· INTELLIGENCE PLATFORM

The Enhanced Waterfall

An Illustrative Fiscal-Capture Model for Gas-to-Shore and the New Refinery — Inside Suriname’s Sovereign Cash Waterfall, 2026–2050

GLIAG Flagship Essay · 12 August 2026
Second Companion to GG-2026-029-NScA, “Debt Before Oil” · Extends GG-2026-030-VBW, “Value Beyond the Wellhead”
STANDFIRST

Value Beyond the Wellhead (GG-2026-030-VBW) classified Gas-to-Shore (GtS) and New Refinery (NR) value into three layers and found that Layer B — the share of that value which would actually reach the Suriname state treasury as tax, royalty, or dividend, and could therefore legitimately be added to the sovereign cash waterfall — could not be modelled, because no corporate tax rate, royalty schedule, or equity/dividend split for either project has ever been published.

This companion GLIAGOGRAPH answers a direct follow-on question: if a specific fiscal-capture mechanism did exist, how much would it add to Net Sovereign Cash Available (NSCA) over 2026–2050, and would it change the 2028 first-oil financing trough that Debt Before Oilidentified as Suriname’s tightest coverage point? The answer requires building Layer B for the first time — not as a sourced fact, because none exists, but as an explicitly labelled, falsifiable illustrative scenario, built on an assumed capture-rate grid applied to GtS and NR’s already-canonical Layer C macro value. Every dollar in this document is either traceable to a cited GLIAG source or flagged as an analyst assumption; none is invented and passed off as fact.

CANONICAL · SOURCED FIGUREASSUMPTION · ANALYST-SET, FALSIFIABLE

Section 01From “Not Modelled” to “Modelled as an Assumption”

Value Beyond the Wellhead was correct to decline to put a number on Layer B: doing so without a sourced fiscal parameter would have meant inventing one. Nothing in this essay changes that underlying fact. The four inputs identified in VBW Section 5 as prerequisites for a sourced Layer B still do not exist in any reviewed GLIAG or public work product:

1. the applicable corporate income tax rate for GtS midstream and NR entities under Suriname’s petroleum fiscal regime;
2. any royalty obligation attaching to domestically monetised gas or refined product sales;
3. the government’s or Staatsolie’s actual equity/dividend participation percentage in the GtS midstream SPV and the NR refinery SPV;
4. the timing of first government cash receipt from each project relative to the 2028 DSCR trough.

LAYER ANet Sovereign Cash Available from petroleum production. Modelled and published in Debt Before Oil. Unchanged here.

LAYER BThe share of GtS and NR value reaching the treasury. Previously unmodelled. Built here as an explicit assumption.

LAYER CMacro and BPM6 benefit to the national economy. Canonical, already on the record, and the base of this model.

What changes here is the question being asked. Instead of “what is Layer B,” this essay asks what would Layer B need to look like, in scale and timing, to matter to the sovereign waterfall — a legitimate sensitivity exercise as long as the assumption driving it is stated in the open, sized with a range rather than a false-precision point estimate, and never merged silently into Layer A.

Section 02Methodology: Two Canonical Macro Bases and an Illustrative Capture-Rate Grid

Two Layer C figures, both canonical and already published in Value Beyond the Wellhead, form the base of this model:

BASE	VALUE
Gas-to-Shore macro base	US$250 million/year in avoided fuel imports (base case) — the audited Rev2.6/Rev27 figure, corroborated in “Navigating the GSB” (6 August 2026)
New Refinery macro base	US$583 million/year BPM6 current-account swing (base case), from GLIAG’s New Refinery Imperative BPM6 model, within the published US$433–770 million/year range

To convert a slice of this macro value into an illustrative sovereign fiscal receipt, this essay applies an assumed capture-rate grid — Low 15%, Central 25%, High 35% — to the phased-in macro base for each project.

ASSUMPTION · STATED IN THE OPEN

This capture rate is a GLIAG analyst assumption, not a published fiscal parameter. It does not derive from any specific Suriname corporate tax rate, royalty formula, or dividend agreement — none has been published, per Section 1. It represents an illustrative order-of-magnitude range for how much of a macro/BPM6 benefit a government might plausibly capture as fiscal revenue once a specific instrument is designed, informed by the general observation that petroleum-sector fiscal takes in comparable jurisdictions typically fall in a similar band, but it is not a forecast, a policy proposal, or a GLIAG recommendation for any specific rate.

