The schedule of values approval is the single most consequential financial decision a GC makes before the first billing cycle. Once the SOV is approved, every pay application for the rest of the project is built on that foundation. A poorly structured SOV generates billing disputes, enables front-loading, and creates overbilling exposure that persists until final payment.

This checklist covers every aspect of SOV review, from initial submission through final approval.

Line Item Granularity Check

The number and size of line items determines how precisely you can track progress and detect billing anomalies. This is the first thing to evaluate on any SOV submission.

Minimum granularity standards:

No single line item exceeds 15% of the total contract value
Each major spec section maps to at least one line item
Location-based scopes (multi-floor, multi-building) are broken down by location
Equipment items valued over $25,000 are separate line items
Mobilization is a distinct line item (not embedded in other items)
General conditions are broken into monthly or phase-based items
Testing and commissioning are separate from installation

Red flags for insufficient granularity:

A $1.2M mechanical sub with 8 line items has an average item value of $150,000. A 10% overbilling error on one item costs $15,000 per billing period. That same sub with 35 line items averages $34,000 per item. The same 10% error costs $3,400. Granularity limits your per-item exposure.

Red flags for excessive granularity:

A $400K painting sub with 85 line items averages $4,700 per item. Reviewing 85 completion percentages takes 3+ hours per billing cycle and catches minimal additional overbilling versus a 20-item structure that takes 45 minutes to review.

Contract Value	Target Line Items	Max Single Item %	Min Review Items
Under $200K	10-18	20%	All items
$200K-$500K	15-30	15%	All items
$500K-$2M	25-45	12%	All items above $25K
$2M-$5M	40-65	10%	All items above $50K
Over $5M	50-80	8%	All items above $100K

Front-Loading Analysis

Front-loading detection at the SOV stage is cheaper than detection during billing. Catch it before the first draw, and you avoid the overbilling entirely.

SOV front-loading indicators:

Mobilization does not exceed 3-5% of contract value
Shop drawing and submittal line items are priced at reasonable rates (not inflated to pull profit forward)
Early-phase activities are not priced disproportionately higher than late-phase activities of similar complexity
General conditions are distributed evenly across the project duration (not concentrated in early months)
Material procurement line items are aligned with the actual delivery schedule (not priced for early billing)

How to test for front-loading: Calculate what the sub would bill through the first 3 months based on the SOV and the project schedule. If the projected billing exceeds 40% of the contract value while the scheduled work through month 3 represents only 25% of the scope, the SOV is front-loaded.

Comparison method: Request the sub's bid breakdown alongside the SOV. If the SOV line item values differ significantly from the bid prices for the same scope items, the sub restructured the pricing to favor early billing. A mobilization line item that was $15,000 in the bid but $45,000 in the SOV is a front-loading attempt.

Compare SOV values against bid values for corresponding scope items
Flag any SOV item more than 20% above the bid price for the same scope
Require written justification for significant bid-to-SOV price shifts
Calculate projected billing curve and compare against schedule S-curve

Labor/Material Split Review

Labor and material splits on major line items give the GC additional data for verifying billing accuracy. A line item that is 60% materials should show different billing patterns than one that is 80% labor.

When to require splits:

Every line item exceeding $50,000
All mechanical, electrical, and plumbing scope items regardless of value
Any line item that includes significant equipment or prefabrication
Items with stored materials potential (the split clarifies what is material vs. labor)

Why splits matter for billing verification:

A $300,000 HVAC ductwork line item split as $180,000 materials and $120,000 labor creates two verification paths. Materials can be verified through delivery tickets and stored inventory. Labor can be verified through daily reports and crew counts. Without the split, the sub claims 55% complete and you have one blended number to evaluate against field observation.

Standard splits by trade:

Trade	Typical Material %	Typical Labor %	Notes
Electrical	45-55%	45-55%	Higher material % on distribution, higher labor % on rough-in
Mechanical/HVAC	50-60%	40-50%	Equipment-heavy scopes shift toward 70/30 material
Plumbing	40-50%	50-60%	Fixture-heavy scopes shift toward 60/40 material
Drywall	30-40%	60-70%	Labor-intensive trade
Concrete	35-45%	55-65%	Formwork and rebar are material-heavy
Steel	60-75%	25-40%	Fabrication drives material percentage
Roofing	50-60%	40-50%	Material percentage increases with system complexity

A sub submitting an SOV with labor/material splits that deviate significantly from trade norms should provide an explanation. An electrical sub claiming 80% material on a rough-in scope is either using the split to front-load materials billing or has an unusual procurement approach that warrants review.

