Time Tracking for Architects and Interior Designers: Project Phases That Eat Your Margin

The standard fee allocation for architectural projects is well-established: roughly 15% for schematic design, 20% for design development, 40% for construction documents, 5% for bidding, and 20% for construction administration.

These percentages look clean on a proposal. In practice, the hours rarely cooperate. And the phases where projects go over budget are remarkably consistent.

Where the Hours Actually Go

Architectural and interior design projects follow a phased structure, and each phase carries distinct risks for time overruns. Understanding where the bleeding typically happens is the first step toward preventing it.

Schematic Design (Target: 15% of total hours)

Schematic design is where you establish the big moves — spatial relationships, massing, site strategy, preliminary floor plans. This phase is relatively contained because the scope is broad: you're exploring concepts, not resolving details.

Common overrun triggers:

• Clients who can't commit to a direction, causing multiple concept restarts
• Scope that wasn't clearly defined in the contract, leading to "just one more option" requests
• Underestimating the time needed for initial site analysis or code research

For most firms, schematic design stays close to budget. The trouble starts in the next phase.

Design Development (Target: 20% of total hours)

This is the phase that eats margins. Design development takes the approved schematic concept and refines it — specifying materials, detailing systems (HVAC, electrical, plumbing), resolving structural questions, and coordinating with consultants.

Why this phase consistently overruns:

• The detail explosion. Every conceptual decision from schematic design spawns dozens of detailed decisions. A simple wall becomes a question of material, finish, thickness, acoustic rating, fire rating, and connection details. The work multiplies faster than most proposals account for.
• Client revision cycles. Design development is when clients first see specifics — actual materials, real fixtures, detailed plans. This is where they change their minds. And unlike schematic changes (which are conceptual), DD changes cascade through engineering coordination, consultant work, and specification updates.
• Consultant coordination. Structural, mechanical, electrical, and plumbing engineers are all producing their work in parallel. Resolving conflicts between systems — the duct that doesn't fit in the ceiling cavity, the column that lands in the wrong place — takes time that's hard to predict.
• The "we're almost done" trap. Design development feels like it should be a defined step: take the concept and detail it. But the boundary between DD and construction documents is fuzzy, and teams often start resolving CD-level detail during DD without realizing they're working ahead of their fee allocation.

Construction Documents (Target: 40% of total hours)

Construction documents represent the largest share of the fee for good reason — this is the most labor-intensive phase. You're producing the drawings and specifications that contractors will build from.

Common overrun triggers:

• Details that weren't resolved in DD and need design decisions during documentation
• Code compliance issues discovered late that require design changes
• Owner-requested changes after DD approval (which should be change orders, but often aren't)
• Coordination gaps with consultants that surface during detailed documentation

The irony: when DD overruns, CD often overruns too, because the unresolved decisions carry forward.

Construction Administration (Target: 20% of total hours)

Site visits, RFIs (requests for information), submittals review, change order evaluation, and punch lists. This phase is often underestimated by firms that are optimistic about how smoothly construction will go.

What gets missed:

• Travel time to and from the site, especially for projects outside your immediate area
• The volume of RFIs on complex projects — each one requiring research, documentation, and a formal response
• Punch list walks that stretch across multiple visits
• Owner-initiated changes during construction that require design revisions

The Interior Design Difference

Interior designers face all of the above plus a few unique time sinks:

• Procurement and sourcing. Researching products, requesting samples, obtaining quotes, tracking lead times, managing orders. On a residential project, specifying and procuring furnishings, fixtures, and finishes can consume as many hours as the design itself.
• Vendor coordination. Custom fabricators, upholsterers, window treatment companies, art consultants — each relationship requires communication, approvals, and quality checks.
• Installation management. Receiving, inspecting, and staging deliveries. Coordinating installation schedules across multiple trades. Being on-site to direct placement and resolve issues.
• The "shopping" misconception. Clients sometimes view sourcing as casual browsing. In reality, specifying the right dining table might involve researching forty options, sampling six, presenting three, and managing the order for one — across several weeks.

How to Track by Phase

Effective time tracking for design projects needs to capture two dimensions: which project and which phase. This is what tells you whether your fee allocation actually matches reality.

Set Up Phase-Based Categories

At minimum, track these separately:

1. Pre-design / programming
2. Schematic design
3. Design development
4. Construction documents
5. Bidding and negotiation
6. Construction administration
7. Procurement (interior design)
8. Administrative / non-project

Track at the Task Level Within Phases

Within each phase, distinguish between:

• Design time: The actual creative and technical work
• Client communication: Meetings, calls, emails, presentations
• Consultant coordination: Meetings and communication with engineers, specialists
• Revisions: Work that results from client-requested changes (track this separately — it's where your data gets most valuable)

Log Daily, Review Weekly

Architectural work happens in long, focused stretches that are easy to lose track of. A quick end-of-day log — even noting just the project, phase, and hours — beats trying to reconstruct a week from memory.

Weekly, compare logged hours against the fee budget for each active project. If design development is at 80% of its budget and only 60% complete, that's the signal to have a conversation — with your team, your client, or both.

Spotting Overruns Before They Kill Your Margin

The firms that maintain healthy margins aren't the ones that never overrun — they're the ones that catch overruns early. Time tracking by phase makes this possible:

The Phase Budget Ratio

For every active project, maintain a simple metric: hours spent vs. hours budgeted for the current phase. When this ratio exceeds 70% and the work is less than 70% complete, you have an emerging overrun.

Revision Tracking

Revisions are the single most common source of unpaid work in design. Track revision hours separately and you'll have the data to support change order requests — or to renegotiate scope before it's too late.

The Post-Project Audit

After project completion, compare actual hours by phase against the original proposal. Do this for ten projects and clear patterns will emerge: maybe your DD estimates are consistently 30% low, or your CA time is double what you budget.

This historical data is what transforms future proposals from guesswork into informed estimates.

What Good Tracking Data Gets You

• Accurate proposals. When you know that your design development phase consistently runs 25% over budget, you can adjust your fee allocation before signing the contract — not after.
• Earlier scope conversations. Hard data makes the "this is a change order" conversation easier. "We've used 90% of our DD hours and have three rounds of revisions outstanding" is a factual statement, not a complaint.
• Better project selection. When you can see which project types are profitable and which aren't — and specifically which phases on which project types cause problems — you can pursue the right work and price the risky work appropriately.
• Team capacity planning. Knowing your real hours per phase lets you forecast workload when multiple projects are in different phases simultaneously.

The gap between estimated and actual hours is where profit goes to die in design firms. Closing that gap starts with knowing how wide it is.