Every figure downstream of this assumption in Section 4 and Annex A is conditional on it and is reported as a range, never as a single confirmed number.

Section 03Phase-In Schedule

Capture is applied only once each project is assumed to be generating its macro benefit, phased in along the same development-phase timeline used across the companion GLIAGOGRAPH series — pre-production build-up 2026–2027; GranMorgu ramp-up 2028–2030; GtS early monetisation 2031–2032; NR phase-in and value capture 2032–2035; normalisation and sovereign cash stabilisation 2036–2050:

PROJECT	RAMP SCHEDULE
GtS ramp	20% of the US$250 million/year base in 2031, rising 20 points a year to 100% (full US$250 million/year) from 2035 onward
NR ramp	20% of the US$583 million/year base in 2032, rising 20 points a year to 100% (full US$583 million/year) from 2036 onward

Before 2031, both projects contribute zero — an important constraint, not an oversight: neither GtS nor NR is assumed to generate any capturable value before Suriname’s 2028 first-oil financing trough.

Section 04Results: The Enhanced Sovereign Cash Waterfall, 2026–2050

Applying the Central (25%) capture-rate case to the phased macro bases and adding the result to the unchanged Layer A NSCA from Debt Before Oil produces the following headline path (US$ million; DSCR in parentheses):

YEAR	BASE NSCA (DSCR)	ENHANCED NSCA CENTRAL (DSCR)	ILLUSTRATIVE UPLIFT (RANGE)
2028 · first oil	−57.1 (0.89×)	−57.1 (0.89×) — unchanged	Zero — uplift arrives 3 years too late
2030	923.6 (1.88×)	923.6 (1.88×) — unchanged	Zero — ramp has not yet begun
2032	2,237.0 (5.37×)	2,291.2 (5.48×)	US$54.2M (US$32.5–75.8M)
2035 · Eurobond maturity	2,181.6 (2.26×)	2,360.7 (2.37×)	US$179.1M (US$107.5–250.7M)
2040	3,121.0 (48.72×)	3,329.2 (51.91×)	US$208.2M (US$124.9–291.5M)
2050	856.4 (n/a)	1,064.6 (n/a)	US$208.2M (US$124.9–291.5M)

The 2040 uplift is meaningful in absolute dollars but marginal in ratio terms, because Base DSCR is already extremely high once Eurobond amortisation is nearly complete. In 2050, DSCR is not meaningful in either case: scheduled debt service is zero from 2041 onward.

CUMULATIVE 2026–2050

Base NSCA sums to US$49,424.1 million. Under the illustrative capture-rate grid, cumulative Enhanced NSCA over the same window is US$51,585.8 million (Low, +US$2,161.7 million, +4.4%), US$53,026.9 million (Central, +US$3,602.8 million, +7.3%), and US$54,467.7 million (High, +US$5,043.6 million, +10.2%). The full year-by-year path for all three scenarios is reported in Annex A.

Section 05What This Model Does Not Show

This is a sensitivity exercise, not a forecast, and three limits must be read alongside the headline numbers above.

First, the capture rate (15/25/35%) is an assumption, not a derived or sourced fiscal parameter — a different assumption produces a proportionally different uplift, and nothing here should be cited as “GLIAG projects the government will receive X.”

Second, the model does not resolve timing risk: it assumes GtS and NR reach commercial operation on the phase-in schedule in Section 3, which is itself an illustrative planning assumption, not a project-sanctioned schedule.

Third, and most importantly, the model confirms rather than cures the finding in Debt Before Oil: Suriname’s most acute sovereign financing exposure is the 2028 first-oil trough, and no combination of GtS or NR capture — at any plausible rate, on any plausible schedule — reaches the treasury in time to relieve it, because neither project is assumed capable of generating capturable value before 2031 at the earliest.

Whatever fiscal instrument Suriname ultimately designs for Gas-to-Shore and the New Refinery, it will address 2031 onward, not 2028.

