One Formula, Two Funds: How an NSSF or PSSSF Pension Is Calculated

Most Tanzanian workers reach the last year of service without ever having seen the number they will retire on. They hear it when the fund pays it — by which point an error in the contribution months or in the recorded salary is no longer worth chasing.

Waiting is not necessary. Both NSSF and PSSSF publish the formula on their own websites, and since the 2022 harmonisation it is the same formula at both funds: months of contribution, an averaged salary, and two fixed constants. This page is the pension calculation file: the formula worked end to end at a real Tanzanian salary, the two funds compared where they genuinely differ, the kikokotoo settled with the instrument numbers, and the channels through which a member checks the record while it can still be corrected.

What formula do NSSF and PSSSF actually use?

NSSF publishes the calculation on its old age pension page as two lines. The lump sum is (1/580 × N × APE) × 12.5 × 33%. The monthly pension is (1/580 × N × APE) × 67% ÷ 12.

PSSSF publishes the same thing in words on its retirement benefit page: the gratuity is 1/580 × months of service × the average highest salary of 36 months × 0.33 × 12.5, and the pension is that same bracket × 0.67 ÷ 12.

It is one calculation with two outputs. The bracket (1/580 × N × APE) is the member’s full annual pension. Everything after the bracket only splits that figure: 33% of its capital value is paid as cash on the day of retirement, and the remaining 67% is paid monthly for life.

How does a member work out the number?

Take a worker retiring with 30 years of contributions on an averaged salary of TZS 800,000 a month. N is 360 months, and APE is TZS 9,600,000 a year.

Step 1 — multiply months by APE. 360 × 9,600,000 = 3,456,000,000.

Step 2 — divide by 580. That figure is the full annual pension. 3,456,000,000 ÷ 580 = TZS 5,958,620.69 a year.

The same answer arrives from the other direction. 360 ÷ 580 is 62.07%, and 62.07% of 9,600,000 is 5,958,620.69. That 62.07% is also 30 years at 2.07% a year, and it sits below the NSSF ceiling of 72.5%, so nothing is capped in this example.

Step 3 — the lump sum. Multiply by 12.5, then take 33%. 5,958,620.69 × 12.5 = 74,482,758.62, and 74,482,758.62 × 33% = TZS 24,579,310.

Step 4 — the monthly pension. Take 67% of the full annual pension, then divide by twelve. 5,958,620.69 × 67% = 3,992,275.86, and 3,992,275.86 ÷ 12 = TZS 332,690 a month.

That worker receives roughly TZS 24.58 million in cash and TZS 332,690 every month for life.

The monthly figure is 41.59% of the salary the pension was calculated on — 62.07% accrued, then 67% of that. Anyone expecting to retire on something near final pay needs to see that ratio while there is still working time left to act on it. The arithmetic is identical for every member: substituting one’s own months and averaged salary into the four steps above reproduces the fund’s own number.

Do NSSF and PSSSF take the same amount from pay?

No. This is the most common wrong assumption in Tanzanian payroll, and it changes take-home pay on both sides of the payslip.

A public servant in PSSSF contributes 5% of salary. A private-sector member of NSSF contributes 10% — double — for a pension calculated by the same formula. The employer carries the difference.

Two rules sit around that split. The NSSF employee share may never exceed 10%; an employer may agree to pay more than its own half, at 15/5 or the whole 20%, but never less. At PSSSF the employee share may not exceed 50% of the total, under regulation 12(5) of Government Notice No. 466 of 2018. What the deduction does to a payslip, alongside PAYE, NHIF and a student loan, is worked line by line in the net salary file.

What is APE, and is it the same at both funds?

APE is annual pensionable emoluments — the averaged salary the formula runs on. It is not final salary, and the two funds define it differently.

NSSF takes the average of the highest three years out of the last ten before retirement. PSSSF takes the average of the highest 36 months’ salary.

Nearly the same idea, but the NSSF definition is bounded by a ten-year window. Where earnings peaked more than ten years before retirement, that peak does not help an NSSF calculation at all. APE moves a pension further than any other input, and it is the input most often wrong on a fund’s records, because it depends on what an employer reported month by month over decades. A member asks the fund in writing which years it has used and what salary it holds for those months.

How many months does a member need, and at what age can they retire?

180 monthly contributions — fifteen years — is the minimum for an old age or retirement pension at either fund. Below 180 months there is no entitlement to a pension at all.

The retirement ages sit in the Social Security Laws (Amendments) Act No. 9 of 2024. Voluntary retirement runs from 55. Compulsory retirement is at 60. Late retirement is available after 60, up to 70, under the amendment that Act made to section 23.

What 180 months means in a broken working life deserves attention. Months in which no contribution reached the fund do not count, however long the employment lasted. The months recorded on the statement decide the entitlement, not the years elapsed since the first job. A worker with twenty years of employment and eleven years of contributions has eleven years in the formula.

For PSSSF, the survivor benefit also requires the deceased member to have contributed at least 180 months, and the beneficiaries are the spouse, children under 21, and parents. That is PSSSF’s published rule. An NSSF member obtains NSSF’s own survivor conditions from NSSF rather than assuming the two funds match.

Is the kikokotoo 33% or 40%?

The rule in force is a 33% lump sum and a 67% monthly pension. The whole position matters here, because half of it is usually missing wherever the question is answered.

