Progreso Dredging Finance: The 15% Advance and the First Progress Payment

A smaller advance against the annual allocation

ASIPONA Progreso reduced the annual advance for its 40-hectare north-platform dredging tender from 30% to 15%. The change appears in the 8 September clarification minutes and is repeated in the resumed meeting on 9 September. For 2026, the percentage applies to the authorised annual amount, with VAT added; the subsequent year's advance follows the bidder's programmed amount [1, pp.1-2; 2, pp.1-2]. Compras MX's general-data field still displayed the earlier 30% when checked on 3 November ^[6].

The same questions fix the scale of the financing problem. The owner required a 2026 execution programme that would spend MXN 862,068,965.51. Applying the amended 15% to that base gives MXN 129,310,344.83 before VAT. With a 1.16 gross multiplier, the result rounds to MXN 150 million, matching the 2026 advance-guarantee amount printed in the award [1, p.6; 3, p.28].

On that identical base, the former 30% would have produced MXN 300 million including VAT. The amendment removes MXN 150 million from the advance-based funding assumption. The amount a contractor must replace with its own cash or borrowing then depends on the timing of costs, progress receipts and advance recovery. That calculation belongs alongside the production estimate.

IMWO arithmetic comparison. The award prints the MXN 150 million 2026 advance guarantee; the 30% line holds the annual base and gross multiplier constant.

The estimate clock follows the work

The clarification record describes six calendar days to submit an estimate after its cutoff, fifteen days for approval and twenty days for payment. The owner adds these to give 41 calendar days. The quoted procedure also provides for unresolved technical or numerical differences to enter the following estimate [1, p.4; 2, p.4].

A later answer uses a different starting point: 41 days after presentation of the estimate. In that answer, the owner retains the requirement to assume receipt of the first estimate in the third month when calculating financing. A bidder's cash forecast therefore needs both the production period before cutoff and the payment sequence after it [1, pp.6-7].

An illustrative 31 October cutoff exposes the difference. Submission on 6 November, followed by fifteen approval days and twenty payment days, reaches 11 December. Counting 41 days from the same 6 November submission reaches 17 December. Both examples use elapsed calendar days; the six-day difference comes entirely from the starting event.

The operative payment instruction needs to settle that event before a contractor relies on either date. Meanwhile, a financing sensitivity should retain both readings. The cash required to carry six additional days depends on the outstanding balance at that point, including payroll, fuel, plant hire and subcontractor invoices. The tender's third-month assumption also needs to remain in the submitted financing analysis.

IMWO timing illustration, using the two formulations in the clarification record. These dates are scenario outputs; the actual payment instruction and estimate records determine the project's payment dates.

Surveys and bank formation shape the cash curve

N10 combines construction dredging with formation of the north platform. The site-visit record describes a presentation of excavation and placement areas before the site inspection. In the clarification meeting, the owner issued updated placement-area drawings because parts of the area had positive elevations. That answer retained the bill quantities and specifications; another answer required the winner to carry out an initial bathymetric survey for a quantity check [4, p.2; 1, p.7].

A financing model needs the same excavation surfaces and receiving areas as the plant programme. If a workfront accumulates fuel and vessel costs while its measured quantity is being checked, expenditure continues ahead of certification. Allocate survey work, volume calculations and submission dates to the relevant cut, so the cash forecast reflects the production that can enter each estimate.

The owner allowed control surveys, bathymetry, drawings and volume calculations to be itemised as direct costs, with the same resources excluded from indirect costs. It also required itemised direct treatment for terrestrial plant mobilisation associated with the perimeter-bank stone work. These answers affect both rate composition and the timing of early expenditure [1, p.4].

Dredging International Mexico raised the import, navigation-permission and mobilisation lead time in its financing questions, citing a 15-30-day period. The owner retained the third-month receipt assumption and the annual spending requirement [1, p.6]. For a bid, the vessel's arrival date, survey readiness, bank works and first certifiable quantity should feed one schedule, with the financing requirement recalculated whenever one of those dates moves.

Guarantees use a different credit facility

The award selects Mexicana de Dragados at MXN 1,080,535,398.26 excluding VAT. It requires an advance guarantee of MXN 150 million including VAT for 2026 and MXN 38,013,159.30 including VAT for 2027. Electronic advance payment follows presentation and approval of the relevant guarantees [3, pp.27-28].

The performance guarantee is stated separately at 20% of the contract amount: MXN 216,107,079.65 plus VAT. A civil-liability guarantee has its own amount and purpose. The financing plan therefore needs two sets of lender terms: the facility providing cash for expenditure and the facility supporting bonds or guarantees. Premiums, collateral, available limits and release conditions determine how those facilities interact.

The award also tests financial capacity against two months of planned work, a working-capital floor equal to 1% of the price, and balance-sheet coverage ratios [3, p.23]. Passing those tests establishes the tender's financial evaluation result. The cash forecast still has to cover each expenditure date, and the guarantee facility has to remain available when the advance instrument is issued.

One printed security clause requires clarification. The environmental guarantee states 10% numerically and gives MXN 108,053,539.83 plus VAT, while its words say thirty percent [3, p.28]. That discrepancy affects the instrument a surety would prepare. Obtain the corrected requirement before committing guarantee capacity or calculating its cost.

The evaluated price needs a financing allowance

For scale, assume an additional MXN 150 million is financed for sixty days at an annual simple-interest rate of 12%, using a 365-day year. The resulting sensitivity is MXN 2.96 million. The amount, rate and duration are illustrative inputs; a project calculation should apply its borrowing terms to the daily incremental funding balance.

The required 2026 programme amount equals approximately 79.8% of the winning price before VAT, while the original 290-day programme extends from 12 October 2026 to 28 July 2027 [1, p.6; 3, p.29]. The fiscal requirement therefore concentrates the planned outlay early in the contract. Advance recovery, certified production and payment dates need to explain how that spending profile is achieved.

At the 22 September opening, four priced offers were recorded; the subsequent award takes one technically eligible offer through economic evaluation [5, p.2; 3, pp.26-27]. The award price by itself supplies little information about the bidder's funding cost. The commercial comparison needs the amended advance, the certification clock and the resource programme on the same basis.

IMWO recommends that the buyer issue one consolidated financing schedule with the amended annual advance bases, guarantee requirements, estimate cutoff, approval period, payment starting event and advance-recovery rule. Bidders should reconcile that schedule to workfront quantities and test a later first receipt before fixing their rates. The comparison then exposes the cost of the payment terms alongside excavation, transport and bank formation.