Section 06Reading Across the Three Companion GLIAGOGRAPHs

Debt Before Oil (GG-2026-029-NScA) modelled Layer A and located the 2028 trough. Value Beyond the Wellhead (GG-2026-030-VBW) classified GtS and NR value into three layers and correctly declined to model Layer B without a sourced fiscal parameter. This essay (GG-2026-031-ENSCA) models Layer B as an explicit, range-bound, falsifiable assumption to show decision-makers the plausible scale of what a real fiscal-capture mechanism could contribute — roughly US$2.2–5.0 billion cumulative over 2026–2050, centred near US$3.6 billion — while being explicit that the number is only as good as the 15–35% assumption behind it, and that it does nothing for the 2028 trough regardless of where within that range the true rate eventually falls.

The task the series leaves for Suriname’s institutions is unchanged from VBW: design and publish the actual tax, royalty, or dividend instrument, at which point this illustrative Layer B can be replaced with a sourced one.

NOTE ON AN UNVERIFIED REFERENCE GRAPHIC

A graphic circulating under the doc code “GG-2026-030-NScA-NR-GtS” — a code that collides with the already-published GG-2026-030-VBW — displays an “Enhanced NSCA with NR + GtS” line and incremental capture figures (illustratively, on the order of US$80–350 million/year for GtS and US$120–420 million/year for NR, with combined uplift cited near US$600 million/year by 2035 and US$770 million/year by 2040) alongside a photograph and a detailed regional map.

None of those specific uplift figures, their derivation, or their capture-rate assumption trace to any canonical GLIAG figure, source, or methodology reviewed for Debt Before Oil, Value Beyond the Wellhead, or this essay, and they are not reproduced here. This document’s own illustrative uplift range (Section 4) was built independently from the canonical Layer C macro bases already on the record and should not be read as a reconciliation or confirmation of that graphic. Per standing GLIAG house style, this document also uses no photograph of any person and no detailed map — only the standard monogram and a schematic location marker.

KEY TAKEAWAY

If Suriname designed and published a specific fiscal-capture mechanism for Gas-to-Shore and the New Refinery today, an illustrative 15–35% capture rate on their already-canonical macro value could plausibly add US$2.2–5.0 billion (central estimate ≈ US$3.6 billion) to the sovereign cash waterfall over 2026–2050. It would not change Suriname’s 2028 first-oil financing trough, DSCR 0.89×, which arrives before either project is assumed capable of generating a single dollar of capturable value.

ANNEX A — DATA REGISTER: YEAR-BY-YEAR ENHANCED WATERFALL, 2026–2050

Low 15% / High 35% uplift bands are reported in the note beneath the table. All values in US$ million.

#	YEAR	BASE NSCA	GTS BASE	NR BASE	UPLIFT CENTRAL	ENH. NSCA CENTRAL	BASE DSCR	ENH. DSCR CENTRAL
1	2026	−324.5	0.0	0.0	0.0	−324.5	n/a (pre-production)	n/a
2	2027	−324.5	0.0	0.0	0.0	−324.5	n/a (pre-production)	n/a
3	2028	−57.1	0.0	0.0	0.0	−57.1	0.89×	0.89×
4	2029	551.2	0.0	0.0	0.0	551.2	2.02×	2.02×
5	2030	923.6	0.0	0.0	0.0	923.6	1.88×	1.88×
6	2031	1,830.3	50.0	0.0	12.5	1,842.8	4.44×	4.47×
7	2032	2,237.0	100.0	116.6	54.2	2,291.2	5.37×	5.48×
8	2033	2,127.9	150.0	233.2	95.8	2,223.7	3.11×	3.21×
9	2034	3,089.9	200.0	349.8	137.4	3,227.4	8.16×	8.48×
10	2035	2,181.6	250.0	466.4	179.1	2,360.7	2.26×	2.37×
11	2036	3,658.5	250.0	583.0	208.2	3,866.8	14.09×	14.83×
12	2037	3,668.5	250.0	583.0	208.2	3,876.8	45.96×	48.51×
13	2038	3,486.0	250.0	583.0	208.2	3,694.2	46.75×	49.48×
14	2039	3,303.5	250.0	583.0	208.2	3,511.8	47.66×	50.60×
15	2040	3,121.0	250.0	583.0	208.2	3,329.2	48.72×	51.91×
16	2041	2,998.5	250.0	583.0	208.2	3,206.8	n/a (zero scheduled debt service)	n/a
17	2042	2,810.6	250.0	583.0	208.2	3,018.8	n/a	n/a
18	2043	2,622.7	250.0	583.0	208.2	2,831.0	n/a	n/a
19	2044	2,434.8	250.0	583.0	208.2	2,643.0	n/a	n/a
20	2045	2,171.8	250.0	583.0	208.2	2,380.0	n/a	n/a
21	2046	1,908.7	250.0	583.0	208.2	2,117.0	n/a	n/a
22	2047	1,645.6	250.0	583.0	208.2	1,853.8	n/a	n/a
23	2048	1,382.6	250.0	583.0	208.2	1,590.8	n/a	n/a
24	2049	1,119.5	250.0	583.0	208.2	1,327.8	n/a	n/a
25	2050	856.4	250.0	583.0	208.2	1,064.6	n/a	n/a
Cumulative 2026–2050		49,424.1	—	—	3,602.8	53,026.9	—	—

