Sukanya Samriddhi, NSC and the post office

The post office runs a set of schemes that between them cover most savings horizons. Presented individually they look like a confusing list; presented as a grid they are obviously organised by term and who the saver is.

The set

Scheme	Maturity	The binding details
Post Office Savings Account	None	Minimum ₹500, no maximum
Recurring Deposit	5 years	Min ₹100 a month, no max; premature close after 3 years
Time Deposit	1, 2, 3 or 5 years	Min ₹1,000; interest computed quarterly, paid annually
Monthly Income Account	5 years	Min ₹1,000; max ₹9 lakh single, ₹15 lakh joint; interest paid monthly
Senior Citizen Savings Scheme	5 years	Min ₹1,000, max ₹30 lakh; interest paid quarterly
National Savings Certificate (VIII)	5 years	Min ₹1,000, no maximum
Kisan Vikas Patra	Variable	Min ₹1,000, no max; money doubles on maturity; encashable after 2½ years
Public Provident Fund	15 years	₹500 to ₹1.5 lakh a year (chapter 4)
Sukanya Samriddhi Account	21 years	₹250 to ₹1.5 lakh a year

Two columns do most of the work. Maturity tells you which horizon the scheme is for, and the maximum tells you whether it can hold a meaningful amount.

Three that are genuinely distinctive

Senior Citizen Savings Scheme carries a ₹30 lakh ceiling with quarterly interest, which makes it the only small savings scheme that can hold a retirement corpus and pay from it. For a retired household it is usually the first thing to fill.

Monthly Income Account pays monthly, which matters to anyone living on their capital — but the ceiling is ₹9 lakh single or ₹15 lakh joint, so it supplements an income rather than providing one.

Kisan Vikas Patra is quoted as "money doubles on maturity" rather than as a rate, with a maturity that moves as the rate changes. That is a framing worth noticing: Anchoring and framing in Behavioural finance explains why "doubles your money" lands harder than the equivalent annual rate, and the honest comparison requires converting it back — a doubling tells you nothing until you know over how many years.

NSC has no maximum, which makes it the post office's general-purpose five-year instrument.

Sukanya Samriddhi, in detail

The scheme for a girl child, and the most constrained of the set.

• ₹250 minimum, ₹1.5 lakh maximum in a financial year
• opened in the name of a girl child until she attains ten years of age
• only one account per girl child
• available at post offices and authorised banks, and transferable anywhere in India
• withdrawal allowed for the account holder's higher education, to meet education expenses
• premature closure on her marriage after she attains eighteen
• matures twenty-one years from the date of opening

Note the asymmetry in the clock: unlike PPF, maturity runs from the date of opening, not from the end of the financial year.

The scheme's design intent is visible in its restrictions: the money is for her, it cannot be opened late, there can only be one, and the two exits are education and marriage. It is a commitment device with a statutory rate attached, and its weakness is the same as its strength.

Working the problem

An account opened for a daughter aged 2.

Maturity: twenty-one years from the date of opening, so when she is about 23.

First access: withdrawal is permitted for her higher education, and the scheme provides that half the balance may be withdrawn for that purpose after she attains eighteen or passes the tenth standard, whichever is earlier. Premature closure is available on her marriage after eighteen.

Why it cannot be the whole plan. Line up the dates against when the money is actually needed:

Need	Her age	What SSA provides
School fees throughout	3–17	Nothing — no access
Undergraduate fees	18–21	Partial withdrawal for higher education
Postgraduate fees	22–24	Maturity at ~23

The mismatch is in the middle rows. Undergraduate education — the largest single education expense for most families — begins at about 18, when only a partial withdrawal is available, and the account does not mature until about 23. If the plan is to fund a degree starting at 18, SSA can contribute part of it and cannot fund it.

And the ceiling compounds the problem. The ₹1.5 lakh annual maximum is shared with the same overall allowance PPF competes for, so a household cannot simply fill both to the brim and treat the matter as settled.

What the plan actually needs is SSA for the long tail — her postgraduate study, or her own capital at 23 — plus something with a horizon that matches 18, which means an instrument you can exit at a date you choose. That is the honest conclusion, and it follows from the maturity table rather than from any view about the scheme's rate.

One thing SSA does better than any alternative: because it cannot be opened after she turns ten and cannot be casually broken, it protects the money from the household's own future decisions. For a family that doubts its own discipline, that constraint is worth paying for — which is the Designing around yourself argument from Behavioural finance, in statutory form.

How to choose among these

By horizon first, not by rate. The rates across these schemes are set by the same authority within a narrow band; the maturities differ enormously. Choosing on rate and discovering the lock-in afterwards is the common error.

Then by ceiling. A scheme that cannot hold the amount you have is not a candidate however attractive its terms.

Then by payout shape. Monthly, quarterly, annual or at maturity — this decides whether the scheme can serve someone spending the income.

Then by rate. By the time the first three are applied there is usually only one sensible candidate left, which is the point.

The point

The post office schemes form a menu organised by maturity and by who the saver is, not a set of competitors to be ranked by rate. SCSS is the only one with a ceiling high enough to hold a retirement corpus and pay from it quarterly; MIS pays monthly but is capped too low to live on; NSC is the uncapped five-year default; KVP quotes a doubling rather than a rate, which should be converted before comparing. Sukanya Samriddhi matures twenty-one years from opening with partial access for higher education, so for a two-year-old it arrives after undergraduate fees fall due and cannot be the whole of an education plan.