Live Feasibility: Tracking Property Projects vs the Model
A virtual CFO on turning a static development feasibility into a live tracker: cost to complete, drawdowns, margin drift, and catching problems months…
A development feasibility is usually the most carefully built model in a property business and the most quickly abandoned. It is prepared to win the site and secure the finance, and then, at exchange, it goes in a drawer while the project runs on site invoices and gut feel. The feasibility that justified the whole project stops being consulted precisely when it matters most. Turning that static model into a live tracker is how a developer catches margin erosion months before completion instead of discovering it at the end. This is a virtual CFO’s method for doing it.
Published: July 2026
The feasibility does its headline job at the front: it proves the project stacks up, sizes the profit, and supports the finance application. Once the site is secured and construction starts, though, the project generates a stream of real information, actual costs, revised timelines, changing sales evidence, that the static feasibility never absorbs. The model was a snapshot of assumptions at a moment; the project is a moving reality, and the two drift apart from day one on site.
The consequence is that most developers do not know their true margin until near completion, when the costs are largely locked and the sales are largely known. By then the levers to protect margin, value-managing the build, adjusting the sales strategy, renegotiating a trade package, have mostly passed. A live feasibility keeps the model current against the project’s actual information, so margin problems surface while there is still time to act on them. This complements the live construction work-in-progress cornerstone and is a natural 90-Day Number focus for a developer.
A live feasibility tracker does not need to reproduce the whole feasibility monthly. It tracks four lines, each comparing the current reality to the underwritten assumption.
The first is cost to complete against budget remaining: not what has been spent, but the honest estimate of what it will still cost to finish, set against the budget left. This is the line that catches cost overruns early, because a cost-to-complete rising faster than the budget remaining is the first sign the build is running over. The second is the drawdown schedule against the facility: how the debt is being drawn relative to the facility’s schedule and limit, which flags funding pressure before it becomes a crisis. The third is revenue assumptions against current evidence: whether the sale prices the feasibility assumed still hold given actual sales, comparable evidence, and market movement since exchange. The fourth is margin now against margin underwritten: the project’s current projected margin, recomputed from the three lines above, set against the margin the feasibility promised. That fourth line is the headline; the first three explain it.
The power of the tracker is that it makes margin drift visible monthly rather than at completion. Every project’s margin moves as costs firm up and sales evidence accumulates, and small movements compound. A cost-to-complete creeping up here, a sale a little below assumption there, a delay pushing holding costs out, each shaves the margin, and unmonitored they can quietly erode a healthy underwritten margin to a thin actual one by the end.
Tracked monthly, that drift is caught while it is small and while levers remain. A developer who sees the margin slipping at month four can value-manage the remaining build, revisit the sales approach, or renegotiate an upcoming package. A developer who discovers the same slip at completion can do nothing but book the lower result. The difference between those two developers is not skill on site; it is whether the feasibility was kept live. The margin-drift line is the single most valuable number a developer can watch, because it converts a completion-day surprise into a series of manageable monthly adjustments.
Take a $9M project underwritten at a healthy development margin. By month seven, the live tracker shows three things moving. Cost to complete has risen: a trade package came in above budget and a variation added cost, together lifting the projected total build cost by a couple of per cent. Sales evidence has softened slightly against the feasibility’s assumed prices on the remaining unsold stock. And a short delay has added holding cost on the facility. Individually each is minor; together they have moved the projected margin down by about three percentage points from the underwritten figure.
Caught at month seven, that three-point drift is actionable: the developer can value-manage the remaining fit-out, adjust the pricing and release strategy on the unsold stock, and tighten the program to claw back holding cost, recovering much of the drift before completion. Had the same three points only emerged at completion, the result would simply be a lower final margin with nothing to be done. The tracker did not prevent the cost and sales movements; it made them visible in time to respond, which is the whole point of keeping the feasibility live.
