Public bodies in Tanzania buy construction works under the Public Procurement Act of 2023 and its regulations, overseen by the Public Procurement Regulatory Authority (PPRA). The process runs in stages: the procuring entity plans the project in its annual procurement plan, prepares tender documents, advertises through NeST (the national e-procurement system), receives and opens bids, evaluates them, issues a notice of intention to award, waits a standstill period for complaints, then awards and signs the contract. Contractors who understand each stage prepare better bids. Officials who follow each stage get fewer complaints and better contractors.
This is a plain overview, not legal advice. Always check the current Act, regulations and PPRA guidance at ppra.go.tz.
Who is involved?
- The procuring entity: the ministry, agency, council, school or other public body buying the works.
- The accounting officer: heads the entity and is responsible for procurement.
- The procurement management unit: runs the process day to day.
- The tender board: approves key decisions such as the method and award.
- The evaluation committee: evaluates the bids.
- PPRA: regulates, monitors and audits procurement.
- The appeals authority: hears complaints that are not resolved by the entity.
Step 1: Planning and budget
Every procuring entity prepares an annual procurement plan tied to its budget. Construction projects in the plan should have designs, estimates and approvals ready before tendering. Tendering a project with incomplete drawings leads to variations and delays later. Our guide on preparing an institutional construction budget covers the cost side.
Step 2: Choosing the procurement method
The method depends mainly on value and circumstances. Common methods include:
| Method | Typically used when |
|---|---|
| Open tendering (national or international) | The default for most works above set thresholds |
| Restricted tendering | Only a few qualified contractors exist |
| Request for quotations | Small works below a threshold |
| Single source or direct procurement | Strictly limited cases, such as emergencies |
| Force account | The entity carries out works using its own staff and hired labour, under set conditions |
The thresholds and conditions are set in the regulations.
Step 3: Tender documents and advertising
The entity prepares standard tender documents: instructions to bidders, a data sheet, qualification criteria, drawings, specifications, the Bill of Quantities and contract conditions. The tender is advertised on NeST, where contractors download documents and submit bids electronically. A pre-bid meeting or site visit may be held, and any clarifications are issued to all bidders as addenda.
Step 4: Bid submission and opening
Bids are submitted on NeST before the deadline. Late bids are not accepted. Bids are opened at a set time, and the bidders' names and prices are recorded.
Step 5: Evaluation
Evaluation usually runs in stages:
- Preliminary examination: is the bid complete, signed, with the right security and eligible documents?
- Technical evaluation: does it meet the specifications, staff, equipment and experience requirements?
- Financial evaluation: arithmetic corrections, then comparison of evaluated prices.
- Post-qualification: checking that the lowest evaluated responsive bidder can actually perform the contract.
The contract usually goes to the lowest evaluated responsive bid from a qualified bidder, not simply the lowest price on paper. Our tender documents checklist shows what evaluators look for.
Step 6: Notice of intention to award and standstill
The entity notifies all bidders of its intention to award and the reasons. A standstill period follows, during which unsuccessful bidders can complain. If no complaint is upheld, the award proceeds.
Step 7: Contract signing and start
The winning contractor provides a performance security and any other required documents, signs the contract, and receives the site. Construction projects are also registered with the Contractors Registration Board. From here, contract management takes over: supervision, payments, variations and handover.
Preference for local contractors and special groups
Tanzanian procurement law gives preference to local contractors and sets aside opportunities for special groups such as women, youth, the elderly and people with disabilities, under conditions set in the law. Check each tender's data sheet for any margin of preference or reservation that applies.
Complaints and appeals
A bidder who believes the process was unfair first complains to the accounting officer within the time allowed. If unresolved, the matter can go to the Public Procurement Appeals Authority. Keep records and respect deadlines; late complaints are usually rejected.
Tips for procuring entities
- Finish designs and BOQs before tendering.
- Set qualification criteria that match the project, not more.
- Allow enough time for bidders to prepare.
- Supervise the contract properly once it starts. See our guide to site supervision.
Tips for contractors
- Register on NeST and keep your documents current.
- Bid for projects that fit your CRB class and capacity.
- Price honestly. See how to price a construction job.
- Read every addendum.
After award: contract management
Signing the contract is the start of the work, not the end of the process. Public construction contracts are managed through:
- A supervising consultant or in-house engineer who inspects the work and certifies progress.
- Interim payment certificates based on measured work, paid within the period stated in the contract.
- Variation orders approved under the entity's rules before extra work is done.
- Extensions of time where delays are caused by the employer or by events the contract recognises.
- Practical completion, a defects period and a final certificate, as on private projects. See construction handover.
Late payment of certificates is one of the biggest problems contractors face on public work. Clear records of every certificate and its due date help when following up. Our guide on cash flow for construction companies covers how contractors plan around it.
Frequently asked questions
What is NeST?
NeST is the National e-Procurement System of Tanzania, the online platform public bodies use to advertise tenders and receive bids.
Does the lowest price always win?
No. The contract normally goes to the lowest evaluated bid that is responsive and from a qualified bidder. An incomplete or non-compliant low bid is rejected.
Can a contractor complain about an award?
Yes. Complaints go first to the procuring entity's accounting officer, then to the appeals authority, within set deadlines.
Who regulates public procurement in Tanzania?
The Public Procurement Regulatory Authority (PPRA).
Working on a public project?
Vika Construction delivers building and civil works for public institutions across Tanzania. Contact us to talk about your project.
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