Reference guide to the cash pipe: who finances whom, the three numbers that measure it, the money that is not all Grace’s, and the collections sequence that protects the client relationship.
Finance Field Guide · companion to the Module 3 Overview & Quick ReferenceModule Home › Finance Field Guide
Optional depth. Read this for the cash, float, and collections mechanics behind the module. It is not required for the weekly 90 minutes.
Module 3 covers the pipeline, backlog to WIP to receivables to cash, and the three moves that push money through it. This guide answers one question: “Whose bank is Grace, and how fast does earned work become cash?” Every day in the pipe is a business decision, made deliberately or not.
Who is financing whom
Payroll goes out every two weeks. Cash arrives months after the work. In between, the firm is the client’s bank, interest-free.
Grace’s $1.4M fee across a twelve-month design schedule earns roughly $115k in a typical month. The team works through the 31st. Pre-bills are reviewed by the 25th, the invoice goes out by the 7th, and terms are net-30. Even a client who pays on time pays about six weeks after the middle of the work. A client who pays “normally” stretches that past two months.
That $230 to 350k is the float, money Grace has earned, has paid payroll against, and has not yet received, on one project. Across every active project in the studio, the float reaches the size of a small office’s annual payroll, permanently loaned out. The firm covers it with cash reserves or a line of credit, and a line of credit charges interest. The consequence is direct: the firm pays interest so the client can hold Grace’s money longer.
BST column ⑦, in detail
Module 2 covers scorecard columns ① to ⑥. This module covers column ⑦, the day counts. Three numbers measure the pipe.
| Metric | What it measures | Who owns it |
|---|---|---|
| Unbilled Days | How long earned work sits as WIP before an invoice exists. The PM Speed Zone, with a number on it. | The project manager, almost entirely. On the rhythm it runs in the single digits to ~15. Drifting, it reaches 45 or more, and the firm has financed the work. |
| Receivable Days (DSO) | Invoice date to cash in the bank. DSO = receivables ÷ average daily billings. | The project manager and the client together. Follow-up sets the pace. |
| Days to cash | Unbilled + receivable days: the full length of the pipe, work to money. | The single best measure of how well this module is being practiced on a project. |
For scale: design-firm receivables industry-wide average around 70 days Illustrative · confirm in BST. A well-run project beats the industry average. Most of what makes cash slow is the invoice itself: sent late, sent wrong, or sent and never followed up.
| Age | What it usually means | GRACE MOVE |
|---|---|---|
| 0 to 30 | Normal. The invoice is moving through approval. | Accounting confirms receipt and approval within the first week. One short message. |
| 31 to 60 | Stuck, not refused. Most “late” invoices are sitting in someone’s approval queue or missing a PO number. | Accounting monitors and asks specifically: “Is anything holding the March invoice?” Fix the cause rather than re-sending. |
| 61 to 90 | A real problem is forming: an unvoiced dispute, or a client cash issue. | PM involvement typically requested. Call rather than email. Name the number and ask what is in the way. PIC informed. |
| 90+ | Collection probability is falling every week. This is now a firm-level exposure. | Leadership engaged. The contract’s remedies, including pausing work, are considered as a deliberate decision. |
The Speed Zone is clean. Billing is on the rhythm. The delay is downstream: 78 receivable days means invoices go out and receive no follow-up. The move is Collect it: confirm approval on the newest invoice, and make the call on anything past 60.
The money that is not all Grace’s
Half the Oakhaven fee was never Grace’s. The billing rhythm is the structural engineer’s payroll.
Oakhaven’s total design fee is $2.8M. Consultants carry $1.4M of it. That money moves through Grace: the consultant bills Grace, Grace bills the client for the full month’s work, and, where the contracts say pay-when-paid, the consultant is paid when the client’s cash arrives. Follow the chain: the invoice sits two weeks in WIP → the client pays six weeks later → the structural engineer waits two months for completed work. The billing habit sets the consultant’s cash flow.
Relationship work, not dunning
The collections call is a service, the same reframe as the fee conversation. Invoices stall in approval workflows rather than in bad faith. Surfacing a problem in week two helps the client.
Most PMs avoid the money follow-up for the same reason they absorb scope changes: it feels like an imposition. A client whose AP process stalled an invoice wants to know before it becomes a quarter-old balance. The craft is a rhythm, an early touch, and a fixed escalation ladder:
Each line gives the client clarity and a clean next step. Never go silent on money. Silence converts a process delay into an awkwardness, and an awkwardness into a write-off. A clean money relationship is part of the client’s experience of Grace, and value multiplies performance by experience.
A preview of the plan
Module 2 covers the planned earned-value curve, how the fee will be earned across the schedule. Shift that curve twice to get the firm’s cash forecast: earned work becomes a billing curve on the invoice rhythm, and billings become a cash curve offset by days-to-cash. That is how the firm predicts in June whether November makes payroll.
Two consequences follow for the project manager: percent-complete honesty feeds the firm’s cash forecast, and days-to-cash sets how far the firm reaches into its reserves. The Planning Studio (Modules 5 to 6) builds the full planning machinery: baseline curve, labor demand, and the plan behind the invoice schedule. The pipe in this module is the last stage of a plan that started before the first hour was worked.
The Owner’s other number
This module follows the Owner’s money, backlog to cash. One more Owner number sits on the PM desk, and it dwarfs the fee. Grace builds a fee, $1.4M on Oakhaven. The Owner asks most often about their building, the ~$40M required to construct it.
Hold two numbers separately. The fee is what Grace earns. The Opinion of Probable Construction Cost (OPCC) is what the building costs. Never blur them. A construction cost number treated casually becomes a liability.
An early schematic number is given verbally, the Owner records it, and nobody revisits it. Design matures, scope firms up, and the estimate climbs. At the Construction Documents phase review the Owner learns the project is 20% over the figure carried for eight months. On a ~$40M building, that is an ~$8M surprise. At that point it is a trust problem rather than a design problem.
Cost accuracy is a function of how much has been drawn. At Schematic Design the estimate prices intent. By Construction Documents it prices a defined building. Carry the estimate as a band that tightens at each phase review, the cone of uncertainty. State the band and its phase out loud.
| Phase | What is being priced | Typical accuracy band* | Design contingency* |
|---|---|---|---|
| Schematic Design (SD) | Concept, area, systems intent | −10% to +20% | ~15% |
| Design Development (DD) | Defined systems, major materials | −5% to +15% | ~10% |
| Construction Documents (CD) | A fully specified building | −5% to +10% | ~5% |
| Bid / GMP | The market’s actual answer | Market price | → rolls into Owner’s construction contingency |
*Illustrative bands following AACE estimate-class logic. The band tightens as the design resolves. Refer to Grace Legal / General Counsel and the Finance and Accounting Team for project-specific and client-specific guidance for specific scenarios, and to review specific internal policies.
Grace is a design professional, not a contractor and not a cost-estimating firm. Every construction-cost number that leaves the office carries the standard-of-care language in writing.
The disclaimer is the practical form of Protect Integrity: name what the number is and what it is not, so nobody mistakes an opinion for a commitment.
The estimate is a control to run, not a document to produce and file.
Behavior, not knowledge
On your throughline project, this week: