Milestones: Settle Your Deal in Installments

High-value trade rarely settles in one shot. A hardware shipment moves through production, inspection, freight, and customs before the buyer has usable goods. A build pays against stages. A services contract releases against accepted deliverables. Settlement tools that only do all-or-nothing leave one side carrying more risk than the commercial timeline requires.

Trade finance already knows this. Letters of credit under UCP 600 can allow partial drawings and installment schedules unless the credit forbids them. FIDIC construction forms pay against interim statements and progress certificates. Agencies and software shops bill on milestones. Bitcoin escrow should support the same pattern without parking funds in a bank trust account or a platform balance sheet.

That is what Milestones on Tetrapolar do. A milestone deal is a group of standard escrow deals under one commercial umbrella. Each child deal is one settlement step: its own amount, independently fundable and releasable, under the same non-custodial multisig model as every other Tetrapolar contract.

What a Milestone Deal Is

A standard Tetrapolar deal is the atomic settlement unit. Buyer and seller agree terms. The buyer funds a multisignature escrow wallet. Funds move when both parties sign, or later along the documented backup path when a court-directed release is executed. Tetrapolar coordinates the deal. It never holds unilateral control of the bitcoin.

A milestone deal does not invent a new wallet type. It groups several of those standard deals. Child deals keep their own payment amounts. The group shares currency and the same release logic the parties already use on a single deal. In practice you can structure up to twenty steps in one arrangement.

Because each milestone is a full standalone escrow, completing step three does not unlock step five. A dispute on one installment does not open every other vault. You can see per step which tranche is funded, which is released, and which is still pending.

Why Standard Deals as Primitives

We could have built one complex wallet whose script tried to encode every phase, dependency, and exception inside a single address. That looks tidy on a whiteboard. In production it widens the attack surface, complicates recovery tooling, and makes the deal harder for non-developers to reason about.

So we composed instead of inventing. Standard deals are the primitives. Multi-step settlement is a group of them. If you can fund, monitor, and release one escrow, you can do a sequence. Wallet backups, collaborative signing, and offline recovery stay the tools you already use.

For practitioners that means three things that matter on real deals.

You decide when each installment funds and when it releases. Capital does not have to sit locked for the whole project if the contract only calls for a deposit at production start and a balance on delivery.

Both sides can see which steps are funded and which are done. That cuts the ambiguity that turns a logistics delay into a full-relationship fight.

Failure stays local. A stuck or disputed milestone does not inherit the complexity of a bespoke multi-condition script. Each vault remains the familiar cooperative path with a timelocked backup path, the same structure documented in Tetrapolar’s escrow design.

How This Maps to Real Settlement Practice

Installment settlement is ordinary commercial practice that predates Bitcoin by decades. Under the ICC’s Uniform Customs and Practice for Documentary Credits (UCP 600), partial drawings and shipments are allowed unless the credit says otherwise, and credits can set installment schedules by period. Construction under FIDIC forms routinely pays on interim certificates rather than a single end-of-project wire. Professional services already bill against acceptance of defined deliverables.

Milestones put that pattern onto Bitcoin-native escrow. Each tranche sits in a multisig vault the parties control, settles on the Bitcoin mainchain, and does not depend on a custodian’s trust account or a correspondent bank’s cut-off window.

As of September 2026, Tetrapolar is Bitcoin-only. Milestone deals settle in BTC on the Bitcoin mainchain, including USD-denominated contracts that settle in bitcoin for a fixed fiat sum with a funding buffer. The milestone structure is about how you sequence escrow, independent of the unit of account inside each step.

Example 1: Hardware Supply, China to Africa

Take a mid-size importer in East Africa buying industrial or IT hardware from a manufacturer or trading house in China. On paper the contract is clear: deposit, production, inspection, ocean freight, arrival and customs, final acceptance. The hard part is when money should move relative to physical progress.

One workable milestone map:

1. Order confirmation / production kickoff. Modest deposit released when the purchase order is acknowledged and a production schedule is shared.
2. Ex-works readiness / pre-shipment inspection. Second tranche released when inspection or packing evidence agreed in the contract is provided.
3. On-board / bill of lading. Larger tranche released when shipping documents confirm the cargo is on the vessel.
4. Arrival and customs clearance. Tranche released when the container is available at destination, before the buyer takes full commercial risk on last-mile delivery.
5. Final acceptance. Balance released after the buyer’s receiving check against the agreed packing list and condition terms.

Without milestones, the importer wires most of the value before the container leaves, or the exporter ships against a promise. With milestones, each standard escrow covers only the amount tied to that commercial event. The exporter gets paid as risk transfers. The importer keeps unpaid capital locked to remaining steps instead of sitting as an unsecured advance.

Any China–Africa hardware lane with long transit times and bank friction benefits from the same structure: staged release aligned to documents and possession.

Example 2: Construction Paid Against Agreed Stages

A house or small commercial build is almost never paid as one transfer. Owners and contractors already negotiate stages: mobilization, foundation, structure, envelope, mechanical and electrical, finishes, handover. FIDIC-style contracts formalize that with interim payment certificates. Value certified for work done is then paid, often with retention held to practical completion.

