Your software platform is growing fast and payment volume is hitting record highs, but your monthly processing statement is peppered with fees. Every card transaction eats into your margins, yet raising fees on your merchants risks driving them straight to a competitor.

As a SaaS platform, you can reduce payment costs without raising merchant fees by negotiating interchange-plus pricing, and optimizing card transactions with tokens and complete data. 

Platforms like Fiska make this easier by giving you the pricing control and flexibility to adjust your cost structure without ever having to touch what your merchants pay.

Where do your payment costs actually come from?

You can’t meaningfully reduce payment costs until you understand what you’re paying for on every transaction.

Every card payment is made up of three fees that go to three different parties.

• The interchange fee goes directly to the bank that issued the customer’s credit or debit card. Card networks like Visa and Mastercard set these baseline rates, which means you can’t negotiate them.
• On top of interchange, card networks charge assessment fees to help cover their operating costs.
• Finally, your payment provider adds a processor markup. This markup, along with ancillary costs like gateway fees, monthly platform charges, and compliance penalties, is where payment processors generate their profit margin.

Real cost reduction comes from chipping away at processor markups and ensuring your transactions qualify for the lowest possible interchange categories.

How your pricing model affects how much margin you keep

Your payment structure dictates how much profit you keep as transaction volume scales across your platform.

• Flat-rate pricing bundles interchange fees, network assessments, and processor markups into a single fixed rate, such as 2.9% plus $0.30 per transaction.
• Interchange-plus pricing separates raw card network costs from the processor markup.

While flat rates offer simple accounting for early-stage platforms, they act as a black box. Your provider sets the rate high enough to protect their margins against expensive rewards cards, meaning you pay a premium on cheaper debit card transactions.

The line-item transparency you get with interchange-plus pricing shows you the exact unit economics of every transaction. Once you see the true cost basis, you can identify where you’re overpaying and recapture margin without touching what your merchants pay.

5 strategies to reduce payment costs without raising merchant fees

You don’t need to charge your merchants more just to protect your own bottom line. Use these cost-savings strategies to reduce your costs without changing your merchants’ pricing. 

1. Negotiate your processor markup as payment volume grows

Your processing volume gives you leverage when negotiating with payment providers. That means rates that made sense when your platform processed $100,000 a month no longer apply once you pass millions in annual volume.

Periodically review the components of your processing agreement, including:

• Processor markup percentages
• Fixed per-transaction cents
• Monthly gateway or platform fees
• PCI compliance penalties
• Chargeback and dispute assessment fees

Benchmark your current agreement against other providers rather than automatically renewing the same terms, and establish regular review intervals based on processing milestones. When your annual volume hits a new threshold, use that scale to renegotiate lower markups.

2. Use interchange-plus pricing to see your true costs

Switching to an interchange-plus model surfaces the underlying economics of every transaction. With clear line-item visibility, you can easily spot cost leaks across your merchant portfolio.

You can quickly identify which merchant categories carry higher processing expenses and catch transaction types that trigger expensive card network downgrades.

This level of detail also reveals if your processor is quietly raising its markup over time, giving you the data you need to protect your margins.

3. Optimize card transactions to qualify for lower interchange tiers

Card networks assign different interchange rates based on how a transaction is submitted. Missing data fields or improper processing flows push transactions into higher fee tiers.

You can lower your effective rates by refining how data passes through your payment gateway:

• Pass complete customer address and verification data on every transaction
• Use network tokens instead of raw card numbers to reduce fraud risk
• Capture Level 2 and Level 3 line-item data on commercial and corporate card payments
• Avoid card-not-present downgrades by prompting for security codes

A fractional percentage reduction might look small on a single $50 transaction. But across a portfolio processing $100 million annually, that tiny optimization yields tens of thousands of dollars in retained revenue.

Not sure if you’re paying the right interchange fees? Learn more in this article: Interchange optimization for SaaS platforms: What you need to know

4. Reduce the hidden operational costs of payment risk

Transaction fees are only part of what you spend on payments. Fraud losses, chargeback fines, account holds, and manual risk reviews eat away at your platform margins.

