Dynamic discounting for government is a financial arrangement where a city or municipality earns a small discount — typically around 1% of the invoice value — when a third-party provider pays the city's vendors early on the city's behalf. Instead of requiring the city to speed up its own payment process or dip into reserves, the third party funds the early payment and shares a portion of the fee it collects from the vendor back with the city. The result: vendors get paid in days instead of months, and the city generates revenue it didn't have before — without changing a single internal process.
If you manage a municipal budget, that probably sounds too good to be true. It isn't. But it does require understanding the mechanics. This article breaks down how dynamic discounting works in a government context, what distinguishes it from other early payment models, and how to evaluate whether it makes sense for your city.
Key Takeaways
- Dynamic discounting lets cities earn roughly 1% cashback on every invoice financed through an early payment provider — turning accounts payable into a revenue line.
- The city pays nothing. The vendor pays a flat fee for early payment. A portion of that fee is shared back with the city as a discount.
- No process changes required. The city approves invoices on its normal timeline. The early payment provider handles everything else.
- Vendor participation is voluntary. Vendors choose which invoices to accelerate, on a per-invoice basis. No one is forced into anything.
- This is not a loan. Early payment providers like Lunch purchase approved invoices. There's no interest, no compounding, no credit check, and no repayment obligation for the vendor.
How Government Payments Typically Work
Most cities pay vendors on Net 30 to Net 60 terms, though actual payment timelines often stretch to 60–90 days or longer once you factor in approval workflows, inspection holdbacks, and disbursement cycles. According to the Institute of Finance and Management, the average accounts payable cycle for government agencies ranges from 30 to 45 days — and that's measured from invoice receipt, not from when the vendor actually delivered the work.
This isn't because cities are trying to delay. Municipal payment systems are built around appropriation controls, compliance checks, and multi-step approvals that exist for good reason. But the downstream effect on vendors — especially small and mid-size businesses — is real. A landscaping company waiting 75 days for a $40,000 payment may struggle to make payroll or buy materials for the next job. That cash flow gap is the true cost of slow vendor payments and it often falls hardest on the businesses least equipped to absorb it.
What Is Dynamic Discounting?
Dynamic discounting is a model where the buyer (in this case, a city) receives a discount on an invoice in exchange for the vendor getting paid earlier. The "dynamic" part means the discount adjusts based on how early the payment is made — the earlier the payment, the larger the potential discount.
In corporate supply chains, dynamic discounting has been used for decades. A buyer with excess cash might offer to pay a supplier in 10 days instead of 60, capturing a 2% discount under "2/10 Net 60" terms. According to Ardent Partners' 2024 Accounts Payable Metrics Report, approximately 41% of large enterprises now use some form of early payment discount program.
The challenge for government is that cities rarely have excess cash sitting idle. Budgets are allocated. Cash flow is cyclical. Paying vendors early out of the city's own reserves is usually not practical — and may conflict with treasury management policies.
That's where third-party early payment providers change the equation.
How Dynamic Discounting Works With a Third-Party Provider
When a city partners with an early payment provider, the mechanics shift. The city doesn't need to move money faster. Here's the step-by-step:
Step 1: The City Approves an Invoice
The city receives a vendor invoice, processes it through its normal approval workflow, and marks it as approved. Nothing changes here. The city's existing timeline, systems, and controls stay exactly the same.
Step 2: The Provider Pays the Vendor Early
Once the invoice is approved, the early payment provider — companies like Lunch, C2FO, or SAP Taulia — advances payment to the vendor. Depending on the provider, the vendor may receive funds in as little as 1–3 business days.
Step 3: The Vendor Pays a Flat Fee
The vendor pays a fee for early access to funds. In Lunch's model, this is a flat fee — not an interest rate. There's no compounding, no credit check, and no repayment obligation. If the city ultimately pays the invoice late, the vendor doesn't owe more. This is a critical distinction from invoice factoring, where costs can escalate if the buyer is slow to pay.
