Construction Budgets and Contingencies

A contractor estimate may describe much of the physical work, but a financeable budget must explain the entire project from current state to completion. It should reconcile contracted costs, uncontracted allowances, professional/municipal costs, financing carry and reserves.

The budget becomes the baseline against which lender advances, change orders, contingency usage and cost-to-complete are measured.

Hard costs are direct physical construction. Soft costs can include design, architecture, engineering, planning, permits, development charges, legal, survey, environmental, appraisal, marketing/leasing and project management. Financing costs can include lender/brokerage fees where applicable, interest, draw inspections, lender consultants and extension costs.

Classifying costs correctly matters because a lender may finance or recognize categories differently.

A contingency is intended to absorb costs that were not fully knowable when the original budget was prepared. Soil conditions, concealed damage, price changes, design coordination and code/municipal requirements are examples.

There is no universal lender-required contingency percentage. Project type, contract structure, design completeness, renovation uncertainty and sponsor strength all matter. An illustrative 10% contingency may be prudent for one project and inadequate or excessive for another.

Contingency pays unexpected project cost. Interest reserve pays financing carry where structured that way. Statutory holdback relates to Ontario construction-payment/lien law. Working capital bridges timing between invoices and draws.

A budget should show each separately. A project that reports “$100,000 reserve” without explaining which risk it covers may actually have no protection against the risk that materializes.

A line item supported by a signed fixed-price contract has a different uncertainty profile from an allowance based on an early estimate. Borrowers should track original budget, committed amount, paid to date, forecast final cost, and remaining cost.

The forecast final cost—not the original spreadsheet—should drive the current cost-to-complete analysis.

A simplified formula is: Cost to complete = forecast final project cost − verified eligible cost already incurred, adjusted for remaining commitments and known changes.

If a $1.2 million project has incurred $600,000 but new information pushes expected total cost to $1.32 million, the remaining cost is not the original $600,000. It is approximately $720,000 before further contingency decisions.

If an original $100,000 contingency has already absorbed $75,000 of unforeseen work at the halfway point, the project has only $25,000 left for the remaining uncertainty. Describing the project as having “a 10% contingency” is now misleading.

A useful dashboard shows contingency used, committed, remaining and remaining as a percentage of unfinished cost.

Construction interest is path-dependent. Two projects with the same final loan and same completion date can incur different interest if their draw timing differs. A delay or earlier-than-expected draw can consume reserve without changing hard cost.

A financing model should therefore include a monthly or stage-based draw curve, expected interest and a delay scenario rather than one flat annual-interest estimate.

A delayed project can face more interest, supervision, insurance and temporary-service cost while also exposing uncommitted materials/labour to price changes. The financial effect is therefore not simply “two extra months of interest.”

Where large procurement packages are not locked, the contingency should be tested against realistic repricing rather than assuming every uncommitted budget item remains fixed.

Before approving scope change, identify the direct cost, schedule effect, financing/carry effect, and expected change in completed value or income. A change can be aesthetically attractive while weakening the lender’s completion cushion.

The fifth question is who funds it. A lender may require borrower cash for overruns or unapproved upgrades even when the overall property remains well collateralized.

A borrower can model at least three independent cases: cost overrun, schedule delay and value shortfall. For a rental/commercial project add lease-up or NOI underperformance. The goal is to identify the first constraint that fails—completion capital, lender LTC/LTV, liquidity, maturity or takeout.

This tells the borrower which reserve actually needs strengthening.

If one trade comes in under budget, that saving may be needed to cover another package that is still uncontracted. Treating every early saving as free cash can erode the completion reserve before the highest-risk work is finished.

Lenders may also decline to recognize speculative savings in cost-to-complete until they are supported by executed contracts or completed work.

The strongest construction budgets are dynamic: they update actual spend, commitments, contingency and remaining sources after each draw. They also identify costs that must be paid even if construction pauses.

A project becomes vulnerable when the only unfunded source is future appreciation or a hoped-for new lender.