Low (15%) / High (35%) uplift and Enhanced NSCA by selected year (US$ million): 2031: uplift 7.5 / 17.5, Enhanced NSCA 1,837.8 / 1,847.8. 2032: 32.5 / 75.8, 2,269.5 / 2,312.8. 2033: 57.5 / 134.1, 2,185.4 / 2,262.0. 2034: 82.5 / 192.4, 3,172.4 / 3,282.3. 2035: 107.5 / 250.7, 2,289.1 / 2,432.3. 2036–2050 (flat run-rate each year): 124.9 / 291.5 uplift; Enhanced NSCA accordingly ±US$83.3 million around the Central case in each of those fifteen years.

Cumulative totals, 2026–2050 (US$ million): Base NSCA 49,424.1. Enhanced Low 51,585.8 (+2,161.7, +4.4%). Enhanced Central 53,026.9 (+3,602.8, +7.3%). Enhanced High 54,467.7 (+5,043.6, +10.2%).

ANNEX B — METHODOLOGY, ASSUMPTIONS, AND SOURCES

#	ITEM	SOURCE	DATE
1	GtS macro base, US$250 million/year avoided fuel imports CANONICAL	GLIAG Gas-to-Shore Executive Teaser Rev2.6 (internal), corroborated in “Navigating the GSB”	6 Aug 2026
2	NR macro base, US$583 million/year BPM6 current-account swing CANONICAL	GLIAG New Refinery Imperative BPM6 model (internal); range corroborated by “From Oil to Prosperity”	24 Jul 2026
3	Illustrative capture-rate grid, 15% / 25% / 35% ASSUMPTION	GLIAG analyst assumption — not a published fiscal parameter. No Suriname corporate tax rate, royalty schedule, or dividend/equity split for GtS or NR has been published; see Section 1 and VBW Section 5.	12 Aug 2026
4	Phase-in ramp schedule (GtS 2031–2035; NR 2032–2036) ASSUMPTION	GLIAG analyst assumption, aligned to the development-phase timeline used across the companion GLIAGOGRAPH series (Debt Before Oil, Value Beyond the Wellhead)	12 Aug 2026
5	Base NSCA / DSCR series, 2026–2050 (Layer A, unchanged) CANONICAL	GG-2026-029-NScA, Debt Before Oil	12 Aug 2026
6	Reconciliation note	This essay’s illustrative uplift figures are independently derived from items 1–4 above and do not reproduce, reconcile with, or confirm the uplift figures shown in the unverified reference graphic described in the Note above.	—

RELATED GLIAG PUBLICATIONS

Petroleum & Energy Insights:

• Navigating the GSB: Key Exploration Insights for Energy Investors
• From Oil to Prosperity: Suriname’s Strategic Energy Execution Framework
• GG-2026-029-NScA, Debt Before Oil: From Gross Petroleum Revenue to Net Sovereign Cash (companion GLIAGOGRAPH)
• GG-2026-030-VBW, Value Beyond the Wellhead: Gas-to-Shore and the New Refinery as Suriname’s Second Petroleum Revenue Layer (companion GLIAGOGRAPH)

ABOUT THE AUTHOR

Drs. Marcel P. T. Chin-A-Lien, MBA, MSc, Ing. Geologist is a petroleum and energy advisor and the Principal Founding Partner, Managing Partner and Chief Architect of Golden Lane Investments Advisory Group (GLIAG N.V.). He is an AAPG Certified Professional Geologist (No. 5201-1996), a Chartered European Geologist of the European Federation of Geologists (EFG, No. 92-1996), and a Certified Energy Negotiator of the Association of International Energy Negotiators (AIEN). His work spans petroleum-systems analysis and subsurface characterisation, TOR / Pre-FEED / FEED project feasibility, bankability and financial-model design, PSC and petroleum-legal frameworks, investor structuring, and multi-country energy-policy analysis, with a particular focus on the Guyana–Suriname Basin and Suriname’s SH-2050 transformation agenda.