The instrument is the Social Security Schemes (Benefits) (Amendment) Regulations, 2022 — Government Notice No. 357 of 2022, made under section 25A of the Social Security Act, Cap 135, gazetted 20 May 2022 and commenced 1 July 2022. It fixes the commutation factor at 12.5, sets the commutation rate at 33 per centum of the annual full amount of the pension, and provides for a monthly pension of 67 per centum of the full pension.

Where 40% comes from. On 13 June 2024, paragraph 58 of the Budget Speech 2024/25 recorded a presidential directive to raise the lump sum from the 33% then in force to 40%. On 26 June 2024 the Minister of State in the Prime Minister’s Office, Deogratius Ndejembi, set out the detail by fund: PSSSF retirees from 33% to 40%, NSSF retirees from 33% to 35%, for the 17,068 people who retired from July 2022 onward, funded by TZS 155 billion in the 2024/25 budget.

Paragraph 57 of the same speech explains the reasoning. The 2022 harmonisation pushed one cohort down from about 50% to 33% and lifted another up from 25% to 33%. The directive partly restored the first group and lifted the second again.

On the worked example above, 33% gives TZS 24,579,310. At 40% the same arithmetic gives TZS 29,793,103, and at 35% it gives TZS 26,068,966.

Those three figures are lump sums and nothing else. The gazetted split pairs a 33% lump sum with a 67% monthly pension, and the TZS 332,690 a month worked out earlier is that 67% figure. A member who retired from July 2022 onward asks the fund in writing for both numbers — the lump sum and the monthly pension — and not the lump sum alone. They are two separate figures, and only the fund can state both against a particular membership record.

How does a member check an NSSF or PSSSF statement?

Every year, not in the last year of service. Errors in contribution months and in recorded salary are correctable while the employer still holds the records and the people who kept them are still in post.

NSSF. SMS to 15200, sending NSSF SALIO (member number) (year) or NSSF BALANCE (member number) (year). The NSSF Taarifa app. WhatsApp on 0756 140 140 — save the number, send “Hello”, then “Statement”. The member portal at portal.nssf.go.tz. The call centre on 0800 116 773.

PSSSF. The PSSSF Kiganjani app, the member portal at memberportal.psssf.go.tz, and the call centre on 0800 110040.

Neither fund publishes a USSD code for a balance check. The channels named above are the ones the funds operate, and a code circulating elsewhere is not one of them.

A statement is also the only way to test whether a deduction became a contribution. Money withheld from a payslip and money received by the fund are two different events, and the gap between them is the single most expensive discovery a member can make at 59. Employer-side remittance duties and the penalties attached to them sit in the payroll compliance file.

What does this formula not cover?

Workplace injury is not an NSSF claim. Employment injury still appears in the NSSF Act’s list of benefits, but it has been administered by the Workers Compensation Fund since 1 July 2015. WCF is funded by a 0.5% employer contribution, and an employee cannot lawfully be required to contribute to it. An injury claim lodged with NSSF costs the injured worker time that the claim itself does not allow for. Registration with WCF, alongside the other employer registrations, is set out in the employer registration file.

The TZS 250,125.9 minimum pension does not belong to an NSSF member. The Treasury-paid minimum monthly pension rose from TZS 100,125.9 to TZS 250,125.9 from July 2025, an increase of 149.8%, recorded at paragraph 119 of the Budget Speech 2025/26. That figure applies to Treasury-paid pensioners, the pre-1999 cohort, and it is neither an NSSF floor nor a PSSSF one. NSSF sets its own minimum pension at 40% of the lowest sectoral statutory minimum wage, which is a different construction and a different number.

The lump sum is paid once. A member planning a retirement around TZS 24.58 million rather than around TZS 332,690 a month is planning around the smaller of the two, measured over any ordinary span of retirement. Where the cash goes afterwards is a separate decision with its own rules — the Treasury securities file covers the government route, and the savings protection file covers which institutions carry protection and which do not.

Mandate-holders this file does not replace

NSSF owns the member record, the contribution history and the old age pension of a private-sector member. PSSSF owns the same for a public servant, together with the survivor conditions it publishes. The Workers Compensation Fund owns employment injury benefit, and has done since 1 July 2015. The Ministry of Finance owns the budget line that funds a directed top-up and the Treasury-paid minimum pension, and the commutation rate itself is set by Government Notice, not by a fund circular. The employer owns the accuracy of the months and the salary it reported, and is the only party able to correct a historical gap in either. Zatra prepares, structures and coordinates the file, grants no licence and does not practise law.

What to confirm before the Client acts

• The number of contributed months on the Client’s own statement, counted against the employment history rather than against the years elapsed since the first job.
• Which years the fund will use for APE — the highest three of the last ten at NSSF, the highest 36 months at PSSSF — and the salary the fund holds for those months, obtained in writing.
• Which commutation rate the fund applies to the Client’s own cohort, and, where the Client retired from July 2022 onward, both the lump sum and the monthly pension figure in the same written reply.
• The shilling figure NSSF holds as its minimum pension, where the Client’s calculated pension falls near that floor.
• Whether every month the employer deducted actually reached the fund, since a deduction shown on a payslip is not a contribution received.
• Whether an injury claim belongs to the Workers Compensation Fund rather than to NSSF, before any form is lodged.