The best place to address these hidden operational expenses is during merchant signup.

Aggregators like Stripe often move merchants through a quick signup form without conducting thorough checks upfront. When they audit those accounts weeks later, they may freeze merchant funds and lock accounts. That creates support nightmares for your team and leads to angry merchants leaving your platform.

As Fiska CEO Patrick Huynh puts it: “Stripe can onboard merchants very quickly but then they put them on hold because they’re doing their KYC after the fact… there’s nothing worse than processing a few thousand dollars and then having those funds frozen.”

Collecting business details, ownership verification, and processing profiles upfront eliminates post-activation surprises. Doing proper verification upfront protects your software platform from chargeback exposure and prevents frozen funds.

5. Align pricing structures with merchant risk and transaction profiles

Charging every merchant a single flat rate can inadvertently cause high-cost merchants to eat into your overall margins. A high-volume business processing domestic debit cards costs far less to serve than a merchant processing international rewards cards.

Rather than raising fees arbitrarily, structure your account tiers so pass-through costs are accurately reflected:

• Pass low-cost debit savings directly through on interchange-plus to high-volume accounts.
• Ensure high-risk or international accounts operate on pricing structures that account for their higher baseline card network fees.
• Bundle processing capabilities into higher tier SaaS subscription packages to offset operational overhead.

How Fiska helps software platforms improve payment economics

Fiska provides the embedded payments infrastructure you need to control payment costs and build new revenue streams. Built exclusively for software platforms, we act as your fractional Head of Payments, taking care of background compliance and card network mechanics so you can focus on building your core product.

Here’s how Fiska helps you optimize payment economics:

• Transparent cost basis at interchange: You get full visibility into wholesale card network costs, which makes it simple to track unit economics and price competitively.
• True revenue share model: Set your own merchant rates above interchange and split the margin with us 50/50, creating a recurring revenue stream with no platform or monthly access fees.
• No exclusivity or volume commitments: Keep your commercial model flexible without being locked into rigid volume targets.
• Flexible pricing configuration per merchant: Tailor rates by vertical, volume tier, or customer segment to stay competitive across every market.
• Flexible monetization options: Choose whether to bundle payments into subscription plans or offer processing as a standalone feature.
• Fully managed onboarding and compliance: Merchants onboard through an embedded web form, while we handle PCI DSS compliance, KYC/KYB checks, and risk monitoring behind the scenes under your brand.

Protecting your software margins doesn’t require pushing higher costs onto your merchants.

By shifting to interchange-plus pricing, optimizing transaction data,  and conducting thorough merchant checks upfront, you can trim unnecessary processing expenses.

Combining these optimizations with a transparent, revenue-sharing infrastructure partner turns payment processing from a costly administrative burden into a high-margin revenue stream for your business.

FAQ

How much can a software platform save by switching from flat-rate to interchange-plus pricing?

Savings vary based on transaction volume and card mix, but platforms shifting from a flat-rate to interchange-plus often see effective processing costs drop significantly. 

On low-cost debit transactions and non-rewards card payments, pass-through pricing removes the extra markup processors charge to pad their own margins, allowing you to retain those margins or pass savings to high-volume merchants.

Will changing our payment setup disrupt our existing merchants?

No. When managed properly through a dedicated payments partner, migrating to an embedded setup or adjusting your underlying processing rails requires no operational disruption for your merchants. 

Saved card credentials and payment profiles migrate securely using universal tokenization, allowing repeat billing and checkouts to continue without forcing merchants or end customers to re-enter their card details.

How does thorough merchant onboarding reduce payment operations costs?

Completing identity, business, and processing checks upfront prevents high-risk or fraudulent accounts from processing transactions. This prevents account freezes, reduces chargeback exposure, and cuts down on manual support tickets after launch, which saves your team from costly operational fixes later.