The global shift in retirement architecture from defined benefit (DB) to defined contribution (DC) structures has transferred core financial risk from institutions to individual savers. Within this realignment, the sharpest tension sits in the decumulation phase, where the corpus is converted into sustainable lifetime income.
Flexibility in how the corpus devolves—as lump sum or as regular income—is an attractive idea. But is it wise? Empirical research indicates that unrestricted early access to a lump sum exposes subscribers to severe spend-down risk. Left without institutional guardrails, many subscribers simply lack the cognitive, actuarial and portfolio management skills needed to convert a lump sum into a disciplined income stream.
The Behavioural Risks
3 September 2026
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Mental Accounting And Windfall Effect: A retiree who views the corpus as a lump sum rather than a stream of monthly payouts falls prey to mental accounting. A steady monthly payout is mentally filed as ‘income’ for living expenses, while the lump sum is filed as a ‘windfall gain’. The large corpus relative to past annual income creates an illusion of abundance, decoupling the tax-free lump sum from the larger question of funding an entire retirement. This distortion leaves retirees vulnerable to front-loaded consumption, non-essential lifestyle inflation or family pressure to distribute capital early.
People systematically underestimate their life expectancy, leading many to set unsustainably high drawdown rate from day one
Longevity Underestimation: Sustaining a lump sum requires an individual to accurately estimate own mortality in order to set a safe withdrawal rate (SWR). Behavioural and public health research consistently shows that people systematically underestimate their life expectancy, leading many to set an unsustainably high drawdown rate from day one. This is often compounded by a poor grasp of how long-term inflation compounds to erode the real purchasing power of an unhedged portfolio.
Overconfidence Trap: Retirees who exit structured pension funds often overestimate their ability to out-invest institutional managers or safely navigate complex markets. Research on withdrawal rate psychology shows that overconfident subscribers adopt one of two failure modes—chasing returns through high-risk investments to cover spending shortfalls or hoarding conservatively in low-yield accounts that fail to outpace inflation. Either way, the risk of capital impairment rises sharply.
The UK Pension Freedoms Experiment
The UK’s 2015 Pension Freedoms reform offers a real-world stress test of these behavioural risks. It dismantled a framework that had effectively mandated DC savers to purchase an annuity by age 75, granting individuals aged 55 and above complete autonomy to access their pension pots as full lump sums, staggered extractions or flexible drawdowns. The assumption was that individuals would know or receive sufficient guidance to choose wisely. A decade of longitudinal data confirms that the predicted risks materialised in full.
High Withdrawal Volatility: Data showed unadvised retirees withdrawing at annual rates of 6-8 per cent, well above the accepted 4 per cent SWR benchmark. Roughly 70 per cent of savers managed their pots without any formal advice.
Premature Access: While larger balances tended to move into flexible drawdowns, smaller and medium pots were simply drained as one-off windfalls, which shows that savers were depleting pension wealth to meet mid-life pressures rather than preserving it for old age.
Near-Collapse of Annuity Market: Before the reform, most UK savers defaulted into a guaranteed lifetime income via annuities. After 2015, preferences swung toward liquidity, with annuity purchase volumes falling by roughly three-quarters between 2013 and 2024, removing the default structure and forcing citizens to independently absorb lifelong investment and longevity risk.
Solutions In The Indian Paradigm
As per the National Pension System (NPS) exit architecture, under the Pension Fund Regulatory and Development Authority (PFRDA), subscribers reaching superannuation at 60 can withdraw up to 60 per cent (80 per cent after the December 2025 amendments for non-government subscribers) of the corpus as tax-free lump sum, with the remainder mandatorily annuitised. The single mandatory lump sum payout exposed Indian subscribers to the same behavioural risks seen globally—windfall gains-driven mismanagement, aggressive consumption and familial pressure for capital distribution.
Systematic Lump Sum Withdrawal (SLW): Recognising the windfall effect’s danger, PFRDA introduced SLW, allowing subscribers to stagger the withdrawable 60 per cent over a flexible horizon extending to age 75, with self-defined extraction frequencies (monthly, quarterly or annual), mitigating action bias.
Retirement Income Scheme (RIS): PFRDA’s RIS Steady asset allocation protocol introduces a third pathway for the lump sum. Rather than immediate extraction or self-managed SLW, funds remain invested until age 85. This addresses spend-down risk by sustaining market exposure to beat inflation, while imposing strict drawdown rules and keeping the corpus invested within the NPS ecosystem.
RIS Steady Dynamic Glide Path: A core innovation of RIS, this is an automated, age-linked rebalancing model. To counter allocation errors driven by overconfidence or market panic, RIS Steady has built an equity-to-debt glide path that shifts each year on the subscriber’s birthday, capping equity at 35 per cent at age 60 for appreciation, stepping down to 25 per cent by 65 as preservation takes priority, and bottoming out at 10 per cent between 75 and 85, converting the remaining corpus into a secure, income-generating portfolio.
RIS Drawdown Options: To govern the pace of capital consumption, RIS offers two mutually exclusive drawdown mechanisms that function as behavioural speed bumps.
First, the default Systematic Payout Rate (SPR), where subscribers receive payouts based on a predefined, age-linked rate and recalculated annually on the subscriber’s birthday against the remaining drawdown period through age 85. As the horizon narrows, the payout rate rises correspondingly, keeping cash flows aligned with the portfolio’s actual market value and ensuring the corpus doesn’t hit zero before 85.
Second, Systematic Unit Redemption (SUR), which redeems a fixed number of units at chosen intervals. The payout fluctuates with the fund’s prevailing net asset value (NAV) and is, thus, volatile. It is better suited to subscribers with higher financial literacy and independent income streams.
The Case For Safeguards
The shift from institutional management to individual choice underscores a clear behavioural reality: unrestricted access to large cash pools tends to push people towards immediate consumption.
The UK’s experience shows that. While unconstrained flexibility can boost engagement during accumulation, decumulation demands a structured architecture.
India’s evolution from rigid mandatory annuitisation to guided mechanisms like SLW and RIS offers a modern blueprint, pairing automated glide paths like RIS Steady with disciplined protocols such as SPR, which respects autonomy and long-term dignity without abandoning institutional safeguards. That’s true pension freedom.
Disclaimer: The views expressed are personal and do not reflect the official position of the Authority
By Prodeepto Chatterjee, Deputy General Manager, PFRDA