A live feasibility also changes the relationship with the project’s financier for the better. Development financiers want confidence that the project is on track and that problems are being managed, and a developer who can show a monthly tracker, cost to complete, drawdowns against facility, current sales evidence, and margin against underwrite, presents as in control in a way that quarterly surprises never allow. This is reporting to keep the financier informed and confident; it is not development finance broking, and the mechanics of any particular facility stay generic here and specific with the lender. A developer who reports proactively from a live tracker tends to find facility conversations easier, because the financier is never blindsided.
Why does a feasibility go stale?
Because it is built to win the site and secure finance, then set aside at exchange while the project runs on invoices and instinct. The model was a snapshot of assumptions; the project is a moving reality that generates actual costs, revised timelines, and changing sales evidence the static feasibility never absorbs. The two drift apart from day one on site.
What does a live feasibility tracker monitor?
Four lines, each comparing reality to the underwrite: cost to complete against budget remaining (catches overruns early), drawdowns against the facility (flags funding pressure), revenue assumptions against current sales evidence (tests whether assumed prices hold), and margin now against margin underwritten (the headline, recomputed from the other three). Together they show whether the project is tracking to its promised margin.
What is margin drift?
The gradual movement of a project’s projected margin as costs firm up and sales evidence accumulates. Small movements, a trade package over budget, a sale below assumption, a delay adding holding cost, compound over a project and can erode a healthy underwritten margin to a thin actual one. Tracked monthly, drift is caught while small and while levers remain; discovered at completion, it can only be booked.
How early can problems be caught?
As early as they emerge, if the tracker is run monthly. A margin slip visible at month four or seven can be addressed by value-managing the remaining build, adjusting the sales strategy, or renegotiating an upcoming package. The same slip discovered at completion is simply a lower result. Monthly tracking converts a completion-day surprise into manageable adjustments along the way.
Does this help with my financier?
Yes. A developer who reports a monthly tracker, cost to complete, drawdowns, sales evidence, margin against underwrite, presents as in control, and financiers value that over quarterly surprises. It is reporting to keep the lender informed and confident. It is not development finance broking, and the specifics of any facility stay with your lender; the tracker is about visibility, not arranging debt.
Do I need to rebuild the whole feasibility every month?
No. The tracker monitors four lines against the underwrite, not a full monthly rebuild. The heavy work is the initial feasibility and setting up the tracker; after that, the monthly update refreshes cost to complete, drawdowns, sales evidence, and the recomputed margin. It is a light monthly discipline on a model already built, not a recurring major exercise.
Can a virtual CFO set up my live feasibility?
Yes. Converting a static feasibility into a live four-line tracker, with the margin-drift line as the headline and a monthly cadence, is a defined deliverable and a natural 90-Day Number for a developer. The output is a tracker you own that surfaces margin problems while there is still time to act, and that makes financier reporting simple.
Sydney Virtual CFO is a Sydney-based virtual CFO service for founders running $2M to $15M businesses across SaaS, ecommerce, professional services, construction, and other low-volume, high-value industries. We deliver fixed-scope CFO engagements with a named deliverable on day 90: a 13-week cashflow forecast, a fundraise-ready financial model, a unit economics build, or a board reporting pack you can run on your own.
Our front-door product, the 90-Day Number, is fixed scope at $17,850 plus GST. We are one of the few project-based virtual CFOs in Australia, in a market built almost entirely on monthly retainers. No retainers without a deliverable. No 80-page reports. No theatre.
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This content is general information only, written for Australian founders running businesses in the $2M to $15M revenue range. It does not constitute tax, financial product, investment, or legal advice and should not be relied on as such. The work referenced is led by a Chartered Accountant (CA ANZ), but Sydney Virtual CFO is not a licensed tax agent, not a licensed financial adviser, and not authorised to provide personal financial advice. Tax obligations, accounting treatments, fundraise terms, and statutory requirements depend on your individual circumstances. For advice specific to your business, contact the team directly or consult a registered tax agent, licensed financial adviser, or qualified lawyer. Information was current at the time of publication and may change without notice. We review and update guides periodically.
