The Post Office Monthly Income Scheme (MIS) remains a popular small-savings option for people looking for a regular monthly income from their deposits. However, investors planning to open more than one MIS account should understand an important rule before dividing their money across multiple accounts.

An individual is allowed to have more than one Post Office MIS account. But opening several accounts does not mean that the person can invest beyond the maximum limit prescribed under the scheme.

In other words, the investment ceiling is linked to the depositor and the applicable account structure—not simply to the number of accounts opened.

This distinction becomes particularly important for investors who believe they can increase their MIS investment by opening separate accounts at different post offices.

Can One Person Open More Than One MIS Account?

Yes. An investor can open multiple Monthly Income Scheme accounts, subject to the rules governing the scheme.

For example, a person may have one MIS account at one post office and another account elsewhere. Having multiple accounts by itself is not prohibited.

However, all eligible deposits have to remain within the overall investment ceiling applicable to that individual.

Therefore, opening two, three or more accounts cannot be used as a way to multiply the maximum permissible investment.

What Is the Maximum Investment Allowed in Post Office MIS?

Under the applicable Post Office MIS limits, an individual account can hold a maximum investment of ₹9 lakh.

For a joint MIS account, the maximum deposit limit is ₹15 lakh.

The minimum amount required to open an MIS account is ₹1,000, and deposits can be made in multiples of ₹1,000, subject to the scheme's rules.

The important point is that the ₹9 lakh ceiling for an individual cannot be bypassed simply by spreading the investment across several individual MIS accounts.

For example, suppose an investor deposits ₹5 lakh in one individual MIS account. Opening another MIS account would not provide a fresh ₹9 lakh limit. The person's remaining eligible capacity under the individual ceiling would generally be ₹4 lakh.

That is why the total investment matters more than the number of accounts.

How Does the Limit Work With Joint Accounts?

The calculation becomes more important when joint accounts are involved.

Under MIS rules, the share of each joint account holder is considered equal for the purpose of calculating the individual's investment entitlement.

Suppose three people jointly deposit ₹15 lakh in an MIS account. For the purpose of calculating their respective holdings, each person's share would be treated as ₹5 lakh.

If one of those individuals also has an MIS account in their own name, the amount attributable to them through the joint account must be considered while determining the overall permissible investment.

This prevents an investor from using combinations of individual and joint accounts to exceed the prescribed limits.

Multiple Accounts Do Not Mean Multiple Investment Ceilings

This is where some investors may misunderstand the scheme.

Consider a person who opens three individual MIS accounts. They might assume that because each is a separate account, they can deposit ₹9 lakh into each and invest ₹27 lakh in total.

That is not how the investment ceiling works.

The applicable maximum is calculated across the person's eligible holdings. Multiple accounts provide flexibility in managing deposits, but they do not create separate maximum investment allowances for the same investor.

Investors should therefore calculate their total exposure before opening an additional MIS account.

How Much Interest Does Post Office MIS Pay?

For the July-September 2026 quarter, the Post Office Monthly Income Scheme carries an annual interest rate of 7.4%, with interest payable monthly.

At this rate, an investment of ₹9 lakh would generate annual interest of approximately ₹66,600.

That works out to around ₹5,550 per month, subject to the scheme's applicable conditions and tax treatment.

Similarly, a ₹15 lakh deposit in a joint MIS account would generate around ₹1,11,000 in annual interest at 7.4%, equivalent to approximately ₹9,250 per month.

These calculations are straightforward illustrations based on the stated annual rate.

MIS Has a Five-Year Maturity Period

The Post Office Monthly Income Scheme has a maturity period of five years from the date the account is opened.

One of its main features is that interest is paid monthly rather than being accumulated until maturity. This makes MIS particularly relevant for investors looking for periodic cash flow.

The interest can be credited according to the facilities available under the scheme, allowing account holders to use the monthly payout for regular expenses.

Investors should remember, however, that MIS interest is not automatically tax-free. Tax implications depend on the investor's circumstances and prevailing income-tax provisions.

What About Premature Closure?

Although MIS is designed as a five-year investment, premature closure is permitted after the prescribed minimum period, subject to applicable deductions.

An account generally cannot be prematurely closed before completing one year from the date of opening.

If it is closed after one year but before three years, a deduction of 2% of the principal amount applies.

If closure takes place after three years but before the five-year maturity, the deduction is 1% of the principal amount.

Investors who may need their principal at short notice should therefore consider these conditions before depositing a large amount.

What Investors Should Check Before Opening Another MIS Account

Opening multiple Post Office MIS accounts can be useful for managing investments, but it does not provide a way to exceed the scheme's overall investment restrictions.

Before opening an additional account, investors should calculate the amount already deposited in individual accounts as well as the share attributable to them through joint accounts.

The core rule is simple: you may hold multiple MIS accounts, but the applicable maximum investment ceiling still has to be respected across those holdings.

For investors seeking predictable monthly income, the Post Office MIS can provide a straightforward government-backed small-savings option. But understanding the investment ceiling, joint-account calculation, five-year tenure and premature-closure rules is essential before committing funds.