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Mainstreet Promo code
Make money and boost profitability
Mainstreet helps small businesses manage their finances. From relevant savings to profitable negotiations to overlooked tax credits, everything is analyzed in a comprehensive approach. The result is valuable savings and easier business growth.
Redeemed 84 times - Verified discount · June 2026
Mainstreet
4.6/5
(31)
Deal details
This offer is applicable only to US-based businesses
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Save up to $500
$500 in credits
Eligibility questions
All the applications are manually approved by our Customer Success Team. If you have questions about our application process, please send us an e-mail at applications@joinsecret.com.
This deal can be used if you have not signed up for Mainstreet yet or if you're using it on the free version.
Deal details
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Mainstreet Promo Code: $500 in credits
These FAQs explain how the Mainstreet credits work through Joinsecret, who can use them, how approval works, whether existing users on the free version can qualify, and what happens if the offer cannot be accessed. In short, this offer gives eligible US-based businesses up to $500 in credits on Mainstreet. We have kept the answers practical and straightforward so you can quickly understand the rules, estimate your savings, and decide whether this is the right time to activate the offer.
How do I redeem this Mainstreet promo code?
To redeem your Mainstreet promo code, claim the offer through Joinsecret, create your Mainstreet account, and complete the requested business details. The offer is generally available to US-based businesses that are new to Mainstreet or still on the free plan, so your account must match those conditions.
Who is eligible for this Mainstreet discount code?
This Mainstreet discount code is intended for US-based businesses that have not signed up yet or are still using Mainstreet’s free version.
Why should I take advantage of this Mainstreet discount?
You should use this Mainstreet discount if you want to reduce your starting cost and try the platform with less risk. We find it especially valuable because $500 in credits can ease your first expenses and help you evaluate Mainstreet before committing more budget.
$500 in credits
Eligibility questions
All the applications are manually approved by our Customer Success Team. If you have questions about our application process, please send us an e-mail at applications@joinsecret.com.
General information
Running a small business on a daily basis is complex, as many challenges and difficulties arise all the time. For this reason, it can be difficult to find time for time-consuming tasks such as tax optimization of the business. Indeed, in any business, there are savings to be made or opportunities to be taken advantage of that are overlooked due to lack of time. To meet this need, Mainstreet assists companies in this process and allows them to save a lot of time while becoming more efficient. And it works, because Mainstreet has already saved over $100 million for more than 2,000 companies.
Mainstreet’s proposition is simple: grow your business and focus on running your business, while Mainstreet’s teams look for financial opportunities for you. They can take care of your tax returns and save you a lot of paperwork. In addition, they can recommend tax credits. Finally, Mainstreet is also able to alert you to discounts on essential equipment such as software.
Via a dashboard, you can track expenses and savings throughout the year with Mainstreet’s help. This allows you to better plan your budget and manage your business. In terms of pricing, the Mainstreet team's fee is clear and transparent: it is 20% of the savings they help you achieve. So you have nothing to lose, because Mainstreet must actually make you money in order to pay itself.
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Frequently Asked Questions about Mainstreet's promo
Can existing customers benefit from this Mainstreet coupon?
Yes, but only in one case: existing Mainstreet users can use this coupon if they are still on the free version. Paid customers are generally not eligible.
What are the guarantees of this Mainstreet promo?
The Mainstreet promo includes a membership refund guarantee through Joinsecret if you cannot access the offer and have not redeemed any other deal.
How will I know if I am approved for this Mainstreet deal?
You will usually know your Mainstreet deal is approved once your account is set up and the $500 in credits appears or is confirmed during onboarding. If not, first verify that your business is US-based and that you are either new to Mainstreet or on its free plan.
How much can I save with this Mainstreet promo code?
With this Mainstreet promo code, you can save up to $500 in credits. In practical terms, that can reduce your upfront cost, give you more flexibility to test the service, and let you preserve budget for other business priorities while getting started.
Mainstreet features
Run your business while Mainstreet makes you money
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Get immediate access to your money
If your company is eligible for R&D, you can receive a 0% cash advance. Help from Mainstreet’s expert negotiators can help you go beyond that and save even more money.
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Fast-track your payment
With Mainstreet's speedy payment process, you can receive your cash advance in just 7-10 days. They understand that time is money, so they make sure to provide the services as efficiently as possible.
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Be protected in the event of an audit
When a financial audit occurs, Mainstreet steps in and supports you throughout the process. If Mainstreet makes an error, you are covered for up to $1 million.
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Optimize your R&D credits
Mainstreet's expert negotiators will help you get the most out of your R&D credits. This feature helps you save even more money by maximizing your potential tax credits and deductions.
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Monitor your savings at any time
Via a pleasant and ergonomic dashboard, follow the evolution of your savings by consulting various economic reports available directly in your space.
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Secure your data in the best possible way
All of Mainstreet’s data is secured with 256-bit encryption. In addition, financial data is never rented or sold to third parties.
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Round-the-clock support
Mainstreet's customer support team is available 24/7 to assist you with any questions or concerns you may have. They pride themselves on providing top-quality customer service, so you can rely on us to always be there for you.
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Benefit from an automated process
Mainstreet offers synchronization in minutes with top payroll and accounting software such as Gusto, Sage Intact, Quickbooks, or Xero. You can get an initial estimate of your savings in less than 20 minutes.
Mainstreet Reviews
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Cleotilde Hermann
Plain-Language Steps and Deadline Reminders
What stood out to me was how Mainstreet translated fairly technical tax incentive rules into plain steps our ops team could actually follow, and the reminders kept us from missing deadlines we probably would have overlooked
June 2, 2026
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Amb. Winnifred Zemlak
Smooth Setup with Payroll and Finance Integrations
Setup was smoother than I expected, and the integration points for payroll and financial data cut down on manual uploads a lot, though I still had to double-check a few figures on our side before submitting
May 25, 2026
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Noella Walter CPA
Focused, Credible Credit Recommendations
I appreciated that Mainstreet did not push every possible program at us and instead focused on the credits that matched our payroll and R&D activity, which made the whole process feel grounded and credible
May 19, 2026
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Charlsie Borer
Early Savings Estimate for Lean Teams
Mainstreet was helpful for a lean startup because it gave us a fairly clear estimate of potential savings early on, then backed it up with a process that did not eat up weeks of internal time
May 11, 2026
More Mainstreet's reviews
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