and fee structure, is below the Required Return. The retirement is underfunded not because of bad luck, but because of structural inadequacy in the strategy itself.

The sequence gap. The portfolio's expected return may be adequate on average, but its allocation leaves it vulnerable to a significant early decline — the kind that, if it occurs in the first five years of retirement, cannot be recovered from through subsequent gains.

The fee gap. The portfolio's gross return may be adequate, but after advisory fees, fund expenses, and tax drag, the net return falls below the Required Return. A portfolio earning 7% gross but paying 1.5% in total fees and expenses needs to earn 8.5% gross to net 7% — a meaningfully higher hurdle.

The assumption gap. The Required Return was calculated using spending assumptions that no longer reflect reality. Healthcare costs have increased. A child needed help. A home required a major repair. The spending number changed, but the strategy did not.

Each of these gaps is identifiable. Each has a specific remedy. But none of them can be identified or remedied if the Required Return has never been explicitly calculated.

The First Question to Ask

If you have never seen your Required Return stated explicitly — as a specific percentage, calculated from your actual spending, your actual assets, and your actual planning horizon — the first question to ask your advisor is: what return does my retirement require?

If the answer is vague ("we're targeting a moderate return," "we're positioned for long-term growth"), that is not an answer. It is an avoidance of the question.

If the answer is specific ("your Required Return is 6.8% nominal, and here is how we are positioned to deliver it"), the next question is: how does the current allocation compare to that requirement, and what rules govern how the allocation changes when market conditions change?

A strategy that cannot answer both questions is not a strategy. It is a portfolio — a collection of assets assembled according to a risk profile, managed to a benchmark, and reviewed on a schedule. That is not the same thing as a plan to fund a retirement.

What to Do With This Information

The Required Return is not a complicated concept. It is a simple calculation that most investors have never been shown. The reason it matters is not mathematical — it is structural. It changes the question from "how is my portfolio performing relative to the market" to "is my portfolio on track to fund my retirement."

These are different questions. The first is about relative performance. The second is about whether the strategy is working. For a retirement investor, only the second question matters.

A Portfolio Evaluation begins with this calculation. We determine your Required Return from your actual numbers — your spending, your assets, your income sources, your timeline. We then assess whether your current strategy is realistically positioned to deliver it, and where the gaps are if it is not.

The evaluation takes less than an hour. It costs nothing. And it produces a clear picture of where you stand — not relative to an index, but relative to the number your retirement actually requires.