Step 4: The City Pays on Its Normal Schedule
The city pays the invoice when it was always going to — Net 30, Net 45, Net 60, whenever. The payment now goes to the early payment provider instead of the vendor, since the provider already paid the vendor.
Step 5: The City Receives a Discount
Here's the revenue-positive part. The provider shares a portion of the fee it collected from the vendor with the city, typically around 1% of the invoice value. This is the dynamic discount. It arrives as earned revenue — not a rebate that requires upfront spending, and not a grant that comes with strings attached.
The Revenue Opportunity: What 1% Actually Looks Like
One percent may sound small. It isn't.
Consider a mid-size city that processes $50 million in vendor invoices annually. If 30% of those vendors opt into early payment (a conservative adoption rate based on industry benchmarks from Hackett Group, which reports 25–40% participation in mature programs), that's $15 million in financed invoices. At a 1% cashback rate, the city earns $150,000 per year.
| Annual Vendor Spend | Vendor Adoption Rate | Financed Volume | ~1% Cashback to City |
|---|---|---|---|
| $20 million | 30% | $6 million | $60,000 |
| $50 million | 30% | $15 million | $150,000 |
| $100 million | 30% | $30 million | $300,000 |
| $200 million | 35% | $70 million | $700,000 |
That's new revenue generated from an existing expenditure stream. The city doesn't spend more. It doesn't hire more staff. It doesn't change a single line in its budget. It just earns a return on invoices it was already going to pay.
For context, the Government Finance Officers Association (GFOA) reports that many municipalities spend 1.5–3% of their total budget on accounts payable processing costs alone. Dynamic discounting doesn't eliminate those costs, but it creates revenue that can partially offset them.
Dynamic Discounting vs. Other Early Payment Models
Not all early payment approaches work the same way. Here's how dynamic discounting compares to the other options a city might encounter.
| Feature | Dynamic Discounting (Third-Party) | Self-Funded Early Payment | Invoice Factoring | P-Card / Credit Card Rebates |
|---|---|---|---|---|
| City uses its own cash | No | Yes | No | No |
| City earns revenue | Yes (~1%) | Sometimes (as a discount) | No | Yes (0.5–1.5%) |
| Vendor cost structure | Flat fee, predictable | Discount off invoice | Variable rate, can compound | Card processing fees (2–3%) |
| Vendor chooses per invoice | Yes | Depends on terms | Usually no — full portfolio | No — all or nothing |
| Credit check on vendor | No (with providers like Lunch) | N/A | Yes | N/A |
| Process change for city | None or minimal | Significant (treasury, timing) | None | Moderate (payment method switch) |
Self-funded early payment requires the city to accelerate its own cash outflows, which most treasuries cannot support. Invoice factoring puts the burden and risk on vendors, often with unfavorable terms. P-card rebates can generate revenue but shift costs to vendors via credit card processing fees — and many government vendors, particularly small businesses, already operate on thin margins.
Dynamic discounting through a third-party early payment provider avoids all three problems. The city keeps its payment schedule. The vendor gets a transparent, fixed cost. And participation is voluntary on every invoice.
Why This Matters for Vendor Relationships
City finance directors think about budget lines, fund balances, and audit exposure — as they should. But they also know that the city's vendor base is, in many cases, the city's own tax base. Local businesses that contract with the city employ residents, pay taxes, and reinvest in the community.
When those businesses wait 60–90 days to get paid, some of them borrow to cover the gap. According to the Federal Reserve's 2024 Small Business Credit Survey, 43% of small businesses that applied for financing did so to cover operating expenses or cash flow shortfalls — not to grow.
A municipal early payment program addresses that problem directly. Vendors who opt into early payment through providers like Lunch get paid in 1–3 business days. They pay a flat fee for the service — no interest rate, no compounding, no credit check, no minimum invoice size. And because providers like Lunch report paid invoices to Experian, vendors can build commercial credit history without taking on debt.
This means a city can support its local small businesses without spending a dollar — and actually earn revenue in the process.
