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Rebate vs. Grant vs. Cost Share vs. Credit

Last verified 8/12/26

These labels describe different cash flow and obligations. A rebate usually pays after an approved purchase or project. A grant funds an approved scope under an agreement. Cost share pays a defined portion or scheduled amount. A bill credit reduces a charge. Free material, direct installation, a loan, technical help, and a buyout are different again.

Ignore the marketing word for a moment. Ask who pays first, how the amount is calculated, when money moves, what proof is required, and what obligation continues afterward.

When the answer changes

SituationWhat it means
RebateYou commonly pay first and claim after approval and completion.
GrantThe agency awards funds for an approved scope; agreements, milestones, and reimbursement rules may apply.
Cost shareThe program covers part of an approved practice or a scheduled amount; the owner keeps the remaining cost.
Bill creditThe benefit appears on a utility bill, once or repeatedly.
Direct installation or free materialThe agency or partner supplies the good or work rather than reimbursing your purchase.
Loan or buyoutThe program finances or acquires property; it is not a discount on a materials order.

The program’s own definitions control. Use this table to know what to ask—not to replace the official application, agreement, design, or local approval.

What to do next

  1. Find the formal benefit type in the official rules.
  2. Write down eligible costs and excluded costs.
  3. Identify whether the amount is fixed, per area, percentage, scheduled, or capped.
  4. Confirm who signs contracts and who pays contractors or suppliers.
  5. Estimate your maximum out-of-pocket cash before the benefit arrives.
  6. Record maintenance, reporting, repayment, or property obligations.

Real programs to compare

North CarolinaActive

Raleigh Rainwater Rewards

Standard cost share: 90% of eligible cost. Qualified subsidy: up to 100%. Permeable pavement basis: 90% of incremental cost over traditional pavement.

Last verified 8/11/26View program →
PennsylvaniaActive

Philadelphia Water Department Rain Check

Rain garden: $22.00 per square foot up to $2,500.00. Permeable pavers: $20.00 per square foot up to $2,500.00. Metal downspout planter: $1,100.00 subsidy with $100.00 participant payment. Rain barrel: free 55 gallon barrel approximately $175.00 value.

Last verified 8/11/26View program →

Common mistakes

  • Calling every benefit a rebate.
  • Comparing caps without comparing eligible costs.
  • Assuming a recurring credit pays construction cost.
  • Assuming a zero-interest loan is free money.
  • Ignoring the time between completion and reimbursement.

A five-minute check before you commit money

  • I confirmed the exact address, account, applicant, and property type.
  • I opened the current official program source.
  • I know whether approval or a contract must come before work or purchase.
  • I can separate required, allowed, reimbursable, and excluded work.
  • I know who pays first and what proof is required.
  • I saved the important answer or approval in writing.

FAQs

Which type is best?

The best fit depends on cash flow, project control, eligible costs, timing, and obligations—not the label.

Does cost share always mean a fixed percentage?

No. Some programs use payment schedules, practice caps, or negotiated eligible costs.

Can a free assessment still be valuable?

Yes. Technical design or site advice can prevent an ineligible or unsafe project even when no cash is offered.

Official sources

Rules vary by program. Use the official sources below to confirm the details that apply to your project.