Map that onto Tetrapolar milestones. Each construction stage becomes its own standard escrow:

1. Mobilization and site setup
2. Foundation and groundworks
3. Structure / shell
4. Envelope and weatherproofing
5. MEP rough-in
6. Finishes and commissioning
7. Practical completion / handover (including any retention release as a final milestone)

The owner funds the next stage when the previous one is accepted under the written criteria. The contractor is not financing the entire build on goodwill. The owner is not prepaying the roof before the foundation exists. If stage four stalls, stages five through seven stay unfunded or unreleased, visible as separate deal states rather than one opaque balance.

Escrow does not replace a surveyor or engineer. It enforces the settlement consequence of their acceptance. The escrow keys only settle whether this installment can move, and under whose keys.

Example 3: Services and Soft Deliverables

Software builds, agency campaigns, and consulting engagements hit the same failure modes: a large retainer up front with vague scope, or unpaid invoices after the work is already done.

A clean milestone structure for a fixed-scope project:

1. Discovery and statement of work. Small kickoff payment on signed SOW and kickoff materials.
2. Design or architecture baseline. Payment on acceptance of the agreed design package.
3. Working deliverable / MVP. Payment when the build meets the acceptance tests written into the SOW.
4. User acceptance / go-live. Payment on sign-off after UAT.
5. Warranty / hypercare period. Final tranche released at the end of an agreed support window, or refunded if the warranty terms are not met.

Each step is a standard Tetrapolar deal. The client sees which installments are funded. The provider sees which releases are still pending. Scope changes become commercial amendments (new or adjusted milestones) rather than informal chat promises layered on a single prepaid pot.

That matches the same direction Tetrapolar has already described for service providers coordinating milestone-based work: settlement that tracks deliverables.

What Milestones Do Not Change

Milestones do not turn Tetrapolar into an arbitrator of quality. They do not inspect containers, certify concrete pours, or run software test suites. Those judgments stay with the parties and, if needed, with whatever court or expert process their private contract names.

What changes is the settlement topology. Instead of one vault for the whole commercial relationship, you get a sequence of vaults whose funding and release map to the work. Each vault keeps the non-custodial properties already documented on the platform: cooperative release by buyer and seller; a timelocked backup path where Tetrapolar’s key can participate only with another party; no unilateral platform spend; wallet backup and recovery paths that survive if the coordinator is offline.

Fees and deal limits remain those of the underlying standard deals. Milestones only structure how settlement is sequenced. Custody stays the same as on a standard deal.

Closing

Letters of credit allow partial drawings. Construction pays on certificates. Agencies bill on deliverables. What was missing was a Bitcoin-native way to express that structure without recreating custodial middlemen.

Milestones do it by composition: a group of standard escrow deals, each independently funded and released, grouped as one multi-step settlement contract. You keep control and visibility at every step. The platform stays a coordinator. Bitcoin enforces finality.

If your next deal has more than one commercial moment between “signed” and “done,” settle it the way the work actually happens, one milestone at a time.

Questions? Reach us at info@tetrapolar.com.

Sources

1. Tetrapolar, “Introducing Milestones: Escrow Settlement in Installments” (product announcement: group of standard escrow contracts, up to 20, independent release): https://blog.tetrapolar.com/introducing-milestones-escrow-settlement-in-installments/
2. Tetrapolar, product overview (deal creation with milestones; non-custodial multisig model): https://tetrapolar.com/
3. Tetrapolar, “Back to Basics: Tetrapolar Is Now Bitcoin-Only” (BTC-only settlement as of 10 Sep 2026): https://blog.tetrapolar.com/back-to-basics-tetrapolar-is-now-bitcoin-only/
4. Tetrapolar, “Tetrapolar: Building Bitcoin-Native Settlement for Global Trade” (service providers and milestone-based work as intended users; staged-release direction): https://blog.tetrapolar.com/tetrapolar-building-bitcoin-native-settlement-for-global-trade/
5. Tetrapolar, “Smarter Bitcoin Escrow: Flexible Multisig Built for Real-World Deals” (2-of-2 cooperative path and timelocked backup paths): https://blog.tetrapolar.com/smarter-bitcoin-escrow-flexible-multisig-built-for-real-world-deals/
6. ICC, Uniform Customs and Practice for Documentary Credits (UCP 600), Articles 31–32 (partial drawings/shipments; instalment drawings or shipments): https://library.iccwbo.org/content/tfb/RULES/tfb-ucp600-rules.htm
7. ICC Academy, UCP 600 overview (rules in force since 1 July 2007): https://academy.iccwbo.org/trade-finance/e-books/UCP-600/
8. FIDIC / International Construction Knowledge Hub, Clause 14 - Contract Price and Payment (interim statements, progress certificates, schedule of payments): https://internationalconstructionknowledgehub.com/fidic-2017-clause-14-contract-price-and-payment/
9. ISEC, “Payment Procedures under FIDIC Construction Contract” (interim payment certificates and progress-payment mechanics): https://www.isec-society.org/ISEC_PRESS/EURO_MED_SEC_04/pdf/LDR-05.pdf