CII AF8 Retirement Income: Stress-Test the Cash Flow

Table of Contents

• • Run the baseline and one stress
• • Worked case
• - Baseline
• - Immediate-fall stress
• • Turn the numbers into AF8 analysis
• • Separate essential and discretionary income
• • Add the missing real-world dimensions
• - Inflation
• - Tax and withdrawal order
• - Charges and returns
• - Longevity and survivor needs
• - Later-life costs and capacity
• - Review triggers
• • Common AF8 calculation traps

Start an AF8 retirement-income case with four calculations:

1. first-year portfolio withdrawal = target income − secure income
2. starting withdrawal rate = portfolio withdrawal ÷ invested assets × 100
3. simple no-growth coverage = invested assets ÷ portfolio withdrawal
4. stressed withdrawal rate = portfolio withdrawal ÷ assets after an immediate fall × 100

These figures expose the pressure on invested assets. They do not prove that a plan is sustainable or suitable.

The official CII AF8 unit page describes retirement-income advice before and during retirement, including later-life planning. AF8 is a Level 6 coursework unit assessed by three written assignments and assumes knowledge from R04 Pensions and Retirement Planning. The analysis must therefore go beyond the first-year arithmetic.

Run the baseline and one stress

Enter:

• target annual income: the spending need or objective being tested;
• secure annual income: income that meets the chosen definition of dependable for the relevant year;
• invested assets: the portfolio available to meet the gap;
• planned years: the period the case requires you to consider; and
• stress fall: an immediate percentage reduction in invested assets.

Use consistent figures. If target income is net of tax but secure income is gross, the result is not a valid cash-flow gap. If a pension starts later, do not include it as though it were available from year one.

Worked case

Assume a client has:

• target first-year retirement income of £48,000;
• secure income of £26,000;
• £500,000 of invested assets available for withdrawals;
• a 30-year planning period; and
• an immediate market-fall stress of 20%.

Baseline

The portfolio must initially provide:

£48,000 − £26,000 = £22,000

The starting withdrawal rate is:

£22,000 ÷ £500,000 × 100 = 4.4%

Simple no-growth coverage is:

£500,000 ÷ £22,000 = 22.7 years

That is shorter than the 30-year planning period. This does not mean the portfolio will fail in year 23: the calculation ignores growth, inflation, charges, tax and changes in spending or income. It tells you that the plan relies on more than simply dividing today’s assets into level withdrawals.

Immediate-fall stress

After a 20% fall, invested assets are:

£500,000 × 80% = £400,000

If the same £22,000 withdrawal continues, the stressed rate becomes:

£22,000 ÷ £400,000 × 100 = 5.5%

The income gap did not change, but the demand on the remaining assets increased from 4.4% to 5.5%. That is the point of the stress: it shows why an average-return assumption can hide early sequencing pressure.

Turn the numbers into AF8 analysis

Follow each number with a client consequence.

Finding	Analytical question
£22,000 first-year gap	Is all of the target essential, or can part be delayed or reduced?
4.4% starting rate	Which assets fund it, with what tax and investment effects?
22.7 years of simple coverage	What future secure income, growth or spending change does the plan rely on?
5.5% stressed rate	What action would reduce forced sales or protect essential spending after a fall?

Possible responses should be evaluated, not automatically recommended. Depending on the facts, the analysis might compare cash reserves, income layering, spending flexibility, partial guaranteed income, different withdrawal sequencing, changed asset allocation, later retirement or a lower legacy objective. Each option creates trade-offs.

Separate essential and discretionary income

A single target can hide different levels of flexibility. Split it into:

• essential: housing, food, utilities and unavoidable commitments;
• contingency: irregular but plausible costs and emergency reserves; and
• discretionary: travel, gifts and spending that can change.

Then repeat the gap calculation for essential spending. If secure income covers most essentials but not discretionary spending, a temporary market fall may be managed differently from a case where invested assets must fund basic living costs.

Do not call every pension payment “secure” without checking its terms. Record the start date, amount, escalation, survivor basis and relevant guarantee. State what you have included and why.

Add the missing real-world dimensions

The calculator deliberately excludes important variables. A complete AF8 analysis should consider:

Inflation

Increase spending and income according to the assumptions. Level income can lose purchasing power even when the nominal amount is guaranteed.

Tax and withdrawal order

Model the net cash received, not only the gross amount withdrawn. Pension, ISA and other assets do not create identical tax consequences.

Charges and returns

Use return assumptions after charges and show more than one return path. A single constant rate does not represent sequencing risk.

Longevity and survivor needs

Test a suitably long period and the position after either partner’s death. Income and expenditure may change at different times.

Later-life costs and capacity

Include plausible care, support and decision-making needs. An arrangement requiring frequent complex decisions may become harder to manage.

Review triggers

Define action points: portfolio value, withdrawal rate, cash-reserve level, spending variance, tax change, health event or death. “Review annually” is less useful than stating what the review will test.

Common AF8 calculation traps

Mixing gross and net values. Put all income and spending on the same basis.

Ignoring timing. A State Pension or defined-benefit pension beginning later cannot close today’s gap.

Using the initial rate as a verdict. A percentage is evidence for analysis, not a universal safe-or-unsafe boundary.

Stress-testing the return but not the action. State what the client or adviser would do after the adverse event.

Comparing unlike options. Test annuity, drawdown and non-pension funding against the same objectives, tax basis, survivor needs and period.

Leaving later life and legacy outside the cash flow. Both compete with available capital and can change the withdrawal strategy.

Use the AF8 retirement-income study plan to organise the technical foundations. The AF8 coursework and assignment guide shows how to carry calculations into a client-applied, evidence-based conclusion.

This tool is an educational first-pass calculation. It is not a financial forecast, a safe-withdrawal-rate model or personal financial, investment, pension or tax advice. Use current authoritative sources, state assumptions and complete independent analysis for an official assignment.