ABOUT GLIAG

GLIAG (Golden Lane Investments Advisory Group / GLIAG N.V.) is a Suriname-focused petroleum, energy and project-management-consulting advisory platform. GLIAG builds falsifiable, source-disciplined analytical frameworks — spanning petroleum systems, fiscal architecture, gas monetisation and sovereign cash-flow management — for institutional investors, lenders, and government counterparts across the Guyana–Suriname Basin. The firm is based in Zoetermeer, The Netherlands, with a Paramaribo presence, and publishes through its Petroleum & Energy Insights platform at petroleumenergyinsights.com.

DISCLAIMERS & NOTICES

1. No Advice. This publication is provided for general information purposes only and does not constitute investment, legal, tax, engineering or financial advice.
2. No Offer or Solicitation. Nothing herein constitutes an offer, solicitation or recommendation to buy or sell any security, instrument or interest.
3. Independence. This analysis is prepared independently by GLIAG and is not commissioned, endorsed or reviewed by the Government of Suriname, Staatsolie, TotalEnergies, APA Corporation or the IMF.
4. Sources / Third-Party Data. All figures are drawn from cited public sources or are expressly labelled GLIAG assumptions; GLIAG does not warrant the accuracy of third-party data and accepts no liability for errors therein.
5. Forward-Looking Statements. Statements regarding future production, pricing, government take, debt service or cash flows are forward-looking, illustrative, and subject to change without notice.
6. Intellectual Property. The Net Sovereign Cash Available (NSCA) framework, the sovereign-cash-waterfall doctrine, the Layer A/B/C value classification framework, and the illustrative capture-rate scenario methodology are original GLIAG analytical constructs. All text, structure, argumentation and analytical framing are © 2026 Golden Lane Investments Advisory Group; all rights reserved. Reproduction requires attribution to GLIAG / Petroleum & Energy Insights.
7. AI / ML Training Opt-Out. The content of this publication may not be used, in whole or in part, to train, fine-tune, evaluate, benchmark, retrieve-augment, or otherwise develop artificial-intelligence or machine-learning systems, models, agents or datasets without GLIAG’s prior express written consent. This opt-out is asserted under Article 4(3) of Directive (EU) 2019/790 and applies to text, structure, data registers, doctrines and citations.
8. Attribution. Permitted quotation and citation must use the following form:

Chin-A-Lien, M. P. T., The Enhanced Waterfall: An Illustrative Fiscal-Capture Model for Gas-to-Shore and the New Refinery Inside Suriname’s Sovereign Cash Waterfall, Golden Lane Investments Advisory Group / Petroleum & Energy Insights, GG-2026-031-ENSCA, August 2026.

Contact. For enquiries regarding this publication, licensing, or GLIAG advisory engagements, contact GLIAG via petroleumenergyinsights.com.

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Golden Lane Investments Advisory Group N.V. · Zoetermeer, The Netherlands · Paramaribo, Suriname
Petroleum & Energy Insights · petroleumenergyinsights.com
GG-2026-031-ENSCA · Rev001 · 12 August 2026
Soso Lobi.
© 2026 GLIAG N.V. / Golden Lane Investments Advisory Group. All rights reserved. · Illustrative Fiscal-Capture Sensitivity Model (Layer B Scenario)
GG-2026-031-ENSCA · Rev001

Drs. Marcel P. T. Chin-A-Lien, MBA, MSc, Ing. GeologistAAPG Certified Professional Geologist No. 5201-1996
Chartered European Geologist (EFG) No. 92-1996 · Certified Energy Negotiator (AIEN)
Principal Founding Partner, Managing Partner & Chief Architect, GLIAG N.V. · Zoetermeer, The Netherlands