What It Takes to Implement
One of the most common concerns from finance directors is implementation burden. If a program requires IT integration, staff retraining, or changes to the ERP system, it's going to sit in the "nice to have" pile indefinitely.
Dynamic discounting through a third-party provider is designed to avoid that. In most implementations:
- No ERP changes required. The provider works with the city's existing accounts payable data — often just a file export of approved invoices.
- No new procurement process. This isn't a contract the city procures in the traditional sense. The city is receiving revenue, not spending funds.
- No vendor onboarding by city staff. The provider handles vendor enrollment, payment processing, and support.
- No risk to the city. The city pays the same amount, on the same timeline, to a different payee. If a vendor doesn't opt in, nothing changes for that invoice.
Total implementation time varies by provider, but programs can often be live within 30–60 days of agreement.
How to Evaluate a Dynamic Discounting Provider
If you're considering this for your city, here are the questions worth asking:
What does the vendor actually pay? Look for a flat fee structure with no interest and no compounding. If the provider charges a variable rate, ask what happens if the city pays late. The vendor shouldn't bear that risk.
Is there a credit check or minimum? Programs that require vendor credit checks or minimum invoice sizes will exclude the businesses that need early payment the most. Look for providers where every approved vendor qualifies automatically.
Is participation truly voluntary? Vendors should be able to choose which invoices to accelerate, every time. Anything that enrolls vendors automatically or requires portfolio-wide participation should raise a flag.
What revenue does the city receive? Get the number in writing. Understand whether it's a percentage of every financed invoice or a flat annual amount. Ask how the provider calculates it and when it's paid.
What does the city need to do operationally? If the answer is "almost nothing," that's a good sign. If the answer involves months of IT work, weigh that cost carefully.
Lunch, for example, operates on a model where the city shares approved invoice data, vendors choose which invoices to accelerate, and the city receives approximately 1% cashback on each financed invoice — with zero cost and no process changes for the agency. Other providers may have different structures, so it's worth comparing.
When Dynamic Discounting Makes the Most Sense
Dynamic discounting generates the most value for cities that:
- Process a high volume of vendor invoices. More invoices means more potential revenue.
- Have payment cycles of 30 days or longer. The longer the standard payment timeline, the more vendors benefit from early payment — and the higher the adoption rate tends to be.
- Work with many small and mid-size vendors. These businesses are most likely to opt into early payment because cash flow gaps hit them hardest.
- Want to support their vendor base without adding budget. Dynamic discounting is a way to do something real for vendors without a budget request.
It's less impactful for cities that already pay most invoices within 10–15 days, or cities that work primarily with large corporations that have their own treasury operations and don't need early payment.
Frequently Asked Questions
Does dynamic discounting cost the city anything?
No. In a third-party dynamic discounting model, the early payment provider funds the acceleration. The vendor pays a flat fee for early access to funds. The city pays the same amount, on the same timeline, and receives a cashback payment on each financed invoice. There is no cost, no budget line item, and no appropriation required.
Is this a loan to the vendor?
No. Providers like Lunch purchase the approved invoice from the vendor at a flat fee. There is no interest rate, no compounding, no credit check, and no repayment obligation. If the city pays later than expected, the vendor does not owe additional fees. This distinguishes it from invoice factoring or traditional lending.
How much revenue can a city realistically expect?
It depends on total vendor spend and adoption rate. A city processing $50 million in annual vendor invoices with a 30% vendor adoption rate could earn approximately $150,000 per year at a 1% cashback rate. Larger cities with higher spend volumes will see proportionally larger returns.
Do vendors have to participate?
No. Participation is entirely voluntary. Vendors choose which invoices to accelerate on a per-invoice basis. They can opt in for one invoice and not the next. No vendor is enrolled automatically or required to participate as a condition of doing business with the city.
How long does it take to set up a dynamic discounting program?
Most third-party providers can have a program live within 30–60 days. The city's primary responsibility is sharing approved invoice data with the provider. No ERP integration, staff training, or procurement process changes are typically required. To explore what setup looks like, you can reach out to the Lunch team directly.