Late Fee Calculator / Consultants

Late Fee Calculator for Consultants

Consultants typically invoice for large engagements, making late payments especially painful for cash flow. The shift to retainer-based billing has helped, but project-based work still suffers from net-30 and net-60 terms that clients stretch to net-90.

Invoice amount

Days overdue30 days

Late fee methodFee rate

%/month

Late fee owed

$150.00

on a $10,000 invoice

Total amount owed$10,150.00

Daily cost of delay$5.00/day

Effective annual rate18.3% APR

After 90 days: $450.00 in fees

That's 4.5% of the invoice value

Typical consultants fee: 1.5%/mo

Range: 1%/mo to 2%/mo or $100 flat

Typical Late Fees for Consultants

Level	Late Fee
Low / lenient	1%/mo
Industry standard	1.5%/mo
Aggressive / max	2%/mo or $100 flat

Late Payment Tips for Consultants

✓Structure engagements with milestone payments — 50% upfront, 25% at midpoint, 25% on delivery
✓For retainer clients, pause work when payment is 15+ days overdue rather than accumulating unpaid hours
✓Include an "interest on overdue amounts" clause in your Master Services Agreement (MSA)
✓Bill weekly or bi-weekly for hourly work instead of monthly to reduce exposure
✓Set net-15 terms rather than net-30 — shorter terms correlate with faster payment

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Late Fees for Other Business Types

Freelancers Contractors Small Businesses Creative Agencies SaaS & Subscriptions