From Local Mines to Sovereign Reserves: What BoT’s Gold Strategy Means for Tanzania

The Bank of Tanzania’s gold reserve strategy is becoming one of the most important monetary policy stories in Tanzania. It marks a shift in how the country treats gold: not only as an export commodity, but as a sovereign financial asset that can strengthen foreign reserves, support confidence in the shilling and deepen the formalization of the mining economy. For many years, Tanzania’s gold largely moved through the economy as an export product. Miners produced it, exporters sold it, and the country earned foreign exchange through the external trade channel. The Domestic Gold Purchase Program changes that structure. Through the programme, the central bank buys part of Tanzania’s locally produced gold, refines it to internationally accepted bullion standards, and converts it into reserve assets on the Bank’s balance sheet. That is a significant policy evolution. Gold sold abroad generates export earnings. Gold purchased and held by the central bank becomes part of the country’s reserve architecture. It can sit alongside foreign currency assets, Special Drawing Rights, marketable securities and other reserve instruments. In an economy exposed to import demand, exchange-rate pressure, external shocks and commodity-price cycles, this gives the Bank of Tanzania a broader set of reserve tools. The latest public balance-sheet data show how rapidly the position has expanded. The Bank of Tanzania’s annual accounts for 2024/25 showed that, as of 30 June 2025, gold held at the Bank of Tanzania pending transfer to a foreign custodian was valued at about TZS 1.52 trillion. Monetary gold deposited with the Bank of England was valued at about TZS 174.9 billion, up from TZS 72.5 billion in 2024. At that point, the Bank of England-specific holding was still a relatively small part of the total disclosed gold position, while a much larger value was held domestically pending transfer to a foreign custodian. More recent monthly data show a much larger gold balance. By 31 May 2026, the Bank of Tanzania’s public Statement of Financial Position reported TZS 3.14 trillion in Monetary Gold and TZS 5.84 trillion in Bullion Gold. Combined, gold-related assets stood at about TZS 8.98 trillion. That figure is materially higher than the gold reserve position disclosed in the June 2025 annual report and points to a rapid accumulation of gold on the Bank’s balance sheet. The programme appears to have accelerated further by July 2026. Governor Emmanuel Tutuba was reported as saying that, over the previous 18 months, the Bank of Tanzania had purchased and stored about 28 tonnes of gold valued at USD 3.68 billion, equivalent to about TZS 9.76 trillion. That figure is broadly consistent with the May 2026 balance sheet, which already showed nearly TZS 9 trillion in combined Monetary Gold and Bullion Gold before the July public statement. The first economic implication is reserve diversification. Central banks hold reserves to meet external payment obligations, smooth foreign-exchange pressure, preserve confidence and respond to shocks. Foreign currency assets are liquid and essential, but they are exposed to currency, interest-rate and issuer-country risks. Gold adds a different quality to the reserve portfolio. It is not the liability of another sovereign issuer, and it often becomes more attractive during periods of geopolitical tension, inflation concern or global financial uncertainty. For Tanzania, this matters because the country needs a strong external buffer. The Bank of Tanzania’s 2024/25 report showed foreign reserves rising to USD 5.97 billion by June 2025, from USD 5.35 billion a year earlier, enough to cover 4.8 months of imports. The report linked future reserve adequacy to export promotion, import substitution and the ongoing gold purchase programme. This places gold accumulation inside a wider external-sector strategy, not as a stand-alone symbolic policy. The second implication is support for the shilling. Gold reserves do not mechanically determine the exchange rate. The value of the shilling is shaped by exports, imports, capital flows, foreign-exchange liquidity, confidence, inflation and monetary policy. But a larger and more diversified reserve position can strengthen confidence in the central bank’s ability to manage periods of external pressure. When markets see that the monetary authority has more usable reserve assets, the perception of vulnerability can decline. The third implication is mining-sector formalization. A central bank purchase programme creates a formal buyer for local gold, particularly if payment terms are competitive. Governor Tutuba has said the Bank pays miners and traders within 24 hours and uses the London gold market price of the day. That matters because one of the risks in gold-producing economies is leakage through informal channels, smuggling, underdeclaration and weak traceability. A credible official buyer can pull more transactions into the formal financial system. This formalization effect is not theoretical. BoT’s July 2026 communication states that the programme has supported the opening of more than 4,000 accounts in financial institutions, including banks. That means the gold purchase strategy is also functioning as a financial inclusion tool for mining-sector participants. Miners and traders who previously operated in cash-heavy or informal channels can begin building bank records, payment histories and compliance footprints. The fourth implication is value retention. Tanzania is a major gold producer, but without a domestic reserve-purchase framework, most of the monetary value of gold is realized through exports. By purchasing part of the output, the central bank allows the country to retain a portion of its mineral wealth in financial