Change Order Integration Rules

The SOV approval should establish rules for how future change orders will appear on the schedule of values. Setting these rules upfront prevents mid-project disputes about CO billing format.

Rules to establish at SOV approval:

Change orders will appear as new line items appended to the SOV, not modifications to existing items
CO line items will carry a reference number linking to the approved change order document
Deductive COs will appear as negative-value line items
The SOV total after CO additions will reconcile with the contract value plus net approved COs
Pending (unapproved) COs will not appear on the SOV until formal approval
CO line items will include labor/material splits consistent with the base SOV items

Document these rules in the SOV approval letter. The sub acknowledges the rules by signing the approved SOV. This eliminates the argument that the sub "did not know" change orders needed separate line items.

Lump Sum vs. Unit Price Analysis

Some SOV line items are better structured as lump sum. Others work better as unit price. The choice affects billing accuracy and verification difficulty.

Lump sum works for:

Items with a defined scope and clear completion milestones
Items where quantity is fixed (one elevator installation, one switchgear assembly)
General conditions and fixed-fee items
Mobilization and demobilization

Unit price works for:

Items where quantity may vary (linear feet of pipe, square feet of flooring)
Site work items affected by field conditions (cubic yards of excavation)
Items where installed quantity is easily measurable
Identify which line items should be lump sum vs. unit price
Verify that unit price items include quantity estimates and unit rates
Confirm that unit price total (quantity x rate) matches the line item contract value
Establish how quantity variations will be handled (change order threshold, not-to-exceed, etc.)

Retainage Methodology

The SOV approval should clearly state the retainage structure that will apply to every line item.

Retainage rate is specified (e.g., 10% to 50% completion, 5% thereafter)
Retainage rate complies with state statutory caps
Retainage applies to both work completed and stored materials
Retainage reduction threshold is defined (percentage complete trigger)
Process for requesting retainage reduction is documented
Retainage release timing is specified (sub substantial completion vs. project substantial completion)
Any items exempt from retainage are specifically identified and justified

Special retainage considerations:

Equipment purchases often warrant reduced or zero retainage after delivery and installation, because the GC takes title upon payment and the equipment provides its own security. Negotiate this at SOV approval, not during billing.

Long-lead items with extended fabrication periods may accumulate disproportionate retainage before any work is installed. A $500,000 curtain wall system at 10% retainage accumulates $50,000 in retainage during fabrication alone. Consider whether reduced retainage on fabrication (with full retainage on installation) is appropriate.

Final SOV Approval Checklist

Before signing the SOV approval:

Frequently Asked Questions

How long should SOV review take? Budget 2-4 hours for the initial SOV review on a major subcontract ($500K+). This includes the granularity analysis, front-loading check, and labor/material split verification. The investment saves 10-20 hours of billing dispute resolution over the project lifecycle.

Can I reject an SOV and require resubmission? Yes. The SOV is subject to GC approval per the subcontract. Reject and require resubmission for any SOV that fails the granularity, front-loading, or documentation standards in this checklist. Most subs resubmit within 5-7 business days.

Should the sub's project manager attend the SOV review meeting? Yes. A 30-minute SOV review meeting with the sub's PM clarifies scope questions, resolves line item disagreements, and establishes billing expectations before the first draw. This meeting prevents months of billing disputes.

What if the sub insists on fewer line items than I require? Document the granularity requirement in your subcontract standard terms. If the sub signed a contract requiring SOV approval and you have reasonable granularity standards, the sub must comply. Fewer than your minimum indicates either insufficient scope understanding or an intent to bill ambiguously.

How do I handle an SOV for a design-build subcontract? Design-build SOVs need separate line items for design services and construction services. Design is typically billed on a monthly or milestone basis. Construction follows standard progress billing. Blending the two creates verification problems because design progress is measured differently than construction progress.

Should I keep SOV drafts and revision history? Yes. Retain all SOV submissions and the final approved version. If a dispute arises about line item values or structure, the revision history shows what was proposed, what was changed, and why. This documentation is valuable in surety claims and owner audits.

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