How is Tunnel to Towers funded and what is its annual budget for homes?

Checked on January 26, 2026
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Executive summary

The Stephen Siller Tunnel to Towers Foundation is funded primarily through private donations, fundraising campaigns and corporate partnerships, operates with a high program-spending ratio reported by independent evaluators, and maintains substantial assets that support its housing work [1] [2] [3]. The foundation does not publish a simple, singular “annual budget for homes,” but recent grant totals and public reporting allow a close estimate: the foundation reported roughly $173 million in grants in 2024 and has signaled it will deliver over 200 mortgage-free homes in a single year, indicating a multi-hundred-million-dollar multi-year commitment to housing within its broader $500M+ programmatic outlays to date [3] [4].

1. How Tunnel to Towers raises money: donors, events, and partners

Tunnel to Towers’ public materials and watchdog profiles show the organization relies on individual donations, organized fundraising campaigns and corporate support to fund its programs; the foundation emphasizes keeping fundraising and administrative costs low and highlights independent evaluations like Charity Navigator’s favorable rating to bolster donor confidence [1] [4]. External database snapshots and grant‑making profiles confirm the foundation files standard nonprofit disclosures (Form 990s) and is visible to institutional funder research tools, which is consistent with a funding model built on broad-based charitable giving and institutional reporting [5] [6].

2. Scale of assets and grantmaking that underwrites homes

Public grant-data aggregators and the foundation’s audited statements indicate significant financial scale: an Instrumentl summary reports the foundation had assets in the hundreds of millions and disbursed approximately $173,102,802 in grants during 2024, and the foundation’s own and third‑party reporting say it has committed more than $500 million across all programs to date [3] [4]. Those asset and grant totals are the clearest, documentable way to understand the money that can be devoted to homes, because the foundation packages housing within larger programmatic spending rather than isolating a single annual “home budget” line in public summaries [3] [7].

3. Program spending vs. overhead — what portion actually funds homes

Independent evaluators and the foundation’s fact sheets repeatedly emphasize a high program-to-overhead ratio, with CharityWatch reporting the organization spends roughly 93% of its cash budget on programs and minimizes overhead to about 7% — a framing the foundation uses to argue most donated dollars fund services such as mortgage-free homes and adaptive home builds [8] [2]. This high program ratio supports the claim that a large majority of annual expenditures flow into mission activities, including the Smart Home and In the Line of Duty programs that produce and retrofit houses for catastrophically injured veterans, first responders, and Gold Star families [8] [2].

4. Homes produced per year and inferred annual home spending

Tunnel to Towers publicly states it delivered over 1,200 mortgage-free homes cumulatively and that in a recent year it planned to deliver over 200 homes, while its annual reporting and audited statements document multi‑million-dollar program outlays — the Instrumentl 2024 grant figure of about $173M and the foundation’s own note of $500M+ committed historically provide the best available anchors for annual housing spending, though neither source isolates a standalone “homes budget” line [3] [4]. Therefore, while program grants in 2024 (~$173M) indicate the scale of funds available for homes, the precise annual dollar amount dedicated exclusively to building or paying off homes is not explicitly broken out in the public documents analyzed [3] [7].

5. Limits, alternative readings, and what remains unclear

Public filings and audited financials exist and are cited by watchdogs and aggregator services, but the foundation’s public-facing materials aggregate housing with other program spending rather than publishing a single annual line-item titled “homes budget,” so any figure attributing a specific dollar amount solely to homes is an inference drawn from total grants, program ratios and home-production figures rather than a direct disclosure [7] [8] [3]. Donor-facing claims about low overhead and program focus are corroborated by CharityWatch and Charity Navigator citations, but skeptics could ask for a year-by-year line-item schedule showing exactly how much was spent on new home construction, retrofits, mortgage payoffs and related services — that level of granularity was not apparent in the sources reviewed [8] [1].

Want to dive deeper?
How many mortgage-free homes did Tunnel to Towers deliver each year from 2015–2024 according to audited reports?
What line items in Tunnel to Towers’ audited financial statements correspond to home construction, remodeling, and mortgage payoffs?
Which corporate partners and major donors publicly disclose contributions to Tunnel to Towers and how large were those gifts?