form. The gold may eventually be refined, custodied abroad, or integrated into international reserve operations, but the ownership remains with Tanzania. This changes the policy question from “how much gold did Tanzania export?” to “how much of Tanzania’s gold wealth is being converted into national balance-sheet strength?” The fifth implication concerns the Bank of England. The fact that some of Tanzania’s monetary gold is deposited with the Bank of England should not be interpreted as a loss of ownership. Central banks commonly use established international custodians for reserve assets. The Bank of England provides gold custody services to central banks, and its public explanation says customer gold is stored on an allocated basis, meaning the customer retains title to specific bars rather than holding only a general claim against the Bank. The main advantage of storing gold in London is liquidity. The Bank of England sits at the centre of one of the world’s most important gold markets. Gold held in a recognized custody location and refined to accepted standards is easier to value, trade, swap, pledge or mobilize as part of reserve management. For a central bank, a reserve asset must not only exist physically; it must also be usable under credible market conditions. There is also a standards advantage. BoT’s annual report says locally purchased gold is to be refined to London bullion standards to increase monetary gold and strengthen foreign reserves. This is important because raw gold or locally held bullion does not automatically function as international monetary gold. To become a high-quality reserve asset, it must meet recognized standards on purity, form, documentation, custody and auditability. However, foreign custody also carries policy sensitivities. Gold is a politically symbolic asset. Citizens may reasonably ask why gold mined in Tanzania should be stored abroad. The answer is that foreign custody can improve liquidity, market access and reserve credibility, but it must be balanced against sovereignty concerns, operational dependence and geopolitical risk. The question is not whether Tanzania should store gold abroad or at home. The stronger policy approach is to define how much should be held abroad for liquidity and how much should be held domestically for resilience. That balance is becoming more important globally. Central banks still use London because it offers deep market access, but many are also reviewing custody diversification and domestic storage. Tanzania’s own strategy should therefore avoid over-concentration. A prudent reserve policy would combine London-based liquidity with strong domestic vaulting, refining, auditing, insurance, security and reporting capacity. The sixth implication is valuation risk. Gold can strengthen a reserve portfolio, but it is not risk-free. Its price can rise sharply when global investors seek safety, but it can also fall. A reserve portfolio with more gold will benefit when gold prices rise, but it will also experience valuation changes when prices decline. Policymakers should therefore treat gold as a reserve stabilizer, not as a guaranteed income source. The seventh implication is monetary management. When BoT buys gold locally, it pays miners and traders in Tanzanian shillings. If purchases are large, they can inject liquidity into the domestic economy. That liquidity may need to be managed through monetary operations so that gold accumulation does not conflict with inflation control, liquidity conditions or interest-rate objectives. A successful gold reserve strategy therefore requires coordination between reserve management, mining policy and monetary policy. The eighth implication is institutional credibility. The Domestic Gold Purchase Program will be judged not only by the tonnes purchased, but by the transparency of the programme. The central bank should continue publishing data on gold quantities, value, classification between Bullion Gold and Monetary Gold, refining status, custody location, valuation changes, audit procedures and reserve-management objectives. This will reduce speculation and help the public understand the difference between ownership, storage, custody and liquidity. The broader reading is that Tanzania is using gold to connect three policy areas that are often treated separately: mining-sector development, foreign reserve management and monetary stability. That makes the strategy more sophisticated than a simple gold-buying exercise. It turns domestic mineral output into a national financial buffer. The Bank of England custody arrangement fits within that strategy, but it should be explained carefully. London storage gives Tanzania access to liquidity, recognized custody infrastructure and international bullion-market credibility. It does not mean Tanzania has surrendered ownership of the gold. At the same time, the country should continue building domestic capacity so that it is not only a gold producer, but also a serious manager of gold as a sovereign reserve asset. The central implication is that Tanzania’s gold is moving higher up the financial chain. It is moving from mined output to formal purchase, from formal purchase to refined bullion, from refined bullion to monetary gold, and from monetary gold to reserve strength. If executed well, the strategy can strengthen foreign reserves, support confidence in the shilling, formalize parts of the mining economy, deepen financial inclusion for miners and improve resilience to external shocks. If executed poorly, it could create liquidity pressure, valuation risk, custody concerns and public misunderstanding. The direction is strategically sound. The test will be transparency, custody balance, monetary discipline and the ability to keep converting Tanzania’s mineral wealth into durable national financial strength.